代码
1 php
2
3 function do_html_header($title)
4 {
5 // print an HTML header
6 ?>
7 <html>
8 <head>
9 <title>php echo $title;?>title>
10 <style>
11 body { font-family: Arial, Helvetica, sans-serif; font-size: 13px }
12 li, td { font-family: Arial, Helvetica, sans-serif; font-size: 13px }
13 hr { color: #3333cc; width=300; text-align=left}
14 a { color: #000000 }
15 style>
16 head>
17 <body>
18 <img src="bookmark.gif" alt="PHPbookmark logo" border=0
19 align=left valign=bottom height = 55 width = 57 />
20 <h1> PHPbookmarkh1>
21 <hr />
22 php
23 if($title)
24 do_html_heading($title);
25 }
26
27 function do_html_footer()
28 {
29 // print an HTML footer
30 ?>
31 body>
32 html>
33 php
34 }
35
36 function do_html_heading($heading)
37 {
38 // print heading
39 ?>
40 <h2>php echo $heading;?>h2>
41 php
42 }
43
44 function do_html_URL($url, $name)
45 {
46 // output URL as link and br
47 ?>
48 <br /><a href="">php echo $name;?>a><br />
49 php
50 }
51
52 function display_site_info()
53 {
54 // display some marketing info
55 ?>
56 <ul>
57 <li>Store your bookmarks online with us!li>
58 <li>See what other users use?li>
59 <li>Share your favorite links with others?li>
60 ul>
61 php
62 }
63
64 function display_login_form()
65 {
66 ?>
67 <a href='register_form.php'>Not a member?a>
68 <form method='post' action='member.php'>
69 <table bgcolor='#cccccc'>
70 <tr>
71 <td colspan=2>Members log in here?td>
72 <tr>
73 <td>Username:td>
74 <td><input type='text' name='username'>td>tr>
75 <tr>
76 <td>Password:td>
77 <td><input type='password' name='passwd'>td>tr>
78 <tr>
79 <td colspan=2 align='center'>
80 <input type='submit' value='Log in'>td>tr>
81 <tr>
82 <td colspan=2><a href='forgot_form.php'>Forgot your password?a>td>
83 tr>
84 table>form>
85 php
86 }
87
88 function display_registration_form()
89 {
90 ?>
91 <form method='post' action='register_new.php'>
92 <table bgcolor='#cccccc'>
93 <tr>
94 <td>Email address:td>
95 <td><input type='text' name='email' size=30 maxlength=100>td>tr>
96 <tr>
97 <td>Preferred username <br />(max 16 chars):td>
98 <td valign='top'><input type='text' name='username'
99 size=16 maxlength=16>td>tr>
100 <tr>
101 <td>Password <br />(between 6 and 16 chars):td>
102 <td valign='top'><input type='password' name='passwd'
103 size=16 maxlength=16>td>tr>
104 <tr>
105 <td>Confirm password:td>
106 <td><input type='password' name='passwd2' size=16 maxlength=16>td>tr>
107 <tr>
108 <td colspan=2 align='center'>
109 <input type='submit' value='Register'>td>tr>
110 table>form>
111 php
112
113 }
114
115 function display_user_urls($url_array)
116 {
117 // display the table of URLs
118
119 // set global variable, so we can test later if this is on the page
120 global $bm_table;
121 $bm_table = true;
122 ?>
123 <br />
124 <form name='bm_table' action='delete_bms.php' method='post'>
125 <table width=300 cellpadding=2 cellspacing=0>
126 php
127 $color = "#cccccc";
128 echo "Bookmark
129 echo "Delete? ";
130 if (is_array($url_array) && count($url_array)>0)
131 {
132 foreach ($url_array as $url)
133 {
134 if ($color == "#cccccc")
135 $color = "#ffffff";
136 else
137 $color = "#cccccc";
138 // remember to call htmlspecialchars() when we are displaying user data
139 echo ""$url\">".htmlspecialchars($url)."
140 echo ""del_me[]\"
141 value=\"$url\">
142 echo "";
143 }
144 }
145 else
146 echo "No bookmarks on record
147 ?>
148 table>
149 form>
150 php
151 }
152
153 function display_user_menu()
154 {
155 // display the menu options on this page
156 ?>
157 <hr />
158 <a href="member.php">Homea> |
159 <a href="add_bm_form.php">Add BMa> |
160 php
161 // only offer the delete option if bookmark table is on this page
162 global $bm_table;
163 if($bm_table==true)
164 echo "Delete BM | ";
165 else
166 echo "Delete BM | ";
167 ?>
168 <a href="change_passwd_form.php">Change passworda>
169 <br />
170 <a href="recommend.php">Recommend URLs to mea> |
171 <a href="logout.php">Logouta>
172 <hr />
173
174 php
175 }
176
177 function display_add_bm_form()
178 {
179 // display the form for people to ener a new bookmark in
180 ?>
181 <form name='bm_table' action='add_bms.php' method='post'>
182 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
183 <tr><td>New BM:td><td><input type='text' name='new_url' value="http://"
184 size=30 maxlength=255>td>tr>
185 <tr><td colspan=2 align='center'><input type='submit' value='Add bookmark'>td>tr>
186 table>
187 form>
188 php
189 }
190
191 function display_password_form()
192 {
193 // display html change password form
194 ?>
195 <br />
196 <form action='change_passwd.php' method='post'>
197 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
198 <tr><td>Old password:td>
199 <td><input type='password' name='old_passwd' size=16 maxlength=16>td>
200 tr>
201 <tr><td>New password:td>
202 <td><input type='password' name='new_passwd' size=16 maxlength=16>td>
203 tr>
204 <tr><td>Repeat new password:td>
205 <td><input type='password' name='new_passwd2' size=16 maxlength=16>td>
206 tr>
207 <tr><td colspan=2 align='center'><input type='submit' value='Change password'>
208 td>tr>
209 table>
210 <br />
211 php
212 };
213
214 function display_forgot_form()
215 {
216 // display HTML form to reset and email password
217 ?>
218 <br />
219 <form action='forgot_passwd.php' method='post'>
220 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
221 <tr><td>Enter your usernametd>
222 <td><input type='text' name='username' size=16 maxlength=16>td>
223 tr>
224 <tr><td colspan=2 align='center'><input type='submit' value='Change password'>
225 td>tr>
226 table>
227 <br />
228 php
229 };
230
231 function display_recommended_urls($url_array)
232 {
233 // similar output to display_user_urls
234 // instead of displaying the users bookmarks, display recomendation
235 ?>
236 &nb#
本代码也确实够长的，但是仔细看看里面的内容其实也没有什么，从介绍语法的角度来说，最好的方法就是选择其中一部分代码。这部分代码足以概括PHP的语法。选哪个为好呢？OK，就选择115行的display_user_urls函数，其代码如下：
1 php
2
3 function do_html_header($title)
4 {
5 // print an HTML header
6 ?>
7 <html>
8 <head>
9 <title>php echo $title;?>title>
10 <style>
11 body { font-family: Arial, Helvetica, sans-serif; font-size: 13px }
12 li, td { font-family: Arial, Helvetica, sans-serif; font-size: 13px }
13 hr { color: #3333cc; width=300; text-align=left}
14 a { color: #000000 }
15 style>
16 head>
17 <body>
18 <img src="bookmark.gif" alt="PHPbookmark logo" border=0
19 align=left valign=bottom height = 55 width = 57 />
20 <h1> PHPbookmarkh1>
21 <hr />
22 php
23 if($title)
24 do_html_heading($title);
25 }
26
27 function do_html_footer()
28 {
29 // print an HTML footer
30 ?>
31 body>
32 html>
33 php
34 }
35
36 function do_html_heading($heading)
37 {
38 // print heading
39 ?>
40 <h2>php echo $heading;?>h2>
41 php
42 }
43
44 function do_html_URL($url, $name)
45 {
46 // output URL as link and br
47 ?>
48 <br /><a href="">php echo $name;?>a><br />
49 php
50 }
51
52 function display_site_info()
53 {
54 // display some marketing info
55 ?>
56 <ul>
57 <li>Store your bookmarks online with us!li>
58 <li>See what other users use?li>
59 <li>Share your favorite links with others?li>
60 ul>
61 php
62 }
63
64 function display_login_form()
65 {
66 ?>
67 <a href='register_form.php'>Not a member?a>
68 <form method='post' action='member.php'>
69 <table bgcolor='#cccccc'>
70 <tr>
71 <td colspan=2>Members log in here?td>
72 <tr>
73 <td>Username:td>
74 <td><input type='text' name='username'>td>tr>
75 <tr>
76 <td>Password:td>
77 <td><input type='password' name='passwd'>td>tr>
78 <tr>
79 <td colspan=2 align='center'>
80 <input type='submit' value='Log in'>td>tr>
81 <tr>
82 <td colspan=2><a href='forgot_form.php'>Forgot your password?a>td>
83 tr>
84 table>form>
85 php
86 }
87
88 function display_registration_form()
89 {
90 ?>
91 <form method='post' action='register_new.php'>
92 <table bgcolor='#cccccc'>
93 <tr>
94 <td>Email address:td>
95 <td><input type='text' name='email' size=30 maxlength=100>td>tr>
96 <tr>
97 <td>Preferred username <br />(max 16 chars):td>
98 <td valign='top'><input type='text' name='username'
99 size=16 maxlength=16>td>tr>
100 <tr>
101 <td>Password <br />(between 6 and 16 chars):td>
102 <td valign='top'><input type='password' name='passwd'
103 size=16 maxlength=16>td>tr>
104 <tr>
105 <td>Confirm password:td>
106 <td><input type='password' name='passwd2' size=16 maxlength=16>td>tr>
107 <tr>
108 <td colspan=2 align='center'>
109 <input type='submit' value='Register'>td>tr>
110 table>form>
111 php
112
113 }
114
115 function display_user_urls($url_array)
116 {
117 // display the table of URLs
118
119 // set global variable, so we can test later if this is on the page
120 global $bm_table;
121 $bm_table = true;
122 ?>
123 <br />
124 <form name='bm_table' action='delete_bms.php' method='post'>
125 <table width=300 cellpadding=2 cellspacing=0>
126 php
127 $color = "#cccccc";
128 echo "
129 echo "
130 if (is_array($url_array) && count($url_array)>0)
131 {
132 foreach ($url_array as $url)
133 {
134 if ($color == "#cccccc")
135 $color = "#ffffff";
136 else
137 $color = "#cccccc";
138 // remember to call htmlspecialchars() when we are displaying user data
139 echo "
140 echo "
141 value=\"$url\">
142 echo "";
143 }
144 }
145 else
146 echo "
147 ?>
148 table>
149 form>
150 php
151 }
152
153 function display_user_menu()
154 {
155 // display the menu options on this page
156 ?>
157 <hr />
158 <a href="member.php">Homea> |
159 <a href="add_bm_form.php">Add BMa> |
160 php
161 // only offer the delete option if bookmark table is on this page
162 global $bm_table;
163 if($bm_table==true)
164 echo "
165 else
166 echo "
167 ?>
168 <a href="change_passwd_form.php">Change passworda>
169 <br />
170 <a href="recommend.php">Recommend URLs to mea> |
171 <a href="logout.php">Logouta>
172 <hr />
173
174 php
175 }
176
177 function display_add_bm_form()
178 {
179 // display the form for people to ener a new bookmark in
180 ?>
181 <form name='bm_table' action='add_bms.php' method='post'>
182 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
183 <tr><td>New BM:td><td><input type='text' name='new_url' value="http://"
184 size=30 maxlength=255>td>tr>
185 <tr><td colspan=2 align='center'><input type='submit' value='Add bookmark'>td>tr>
186 table>
187 form>
188 php
189 }
190
191 function display_password_form()
192 {
193 // display html change password form
194 ?>
195 <br />
196 <form action='change_passwd.php' method='post'>
197 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
198 <tr><td>Old password:td>
199 <td><input type='password' name='old_passwd' size=16 maxlength=16>td>
200 tr>
201 <tr><td>New password:td>
202 <td><input type='password' name='new_passwd' size=16 maxlength=16>td>
203 tr>
204 <tr><td>Repeat new password:td>
205 <td><input type='password' name='new_passwd2' size=16 maxlength=16>td>
206 tr>
207 <tr><td colspan=2 align='center'><input type='submit' value='Change password'>
208 td>tr>
209 table>
210 <br />
211 php
212 };
213
214 function display_forgot_form()
215 {
216 // display HTML form to reset and email password
217 ?>
218 <br />
219 <form action='forgot_passwd.php' method='post'>
220 <table width=250 cellpadding=2 cellspacing=0 bgcolor='#cccccc'>
221 <tr><td>Enter your usernametd>
222 <td><input type='text' name='username' size=16 maxlength=16>td>
223 tr>
224 <tr><td colspan=2 align='center'><input type='submit' value='Change password'>
225 td>tr>
226 table>
227 <br />
228 php
229 };
230
231 function display_recommended_urls($url_array)
232 {
233 // similar output to display_user_urls
234 // instead of displaying the users bookmarks, display recomendation
235 ?>
236 &nb#
1
function
display_user_urls(
$url_array
)
2 {
3 // display the table of URLs
4
5 // set global variable, so we can test later if this is on the page
6 global $bm_table ;
7 $bm_table = true ;
8 ?>
9 < br />
10 < form name = ' bm_table ' action = ' delete_bms.php ' method = ' post ' >
11 < table width = 300 cellpadding = 2 cellspacing = 0 >
12 php
13 $color = " #cccccc " ;
14 echo "Bookmark
15 echo "Delete?
"
;
16 if ( is_array ( $url_array ) && count ( $url_array ) > 0 )
17 {
18 foreach ( $url_array as $url )
19 {
20 if ( $color == " #cccccc " )
21 $color = " #ffffff " ;
22 else
23 $color = " #cccccc " ;
24 // remember to call htmlspecialchars() when we are displaying user data
25 echo "
"
$url
\
"
>
"
.
htmlspecialchars
(
$url
)
.
"
26 echo "
"
del_me[]\
"
27 value=\ " $url \ " >
28 echo " " ;
29 }
30 }
31 else
32 echo "No bookmarks on record
33 ?>
34 table >
35 form >
36 php
37 }
OK，下面的描述将以本代码段的行号为准。此函数用来显示书签信息的。传入的参数是书签的数组。
2 {
3 // display the table of URLs
4
5 // set global variable, so we can test later if this is on the page
6 global $bm_table ;
7 $bm_table = true ;
8 ?>
9 < br />
10 < form name = ' bm_table ' action = ' delete_bms.php ' method = ' post ' >
11 < table width = 300 cellpadding = 2 cellspacing = 0 >
12 php
13 $color = " #cccccc " ;
14 echo "
15 echo "
16 if ( is_array ( $url_array ) && count ( $url_array ) > 0 )
17 {
18 foreach ( $url_array as $url )
19 {
20 if ( $color == " #cccccc " )
21 $color = " #ffffff " ;
22 else
23 $color = " #cccccc " ;
24 // remember to call htmlspecialchars() when we are displaying user data
25 echo "
26 echo "
27 value=\ " $url \ " >
28 echo " " ;
29 }
30 }
31 else
32 echo "
33 ?>
34 table >
35 form >
36 php
37 }
看看上面的代码。我将从以下几个方面入手
- PHP的基本类型
- 如何定义PHP的变量和常量
- PHP的运算符
- PHP的表达式
- PHP的流程控制
- PHP的函数
OK，说完了上面的PHP介绍，再看看上面的代码，是不是觉得很easy。要是仍然觉得有点晕，请原谅我的表达。你也可以和我联系，改进一下它们。嘿嘿。
让我们继续解释上面的内容吧。
先看第一行，
function
display_user_urls(
$url_array
)
它是用来定义一个函数，因为前面有关键字function，参数是一个URL的数组。
看看第6行，定义了一个全局变量 $bm_table，并设置为true。
第10，11行为
10
<
form name
=
'
bm_table
'
action
=
'
delete_bms.php
'
method
=
'
post
'
>
11 < table width = 300 cellpadding = 2 cellspacing = 0 >
它定义了一个form，在form里包含一个表。这个表用来显示书签的。接着看，14，15用来显示表的Title的。背景色为
"
#cccccc
"
;字体为粗体。这里你可以看到
11 < table width = 300 cellpadding = 2 cellspacing = 0 >
<
tr bgcolor
=
'
$color
'
>
$color是一个变量，在我们上面说的字符串的操作里，如何显示一个字符串以及显示字符串的规则－－PHP会尽可能的识别变量，在这里就有体现。
看看判断语句
16
if
(
is_array
(
$url_array
)
&&
count
(
$url_array
)
>
0
)
is_array判断
$url_array
是否为数组。
count获取
$url_array
数组的个数。
18行的代码
18
foreach
(
$url_array
as
$url
)
遍历数组的每个值，然后显示在Table里。
需要注意的是这里调用了 htmlspecialchars 函数，此函数用来处理用户数据里的HTML特殊字符。
最后看看显示的效果吧。
