php 函数摘录（mainly from wordpress and php manual）--持续更新
wordpress functions：
1.深度替换（拿替换后的结果再次替换）
1 /**
2 * Perform a deep string replace operation to ensure the values in $search are no longer present
3 *
4 * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values
5 * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that
6 * str_replace would return
7 *
8 * @since 2.8.1
9 * @access private
10 *
11 * @param string|array $search
12 * @param string $subject
13 * @return string The processed string
14 */
15 function _deep_replace( $search, $subject ) {
16 $found = true;
17 $subject = (string) $subject;
18 while ( $found ) {
19 $found = false;
20 foreach ( (array) $search as $val ) {
21 while ( strpos( $subject, $val ) !== false ) {
22 $found = true;
23 $subject = str_replace( $val, '', $subject );
24 }
25 }
26 }
27
28 return $subject;
29 }
2.vars.php
检测浏览器
1 // Simple browser detection 2 $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false; 3 4 if ( isset($_SERVER['HTTP_USER_AGENT']) ) { 5 if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) { 6 $is_lynx = true; 7 } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) { 8 if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) { 9 if ( $is_chrome = apply_filters( 'use_google_chrome_frame', is_admin() ) ) 10 header( 'X-UA-Compatible: chrome=1' ); 11 $is_winIE = ! $is_chrome; 12 } else { 13 $is_chrome = true; 14 } 15 } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) { 16 $is_safari = true; 17 } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) { 18 $is_gecko = true; 19 } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) { 20 $is_winIE = true; 21 } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) { 22 $is_macIE = true; 23 } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) { 24 $is_opera = true; 25 } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) { 26 $is_NS4 = true; 27 } 28 } 29 30 if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false ) 31 $is_iphone = true; 32 33 $is_IE = ( $is_macIE || $is_winIE );
3.检测服务器
1 // Server detection 2 3 /** 4 * Whether the server software is Apache or something else 5 * @global bool $is_apache 6 */ 7 $is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false); 8 9 /** 10 * Whether the server software is IIS or something else 11 * @global bool $is_IIS 12 */ 13 $is_IIS = !$is_apache && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false); 14 15 /** 16 * Whether the server software is IIS 7.X 17 * @global bool $is_iis7 18 */ 19 $is_iis7 = $is_IIS && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7.') !== false);
php manual functions：
1.深度去除反斜线（json string）
1 <?php
2 function stripslashes_deep(&$value)
3 {
4 $value = is_array($value) ?
5 array_map('stripslashes_deep', $value) :
6 stripslashes($value);
7
8 return $value;
9 }
10 ?>
2.转义字符串，用于sql
1 <?php
2 function conditional_escape ($str)
3 {
4 /* Automatic escaping is highly deprecated, but many sites do it
5 anyway to protect themselves from stupid customers. */
6 if (get_magic_quotes_gpc())
7 {
8 /* Apache automatically escaped the string already. */
9 return $str;
10 }
11 /* Replace the following line with whatever function you prefer
12 to call to escape a string. */
13 return mysqli_real_escape_string ($link, $str);
14 }
15 ?>
