'DB_HOST' => 'localhost',
'DB_NAME' => 'blog',
'DB_USER' => 'root',
'DB_PWD' => '',
];
?>
link = $this->connect();
}
/**
* 数据库连接
*/
public function connect()
{
$link = mysqli_connect(DB_HOST, DB_USER, DB_PWD);
if (!$link) {
die('连接数据库失败');
}
mysqli_select_db($link, DB_NAME);
mysqli_set_charset($link, 'utf8');
return $link;
}
/**
* @param $msg
*/
public function log($msg)
{
$logDir = './logs/';
if (!file_exists($logDir)) {
$logDir = mkdir($logDir, 0777, true);
}
$logfile = date('Y-m-d') . '.log';
$logPath = $logDir . '/' . $logfile;
error_log(date('H:i:s') . '--' . substr(microtime(), 2, 6) . '--' . $msg . PHP_EOL, 3, $logPath);
// file_put_contents($logPath, date('H:i:s') . '--' . substr(microtime(), 2, 6) . '--' . $msg . PHP_EOL, FILE_APPEND);
}
}
/**
* Class sql_func 数据库方法类
*/
class sql_func extends Sql
{
protected $options;//存放mysql方法的数组
protected $sql;//sql语句
protected $tableName;//表名
/**
* 继承父类中的construct方法
* sql_func constructor.
*/
public function __construct()
{
parent::__construct();
$this->initOptions();
}
public function log($msg)
{
parent::log($msg);
}
/**
* 外部调用受保护属性时间触发的方法
* @param $name
*/
public function __get($name)
{
if ('sql' == $name) {
$this->sql = $name;
}
}
/**
* 清空数组options中的值
*/
protected function initOptions()
{
$array = ['table', 'field', 'where', 'group', 'order', 'having', 'limit'];
foreach ($array AS $value) {
$this->options[$value] = '';
if ('table' == $value) {
$this->options[$value] = $this->tableName;
}
}
}
/**
* 获取table的方法
* @param (string)$table
* @return mixed
*/
public function table($table)
{
if (!empty($table)) {
$this->options['table'] = $table;
}
return $this;
}
/**
* function field
* @param (string)$field
* @return mixed
*/
public function field($field='')
{
if (!empty($field)) {
if (is_string($field)) {
$this->options['field'] = $field;
} else if (is_array($field)) {
$this->options['field'] = join(',',$field);
}
} else {
$this->options['field'] = '*';
}
return $this;
}
/**
* where 方法
* @param mixed $where
* @return $this
*/
public function where($where)
{
if (!empty($where)) {
if (is_string($where)) {
$this->options['where'] = 'WHERE ' . $where;
} else if (is_array($where)) {
$where = $this->parseValue($where);
$data = '';
foreach ($where AS $key => $value) {
if ('' === $data) {
$data .= $key . '=' . $value . ' ';
} else {
$data .= 'AND ' . $key . '=' . $value . ' ';
}
}
$this->options['where'] = 'WHERE ' . $data;
}
}
return $this;
}
/**
* group 方法（根据（）分组）
* @param string $group
* @return $this
*/
public function group($group)
{
if (!empty($group)) {
$this->options['group'] = 'GROUP BY ' . $group;
}
return $this;
}
/**
* order 方法（order by () desc/asc）
* @param string $order
* @return $this
*/
public function order($order)
{
if (!empty($order)) {
$this->options['order'] = 'ORDER BY ' . $order;
}
return $this;
}
/**
* having 方法
* @param string $having
* @return $this
*/
public function having($having)
{
if (!empty($having)) {
$this->options['having'] = 'HAVING ' . $having;
}
return $this;
}
/**
* limit 方法
* @param array $limit
* @return $this
*/
public function limit($limit)
{
if (!empty($limit)) {
// $this->options['limit'] = 'LIMIT ' . join(',', $limit);
if (is_string($limit)) {
$this->options['limit'] = 'LIMIT ' . $limit;
} else if (is_array($limit)) {
$this->options['limit'] = 'LIMIT ' . join(',', $limit);
}
}
return $this;
}
/**
* select 方法
* @return array
*/
public function select($is_one = false)
{
if (empty($this->options['field'])) {
$this->options['field'] = '*';
}
$sql = 'SELECT %FIELD% FROM %TABLE% %HAVING% %GROUP% %ORDER% %WHERE% %LIMIT%';
$sql = str_replace(['%FIELD%', '%TABLE%', '%HAVING%', '%GROUP%', '%ORDER%', '%WHERE%', '%LIMIT%'], [$this->options['field'], $this->options['table'], $this->options['having'], $this->options['group'], $this->options['order'], $this->options['where'], $this->options['limit']], $sql);
$this->sql = $sql;
return $this->query($sql);
// $row = [];
// while ($res = mysqli_fetch_assoc($tmp)) {
//
// $row[] = $res;
// }
// if ($is_one) {
// return $row[0];
// }
// return $row;
}
/**
* insert 方法
* @param array $data
* @return array
*/
public function insert($data)
{
$data = $this->parseValue($data);
$keys = array_keys($data);
$values = array_values($data);
$sql = 'INSERT INTO %TABLE%(%FIELD%) values(%VALUES%)';
$sql = str_replace(['%TABLE%', '%FIELD%', '%VALUES%'], [$this->options['table'], join(',', $keys), join(',', $values)], $sql);
$this->sql = $sql;
return $this->exec($sql);
}
/**
* delete 方法
* @return mixed
*/
public function delete()
{
$sql = 'DELETE FROM %TABLE% %WHERE%';
$sql = str_replace(['%TABLE%', '%WHERE%'], [$this->options['table'], $this->options['where']], $sql);
$this->sql = $sql;
return $this->exec($sql);
}
/**
* updata 方法
* @param array $data
* @return mixed
*/
public function update($data)
{
$data = $this->parseValue($data);
$value = $this->parseUpdate($data);
$sql = 'UPDATE %TABLE% SET %VALUE% %WHERE%';
$sql = str_replace(['%TABLE%', '%VALUE%', '%WHERE%'], [$this->options['table'], $value, $this->options['where']], $sql);
$this->sql = $sql;
return $this->exec($sql);
}
/**
*将数组拼接成固定格式
* @param array $data
* @return string
*/
protected function parseUpdate($data)
{
foreach ($data AS $key=>$value) {
$newData[] = $key . '=' . $value;
}
return join(',', $newData);
}
/**
*给数组中值为字符串的加引号
* @param array $data
* @return array
*/
protected function parseValue($data)
{
$newData = [];
foreach ($data AS $key=>$value)
{
if (is_string($value)) {
$value = '"' . $value . '"';
}
$newData[$key] = $value;
}
return $newData;
}
/**
* query 方法
* @param (string)$sql
* @return array
*/
public function query($sql)
{
$log = '查询失败';
$this->log($log);
$this->initOptions();//清空数组中的值
$res = mysqli_query($this->link, $sql);
if (false !== $res) {
$row = $res->fetch_all(MYSQLI_ASSOC);
return $row;
} else {
var_dump(mysqli_error($this->link));
die('查询失败');
}
}
/**
* function exec
* @param $sql
* @return mixed
*/
public function exec($sql)
{
$log = '操作失败';
$this->log($log);
$this->initOptions();
$res = mysqli_query($this->link, $sql);
if (false === $res) {
var_dump(mysqli_error($this->link));
return false;
} else {
return mysqli_affected_rows($this->link);
}
}
}
