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简介

PHP官方手册主要包含了四大部分为了便于查阅进行整理总结，本篇主要是第二部分函数参考。

核心扩展库

1. 字符串

addcslashes Quote string with slashes in a C style
addslashes Quote string with slashes
bin2hex Convert binary data into hexadecimal representation
chop Alias of rtrim
chr Return a specific character
chunk_split Split a string into smaller chunks
convert_cyr_string Convert from one Cyrillic character set to another
convert_uudecode Decode a uuencoded string
convert_uuencode Uuencode a string
count_chars Return information about characters used in a string
crc32 Calculates the crc32 polynomial of a string
crypt One-way string hashing
echo Output one or more strings
explode Split a string by string
fprintf Write a formatted string to a stream
get_html_translation_table Returns the translation table used by htmlspecialchars and htmlentities
hebrev Convert logical Hebrew text to visual text
hebrevc Convert logical Hebrew text to visual text with newline conversion
hex2bin Decodes a hexadecimally encoded binary string
html_entity_decode Convert all HTML entities to their applicable characters
htmlentities Convert all applicable characters to HTML entities
htmlspecialchars_decode Convert special HTML entities back to characters
htmlspecialchars Convert special characters to HTML entities
implode Join array elements with a string
join Alias of implode
lcfirst Make a string's first character lowercase
levenshtein Calculate Levenshtein distance between two strings
localeconv Get numeric formatting information
ltrim Strip whitespace (or other characters) from the beginning of a string
md5_file Calculates the md5 hash of a given file
md5 Calculate the md5 hash of a string
metaphone Calculate the metaphone key of a string
money_format Formats a number as a currency string
nl_langinfo Query language and locale information
nl2br Inserts HTML line breaks before all newlines in a string
number_format Format a number with grouped thousands
ord Return ASCII value of character
parse_str Parses the string into variables
print Output a string
printf Output a formatted string
quoted_printable_decode Convert a quoted-printable string to an 8 bit string
quoted_printable_encode Convert a 8 bit string to a quoted-printable string
quotemeta Quote meta characters
rtrim Strip whitespace (or other characters) from the end of a string
setlocale Set locale information
sha1_file Calculate the sha1 hash of a file
sha1 Calculate the sha1 hash of a string
similar_text Calculate the similarity between two strings
soundex Calculate the soundex key of a string
sprintf Return a formatted string
sscanf Parses input from a string according to a format
str_getcsv Parse a CSV string into an array
str_ireplace Case-insensitive version of str_replace.
str_pad Pad a string to a certain length with another string
str_repeat Repeat a string
str_replace Replace all occurrences of the search string with the replacement string
str_rot13 Perform the rot13 transform on a string
str_shuffle Randomly shuffles a string
str_split Convert a string to an array
str_word_count Return information about words used in a string
strcasecmp Binary safe case-insensitive string comparison
strchr Alias of strstr
strcmp Binary safe string comparison
strcoll Locale based string comparison
strcspn Find length of initial segment not matching mask
strip_tags Strip HTML and PHP tags from a string
stripcslashes Un-quote string quoted with addcslashes
stripos Find the position of the first occurrence of a case-insensitive substring in a string
stripslashes Un-quotes a quoted string
stristr Case-insensitive strstr
strlen Get string length
strnatcasecmp Case insensitive string comparisons using a "natural order" algorithm
strnatcmp String comparisons using a "natural order" algorithm
strncasecmp Binary safe case-insensitive string comparison of the first n characters
strncmp Binary safe string comparison of the first n characters
strpbrk Search a string for any of a set of characters
strpos Find the position of the first occurrence of a substring in a string
strrchr Find the last occurrence of a character in a string
strrev Reverse a string
strripos Find the position of the last occurrence of a case-insensitive substring in a string
strrpos Find the position of the last occurrence of a substring in a string
strspn Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask.
strstr Find the first occurrence of a string
strtok Tokenize string
strtolower Make a string lowercase
strtoupper Make a string uppercase
strtr Translate characters or replace substrings
substr_compare Binary safe comparison of two strings from an offset, up to length characters
substr_count Count the number of substring occurrences
substr_replace Replace text within a portion of a string
substr Return part of a string
trim Strip whitespace (or other characters) from the beginning and end of a string
ucfirst Make a string's first character uppercase
ucwords Uppercase the first character of each word in a string
vfprintf Write a formatted string to a stream
vprintf Output a formatted string
vsprintf Return a formatted string
wordwrap Wraps a string to a given number of characters

2. 数组

array_change_key_case Changes the case of all keys in an array
array_chunk Split an array into chunks
array_column Return the values from a single column in the input array
array_combine Creates an array by using one array for keys and another for its values
array_count_values Counts all the values of an array
array_diff_assoc Computes the difference of arrays with additional index check
array_diff_key Computes the difference of arrays using keys for comparison
array_diff_uassoc Computes the difference of arrays with additional index check which is performed by a user supplied callback function
array_diff_ukey Computes the difference of arrays using a callback function on the keys for comparison
array_diff Computes the difference of arrays
array_fill_keys Fill an array with values, specifying keys
array_fill Fill an array with values
array_filter Filters elements of an array using a callback function
array_flip Exchanges all keys with their associated values in an array
array_intersect_assoc Computes the interp of arrays with additional index check
array_intersect_key Computes the interp of arrays using keys for comparison
array_intersect_uassoc Computes the interp of arrays with additional index check, compares indexes by a callback function
array_intersect_ukey Computes the interp of arrays using a callback function on the keys for comparison
array_intersect Computes the interp of arrays
array_key_exists Checks if the given key or index exists in the array
array_keys Return all the keys or a subset of the keys of an array
array_map Applies the callback to the elements of the given arrays
array_merge_recursive Merge two or more arrays recursively
array_merge Merge one or more arrays
array_multisort Sort multiple or multi-dimensional arrays
array_pad Pad array to the specified length with a value
array_pop Pop the element off the end of array
array_product Calculate the product of values in an array
array_push Push one or more elements onto the end of array
array_rand Pick one or more random entries out of an array
array_reduce Iteratively reduce the array to a single value using a callback function
array_replace_recursive Replaces elements from passed arrays into the first array recursively
array_replace Replaces elements from passed arrays into the first array
array_reverse Return an array with elements in reverse order
array_search Searches the array for a given value and returns the first corresponding key if successful
array_shift Shift an element off the beginning of array
array_slice Extract a slice of the array
array_splice Remove a portion of the array and replace it with something else
array_sum Calculate the sum of values in an array
array_udiff_assoc Computes the difference of arrays with additional index check, compares data by a callback function
array_udiff_uassoc Computes the difference of arrays with additional index check, compares data and indexes by a callback function
array_udiff Computes the difference of arrays by using a callback function for data comparison
array_uintersect_assoc Computes the interp of arrays with additional index check, compares data by a callback function
array_uintersect_uassoc Computes the interp of arrays with additional index check, compares data and indexes by separate callback functions
array_uintersect Computes the interp of arrays, compares data by a callback function
array_unique Removes duplicate values from an array
array_unshift Prepend one or more elements to the beginning of an array
array_values Return all the values of an array
array_walk_recursive Apply a user function recursively to every member of an array
array_walk Apply a user supplied function to every member of an array
array Create an array
arsort Sort an array in reverse order and maintain index association
asort Sort an array and maintain index association
compact Create array containing variables and their values
count Count all elements in an array, or something in an object
current Return the current element in an array
each Return the current key and value pair from an array and advance the array cursor
end Set the internal pointer of an array to its last element
extract Import variables into the current symbol table from an array
in_array Checks if a value exists in an array
key_exists Alias of array_key_exists
key Fetch a key from an array
krsort Sort an array by key in reverse order
ksort Sort an array by key
list Assign variables as if they were an array
natcasesort Sort an array using a case insensitive "natural order" algorithm
natsort Sort an array using a "natural order" algorithm
next Advance the internal array pointer of an array
pos Alias of current
prev Rewind the internal array pointer
range Create an array containing a range of elements
reset Set the internal pointer of an array to its first element
rsort Sort an array in reverse order
shuffle Shuffle an array
sizeof Alias of count
sort Sort an array
uasort Sort an array with a user-defined comparison function and maintain index association
uksort Sort an array by keys using a user-defined comparison function
usort Sort an array by values using a user-defined comparison function

3. 类/对象

__autoload Attempt to load undefined class
call_user_method_array Call a user method given with an array of parameters
call_user_method Call a user method on an specific object
class_alias Creates an alias for a class
class_exists Checks if the class has been defined
get_called_class the "Late Static Binding" class name
get_class_methods Gets the class methods' names
get_class_vars Get the default properties of the class
get_class Returns the name of the class of an object
get_declared_classes Returns an array with the name of the defined classes
get_declared_interfaces Returns an array of all declared interfaces
get_declared_traits Returns an array of all declared traits
get_object_vars Gets the properties of the given object
get_parent_class Retrieves the parent class name for object or class
interface_exists Checks if the interface has been defined
is_a Checks if the object is of this class or has this class as one of its parents
is_subclass_of Checks if the object has this class as one of its parents or implements it.
method_exists Checks if the class method exists
property_exists Checks if the object or class has a property
trait_exists Checks if the trait exists

4. 日期/时间

checkdate Validate a Gregorian date
date_add Alias of DateTime::add
date_create_from_format Alias of DateTime::createFromFormat
date_create_immutable_from_format Alias of DateTimeImmutable::createFromFormat
date_create_immutable Alias of DateTimeImmutable::__construct
date_create Alias of DateTime::__construct
date_date_set Alias of DateTime::setDate
date_default_timezone_get Gets the default timezone used by all date/time functions in a script
date_default_timezone_set Sets the default timezone used by all date/time functions in a script
date_diff Alias of DateTime::diff
date_format Alias of DateTime::format
date_get_last_errors Alias of DateTime::getLastErrors
date_interval_create_from_date_string Alias of DateInterval::createFromDateString
date_interval_format Alias of DateInterval::format
date_isodate_set Alias of DateTime::setISODate
date_modify Alias of DateTime::modify
date_offset_get Alias of DateTime::getOffset
date_parse_from_format Get info about given date formatted according to the specified format
date_parse Returns associative array with detailed info about given date
date_sub Alias of DateTime::sub
date_sun_info Returns an array with information about sunset/sunrise and twilight begin/end
date_sunrise Returns time of sunrise for a given day and location
date_sunset Returns time of sunset for a given day and location
date_time_set Alias of DateTime::setTime
date_timestamp_get Alias of DateTime::getTimestamp
date_timestamp_set Alias of DateTime::setTimestamp
date_timezone_get Alias of DateTime::getTimezone
date_timezone_set Alias of DateTime::setTimezone
date Format a local time/date
getdate Get date/time information
gettimeofday Get current time
gmdate Format a GMT/UTC date/time
gmmktime Get Unix timestamp for a GMT date
gmstrftime Format a GMT/UTC time/date according to locale settings
idate Format a local time/date as integer
localtime Get the local time
microtime Return current Unix timestamp with microseconds
mktime Get Unix timestamp for a date
strftime Format a local time/date according to locale settings
strptime Parse a time/date generated with strftime
strtotime Parse about any English textual datetime description into a Unix timestamp
time Return current Unix timestamp
timezone_abbreviations_list Alias of DateTimeZone::listAbbreviations
timezone_identifiers_list Alias of DateTimeZone::listIdentifiers
timezone_location_get Alias of DateTimeZone::getLocation
timezone_name_from_abbr Returns the timezone name from abbreviation
timezone_name_get Alias of DateTimeZone::getName
timezone_offset_get Alias of DateTimeZone::getOffset
timezone_open Alias of DateTimeZone::__construct
timezone_transitions_get Alias of DateTimeZone::getTransitions
timezone_version_get Gets the version of the timezonedb

5. 目录

chdir Change directory
chroot Change the root directory
closedir Close directory handle
dir Return an instance of the Directory class
getcwd Gets the current working directory
opendir Open directory handle
readdir Read entry from directory handle
rewinddir Rewind directory handle
scandir List files and directories inside the specified path

6. 错误处理

debug_backtrace Generates a backtrace
debug_print_backtrace Prints a backtrace
error_clear_last Clear the most recent error
error_get_last Get the last occurred error
error_log Send an error message to the defined error handling routines
error_reporting Sets which PHP errors are reported
restore_error_handler Restores the previous error handler function
restore_exception_handler Restores the previously defined exception handler function
set_error_handler Sets a user-defined error handler function
set_exception_handler Sets a user-defined exception handler function
trigger_error Generates a user-level error/warning/notice message
user_error Alias of trigger_error

7. 程序执行

escapeshellarg Escape a string to be used as a shell argument
escapeshellcmd Escape shell metacharacters
exec Execute an external program
passthru Execute an external program and display raw output
proc_close Close a process opened by proc_open and return the exit code of that process
proc_get_status Get information about a process opened by proc_open
proc_nice Change the priority of the current process
proc_open Execute a command and open file pointers for input/output
proc_terminate Kills a process opened by proc_open
shell_exec Execute command via shell and return the complete output as a string
system Execute an external program and display the output

8. Filesystem

basename Returns trailing name component of path
chgrp Changes file group
chmod Changes file mode
chown Changes file owner
clearstatcache Clears file status cache
copy Copies file
delete See unlink or unset
dirname Returns a parent directory's path
disk_free_space Returns available space on filesystem or disk partition
disk_total_space Returns the total size of a filesystem or disk partition
diskfreespace Alias of disk_free_space
fclose Closes an open file pointer
feof Tests for end-of-file on a file pointer
fflush Flushes the output to a file
fgetc Gets character from file pointer
fgetcsv Gets line from file pointer and parse for CSV fields
fgets Gets line from file pointer
fgetss Gets line from file pointer and strip HTML tags
file_exists Checks whether a file or directory exists
file_get_contents Reads entire file into a string
file_put_contents Write a string to a file
file Reads entire file into an array
fileatime Gets last access time of file
filectime Gets inode change time of file
filegroup Gets file group
fileinode Gets file inode
filemtime Gets file modification time
fileowner Gets file owner
fileperms Gets file permissions
filesize Gets file size
filetype Gets file type
flock Portable advisory file locking
fnmatch Match filename against a pattern
fopen Opens file or URL
fpassthru Output all remaining data on a file pointer
fputcsv Format line as CSV and write to file pointer
fputs Alias of fwrite
fread Binary-safe file read
fscanf Parses input from a file according to a format
fseek Seeks on a file pointer
fstat Gets information about a file using an open file pointer
ftell Returns the current position of the file read/write pointer
ftruncate Truncates a file to a given length
fwrite Binary-safe file write
glob Find pathnames matching a pattern
is_dir Tells whether the filename is a directory
is_executable Tells whether the filename is executable
is_file Tells whether the filename is a regular file
is_link Tells whether the filename is a symbolic link
is_readable Tells whether a file exists and is readable
is_uploaded_file Tells whether the file was uploaded via HTTP POST
is_writable Tells whether the filename is writable
is_writeable Alias of is_writable
lchgrp Changes group ownership of symlink
lchown Changes user ownership of symlink
link Create a hard link
linkinfo Gets information about a link
lstat Gives information about a file or symbolic link
mkdir Makes directory
move_uploaded_file Moves an uploaded file to a new location
parse_ini_file Parse a configuration file
parse_ini_string Parse a configuration string
pathinfo Returns information about a file path
pclose Closes process file pointer
popen Opens process file pointer
readfile Outputs a file
readlink Returns the target of a symbolic link
realpath_cache_get Get realpath cache entries
realpath_cache_size Get realpath cache size
realpath Returns canonicalized absolute pathname
rename Renames a file or directory
rewind Rewind the position of a file pointer
rmdir Removes directory
set_file_buffer Alias of stream_set_write_buffer
stat Gives information about a file
symlink Creates a symbolic link
tempnam Create file with unique file name
tmpfile Creates a temporary file
touch Sets access and modification time of file
umask Changes the current umask
unlink Deletes a file

9. Filter

filter_has_var Checks if variable of specified type exists
filter_id Returns the filter ID belonging to a named filter
filter_input_array Gets external variables and optionally filters them
filter_input Gets a specific external variable by name and optionally filters it
filter_list Returns a list of all supported filters
filter_var_array Gets multiple variables and optionally filters them
filter_var Filters a variable with a specified filter

10. Function Handing

call_user_func_array Call a callback with an array of parameters
call_user_func Call the callback given by the first parameter
create_function Create an anonymous (lambda-style) function
forward_static_call_array Call a static method and pass the arguments as array
forward_static_call Call a static method
func_get_arg Return an item from the argument list
func_get_args Returns an array comprising a function's argument list
func_num_args Returns the number of arguments passed to the function
function_exists Return TRUE if the given function has been defined
get_defined_functions Returns an array of all defined functions
register_shutdown_function Register a function for execution on shutdown
register_tick_function Register a function for execution on each tick
unregister_tick_function De-register a function for execution on each tick

11. Hash

hash_algos Return a list of registered hashing algorithms
hash_copy Copy hashing context
hash_equals Timing attack safe string comparison
hash_file Generate a hash value using the contents of a given file
hash_final Finalize an incremental hash and return resulting digest
hash_hmac_file Generate a keyed hash value using the HMAC method and the contents of a given file
hash_hmac Generate a keyed hash value using the HMAC method
hash_init Initialize an incremental hashing context
hash_pbkdf2 Generate a PBKDF2 key derivation of a supplied password
hash_update_file Pump data into an active hashing context from a file
hash_update_stream Pump data into an active hashing context from an open stream
hash_update Pump data into an active hashing context
hash Generate a hash value (message digest)

12. PHP 选项/信息

assert_options Set/get the various assert flags
assert Checks if assertion is FALSE
cli_get_process_title Returns the current process title
cli_set_process_title Sets the process title
dl Loads a PHP extension at runtime
extension_loaded Find out whether an extension is loaded
gc_collect_cycles Forces collection of any existing garbage cycles
gc_disable Deactivates the circular reference collector
gc_enable Activates the circular reference collector
gc_enabled Returns status of the circular reference collector
gc_mem_caches Reclaims memory used by the Zend Engine memory manager
get_cfg_var Gets the value of a PHP configuration option
get_current_user Gets the name of the owner of the current PHP script
get_defined_constants Returns an associative array with the names of all the constants and their values
get_extension_funcs Returns an array with the names of the functions of a module
get_include_path Gets the current include_path configuration option
get_included_files Returns an array with the names of included or required files
get_loaded_extensions Returns an array with the names of all modules compiled and loaded
get_magic_quotes_gpc Gets the current configuration setting of magic_quotes_gpc
get_magic_quotes_runtime Gets the current active configuration setting of magic_quotes_runtime
get_required_files Alias of get_included_files
get_resources Returns active resources
getenv Gets the value of an environment variable
getlastmod Gets time of last page modification
getmygid Get PHP script owner's GID
getmyinode Gets the inode of the current script
getmypid Gets PHP's process ID
getmyuid Gets PHP script owner's UID
getopt Gets options from the command line argument list
getrusage Gets the current resource usages
ini_alter Alias of ini_set
ini_get_all Gets all configuration options
ini_get Gets the value of a configuration option
ini_restore Restores the value of a configuration option
ini_set Sets the value of a configuration option
magic_quotes_runtime Alias of set_magic_quotes_runtime
main Dummy for main
memory_get_peak_usage Returns the peak of memory allocated by PHP
memory_get_usage Returns the amount of memory allocated to PHP
php_ini_loaded_file Retrieve a path to the loaded php.ini file
php_ini_scanned_files Return a list of .ini files parsed from the additional ini dir
php_logo_guid Gets the logo guid
php_sapi_name Returns the type of interface between web server and PHP
php_uname Returns information about the operating system PHP is running on
phpcredits Prints out the credits for PHP
phpinfo Outputs information about PHP's configuration
phpversion Gets the current PHP version
putenv Sets the value of an environment variable
restore_include_path Restores the value of the include_path configuration option
set_include_path Sets the include_path configuration option
set_magic_quotes_runtime Sets the current active configuration setting of magic_quotes_runtime
set_time_limit Limits the maximum execution time
sys_get_temp_dir Returns directory path used for temporary files
version_compare Compares two "PHP-standardized" version number strings
zend_logo_guid Gets the Zend guid
zend_thread_id Returns a unique identifier for the current thread
zend_version Gets the version of the current Zend engine

13. Mail

14. Math

abs Absolute value
acos Arc cosine
acosh Inverse hyperbolic cosine
asin Arc sine
asinh Inverse hyperbolic sine
atan2 Arc tangent of two variables
atan Arc tangent
atanh Inverse hyperbolic tangent
base_convert Convert a number between arbitrary bases
bindec Binary to decimal
ceil Round fractions up
cos Cosine
cosh Hyperbolic cosine
decbin Decimal to binary
dechex Decimal to hexadecimal
decoct Decimal to octal
deg2rad Converts the number in degrees to the radian equivalent
exp Calculates the exponent of e
expm1 Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
floor Round fractions down
fmod Returns the floating point remainder (modulo) of the division of the arguments
getrandmax Show largest possible random value
hexdec Hexadecimal to decimal
hypot Calculate the length of the hypotenuse of a right-angle triangle
intdiv Integer division
is_finite Finds whether a value is a legal finite number
is_infinite Finds whether a value is infinite
is_nan Finds whether a value is not a number
lcg_value Combined linear congruential generator
log10 Base-10 logarithm
log1p Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero
log Natural logarithm
max Find highest value
min Find lowest value
mt_getrandmax Show largest possible random value
mt_rand Generate a better random value
mt_srand Seed the better random number generator
octdec Octal to decimal
pi Get value of pi
pow Exponential expression
rad2deg Converts the radian number to the equivalent number in degrees
rand Generate a random integer
round Rounds a float
sin Sine
sinh Hyperbolic sine
sqrt Square root
srand Seed the random number generator
tan Tangent
tanh Hyperbolic tangent

15. Misc

connection_aborted Check whether client disconnected
connection_status Returns connection status bitfield
constant Returns the value of a constant
define Defines a named constant
defined Checks whether a given named constant exists
die Equivalent to exit
eval Evaluate a string as PHP code
exit Output a message and terminate the current script
get_browser Tells what the user's browser is capable of
__halt_compiler Halts the compiler execution
highlight_file Syntax highlighting of a file
highlight_string Syntax highlighting of a string
ignore_user_abort Set whether a client disconnect should abort script execution
pack Pack data into binary string
php_check_syntax Check the PHP syntax of (and execute) the specified file
php_strip_whitespace Return source with stripped comments and whitespace
show_source Alias of highlight_file
sleep Delay execution
sys_getloadavg Gets system load average
time_nanosleep Delay for a number of seconds and nanoseconds
time_sleep_until Make the script sleep until the specified time
uniqid Generate a unique ID
unpack Unpack data from binary string
usleep Delay execution in microseconds

16. 网络

checkdnsrr Check DNS records corresponding to a given Internet host name or IP address
closelog Close connection to system logger
define_syslog_variables Initializes all syslog related variables
dns_check_record Alias of checkdnsrr
dns_get_mx Alias of getmxrr
dns_get_record Fetch DNS Resource Records associated with a hostname
fsockopen Open Internet or Unix domain socket connection
gethostbyaddr Get the Internet host name corresponding to a given IP address
gethostbyname Get the IPv4 address corresponding to a given Internet host name
gethostbynamel Get a list of IPv4 addresses corresponding to a given Internet host name
gethostname Gets the host name
getmxrr Get MX records corresponding to a given Internet host name
getprotobyname Get protocol number associated with protocol name
getprotobynumber Get protocol name associated with protocol number
getservbyname Get port number associated with an Internet service and protocol
getservbyport Get Internet service which corresponds to port and protocol
header_register_callback Call a header function
header_remove Remove previously set headers
header Send a raw HTTP header
headers_list Returns a list of response headers sent (or ready to send)
headers_sent Checks if or where headers have been sent
http_response_code Get or Set the HTTP response code
inet_ntop Converts a packed internet address to a human readable representation
inet_pton Converts a human readable IP address to its packed in_addr representation
ip2long Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer
long2ip Converts an long integer address into a string in (IPv4) Internet standard dotted format
openlog Open connection to system logger
pfsockopen Open persistent Internet or Unix domain socket connection
setcookie Send a cookie
setrawcookie Send a cookie without urlencoding the cookie value
socket_get_status Alias of stream_get_meta_data
socket_set_blocking Alias of stream_set_blocking
socket_set_timeout Alias of stream_set_timeout
syslog Generate a system log message

17. 输出控制

flush Flush system output buffer
ob_clean Clean (erase) the output buffer
ob_end_clean Clean (erase) the output buffer and turn off output buffering
ob_end_flush Flush (send) the output buffer and turn off output buffering
ob_flush Flush (send) the output buffer
ob_get_clean Get current buffer contents and delete current output buffer
ob_get_contents Return the contents of the output buffer
ob_get_flush Flush the output buffer, return it as a string and turn off output buffering
ob_get_length Return the length of the output buffer
ob_get_level Return the nesting level of the output buffering mechanism
ob_get_status Get status of output buffers
ob_gzhandler ob_start callback function to gzip output buffer
ob_implicit_flush Turn implicit flush on/off
ob_list_handlers List all output handlers in use
ob_start Turn on output buffering
output_add_rewrite_var Add URL rewriter values
output_reset_rewrite_vars Reset URL rewriter values

18. Password Hashing

password_get_info Returns information about the given hash
password_hash Creates a password hash
password_needs_rehash Checks if the given hash matches the given options
password_verify Verifies that a password matches a hash

19. Session

session_abort Discard session array changes and finish session
session_cache_expire Return current cache expire
session_cache_limiter Get and/or set the current cache limiter
session_commit Alias of session_write_close
session_create_id Create new session id
session_decode Decodes session data from a session encoded string
session_destroy Destroys all data registered to a session
session_encode Encodes the current session data as a session encoded string
session_gc Perform session data garbage collection
session_get_cookie_params Get the session cookie parameters
session_id Get and/or set the current session id
session_is_registered Find out whether a global variable is registered in a session
session_module_name Get and/or set the current session module
session_name Get and/or set the current session name
session_regenerate_id Update the current session id with a newly generated one
session_register_shutdown Session shutdown function
session_register Register one or more global variables with the current session
session_reset Re-initialize session array with original values
session_save_path Get and/or set the current session save path
session_set_cookie_params Set the session cookie parameters
session_set_save_handler Sets user-level session storage functions
session_start Start new or resume existing session
session_status Returns the current session status
session_unregister Unregister a global variable from the current session
session_unset Free all session variables
session_write_close Write session data and end session

20. 反射

21. POSIX Regex

ereg_replace Replace regular expression
ereg Regular expression match
eregi_replace Replace regular expression case insensitive
eregi Case insensitive regular expression match
split Split string into array by regular expression
spliti Split string into array by regular expression case insensitive
sql_regcase Make regular expression for case insensitive matche

22. SPL

class_implements Return the interfaces which are implemented by the given class or interface
class_parents Return the parent classes of the given class
class_uses Return the traits used by the given class
iterator_apply Call a function for every element in an iterator
iterator_count Count the elements in an iterator
iterator_to_array Copy the iterator into an array
spl_autoload_call Try all registered __autoload() function to load the requested class
spl_autoload_extensions Register and return default file extensions for spl_autoload
spl_autoload_functions Return all registered __autoload() functions
spl_autoload_register Register given function as __autoload() implementation
spl_autoload_unregister Unregister given function as __autoload() implementation
spl_autoload Default implementation for __autoload()
spl_classes Return available SPL classes
spl_object_hash Return hash id for given object

23. Streams

set_socket_blocking Alias of stream_set_blocking
stream_bucket_append Append bucket to brigade
stream_bucket_make_writeable Return a bucket object from the brigade for operating on
stream_bucket_new Create a new bucket for use on the current stream
stream_bucket_prepend Prepend bucket to brigade
stream_context_create Creates a stream context
stream_context_get_default Retrieve the default stream context
stream_context_get_options Retrieve options for a stream/wrapper/context
stream_context_get_params Retrieves parameters from a context
stream_context_set_default Set the default stream context
stream_context_set_option Sets an option for a stream/wrapper/context
stream_context_set_params Set parameters for a stream/wrapper/context
stream_copy_to_stream Copies data from one stream to another
stream_encoding Set character set for stream encoding
stream_filter_append Attach a filter to a stream
stream_filter_prepend Attach a filter to a stream
stream_filter_register Register a user defined stream filter
stream_filter_remove Remove a filter from a stream
stream_get_contents Reads remainder of a stream into a string
stream_get_filters Retrieve list of registered filters
stream_get_line Gets line from stream resource up to a given delimiter
stream_get_meta_data Retrieves header/meta data from streams/file pointers
stream_get_transports Retrieve list of registered socket transports
stream_get_wrappers Retrieve list of registered streams
stream_is_local Checks if a stream is a local stream
stream_notification_callback A callback function for the notification context parameter
stream_register_wrapper Alias of stream_wrapper_register
stream_resolve_include_path Resolve filename against the include path
stream_select Runs the equivalent of the select() system call on the given arrays of streams with a timeout specified by tv_sec and tv_usec
stream_set_blocking Set blocking/non-blocking mode on a stream
stream_set_chunk_size Set the stream chunk size
stream_set_read_buffer Set read file buffering on the given stream
stream_set_timeout Set timeout period on a stream
stream_set_write_buffer Sets write file buffering on the given stream
stream_socket_accept Accept a connection on a socket created by stream_socket_server
stream_socket_client Open Internet or Unix domain socket connection
stream_socket_enable_crypto Turns encryption on/off on an already connected socket
stream_socket_get_name Retrieve the name of the local or remote sockets
stream_socket_pair Creates a pair of connected, indistinguishable socket streams
stream_socket_recvfrom Receives data from a socket, connected or not
stream_socket_sendto Sends a message to a socket, whether it is connected or not
stream_socket_server Create an Internet or Unix domain server socket
stream_socket_shutdown Shutdown a full-duplex connection
stream_supports_lock Tells whether the stream supports locking.
stream_wrapper_register Register a URL wrapper implemented as a PHP class
stream_wrapper_restore Restores a previously unregistered built-in wrapper
stream_wrapper_unregister Unregister a URL wrapper

24. Tokenizer

token_get_all Split given source into PHP tokens
token_name Get the symbolic name of a given PHP token

25. URLs

base64_decode Decodes data encoded with MIME base64
base64_encode Encodes data with MIME base64
get_headers Fetches all the headers sent by the server in response to a HTTP request
get_meta_tags Extracts all meta tag content attributes from a file and returns an array
http_build_query Generate URL-encoded query string
parse_url Parse a URL and return its components
rawurldecode Decode URL-encoded strings
rawurlencode URL-encode according to RFC 3986
urldecode Decodes URL-encoded string
urlencode URL-encodes string

26. Variable Handing

boolval Get the boolean value of a variable
debug_zval_dump Dumps a string representation of an internal zend value to output
doubleval Alias of floatval
empty Determine whether a variable is empty
floatval Get float value of a variable
get_defined_vars Returns an array of all defined variables
get_resource_type Returns the resource type
gettype Get the type of a variable
import_request_variables Import GET/POST/Cookie variables into the global scope
intval Get the integer value of a variable
is_array Finds whether a variable is an array
is_bool Finds out whether a variable is a boolean
is_callable Verify that the contents of a variable can be called as a function
is_double Alias of is_float
is_float Finds whether the type of a variable is float
is_int Find whether the type of a variable is integer
is_integer Alias of is_int
is_long Alias of is_int
is_null Finds whether a variable is NULL
is_numeric Finds whether a variable is a number or a numeric string
is_object Finds whether a variable is an object
is_real Alias of is_float
is_resource Finds whether a variable is a resource
is_scalar Finds whether a variable is a scalar
is_string Find whether the type of a variable is string
isset Determine if a variable is set and is not NULL
print_r Prints human-readable information about a variable
serialize Generates a storable representation of a value
settype Set the type of a variable
strval Get string value of a variable
unserialize Creates a PHP value from a stored representation
unset Unset a given variable
var_dump Dumps information about a variable
var_export Outputs or returns a parsable string representation of a variable

2017-02-13-php-function-reference

简介

核心扩展库

1. 字符串

2. 数组

3. 类/对象

4. 日期/时间

5. 目录

6. 错误处理

7. 程序执行

8. Filesystem

9. Filter

10. Function Handing

11. Hash

12. PHP 选项/信息

13. Mail

14. Math

15. Misc

16. 网络

17. 输出控制

18. Password Hashing

19. Session

20. 反射

21. POSIX Regex

22. SPL

23. Streams

24. Tokenizer

25. URLs

26. Variable Handing

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