史上最全的PHP常用函数大全，不看看你就out了（还会不断更新哦！）
| ?紀錄了PHP的一些常用函數和函數代碼！不要錯過了哦。 PHP的一些常用函數 PHP String 函數 PHP Math 函數 PHP Error 和 Logging 函數 PHP Array 函數 PHP Array 函數 |
這下面是一些常用的函數實例哦。以后大家一定能用的上！(本文將不斷更新，同時也希望熱心的網友朋友們能貢獻自己一點一滴的知識，大家共同進步，一起學習)
1、截取UTF-8編碼下字符串的函數
1 /**2 * 截取UTF-8編碼下字符串的函數3 *4 * @param string $str 被截取的字符串5 * @param int $length 截取的長度6 * @param bool $append 是否附加省略號7 *8 * @return string9 */ 10 function sub_str($str, $length = 0, $append = true) 11 { 12 $str = trim($str);//去掉前后的空格 13 $strlength = strlen($str); 14 15 if ($length == 0 || $length >= $strlength) 16 { 17 return $str; 18 } 19 elseif ($length < 0) 20 { 21 $length = $strlength + $length; 22 if ($length < 0) 23 { 24 $length = $strlength; 25 } 26 } 27 28 if (function_exists('mb_substr')) 29 { 30 $newstr = mb_substr($str, 0, $length, EC_CHARSET); 31 } 32 elseif (function_exists('iconv_substr')) 33 { 34 $newstr = iconv_substr($str, 0, $length, EC_CHARSET); 35 } 36 else 37 { 38 //$newstr = trim_right(substr($str, 0, $length)); 39 $newstr = substr($str, 0, $length); 40 } 41 42 if ($append && $str != $newstr) 43 { 44 $newstr .= '...'; 45 } 46 47 return $newstr; 48 } View Code2、獲得用戶的真實IP地址
1 /**2 * 獲得用戶的真實IP地址3 *4 * @access public5 * @return string6 */7 function real_ip()8 {9 static $realip = NULL; 10 11 if ($realip !== NULL) 12 { 13 return $realip; 14 } 15 16 if (isset($_SERVER)) 17 { 18 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) 19 { 20 $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); 21 22 /* 取X-Forwarded-For中第一個非unknown的有效IP字符串 */ 23 foreach ($arr AS $ip) 24 { 25 $ip = trim($ip); 26 27 if ($ip != 'unknown') 28 { 29 $realip = $ip; 30 31 break; 32 } 33 } 34 } 35 elseif (isset($_SERVER['HTTP_CLIENT_IP'])) 36 { 37 $realip = $_SERVER['HTTP_CLIENT_IP']; 38 } 39 else 40 { 41 if (isset($_SERVER['REMOTE_ADDR'])) 42 { 43 $realip = $_SERVER['REMOTE_ADDR']; 44 } 45 else 46 { 47 $realip = '0.0.0.0'; 48 } 49 } 50 } 51 else 52 { 53 if (getenv('HTTP_X_FORWARDED_FOR')) 54 { 55 $realip = getenv('HTTP_X_FORWARDED_FOR'); 56 } 57 elseif (getenv('HTTP_CLIENT_IP')) 58 { 59 $realip = getenv('HTTP_CLIENT_IP'); 60 } 61 else 62 { 63 $realip = getenv('REMOTE_ADDR'); 64 } 65 } 66 67 preg_match("/[\d\.]{7,15}/", $realip, $onlineip); 68 $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0'; 69 70 return $realip; 71 } View Code3、計算字符串的長度(漢字按照兩個字符計算)
1 /**2 * 計算字符串的長度(漢字按照兩個字符計算)3 *4 * @param string $str 字符串5 *6 * @return int7 */8 function str_len($str)9 { 10 $length = strlen(preg_replace('/[\x00-\x7F]/', '', $str)); 11 12 if ($length) 13 { 14 return strlen($str) - $length + intval($length / 3) * 2; 15 } 16 else 17 { 18 return strlen($str); 19 } 20 } View Code4、獲得用戶操作系統的換行符
1 /**2 * 獲得用戶操作系統的換行符3 *4 * @access public5 * @return string6 */7 function get_crlf()8 {9 /* LF (Line Feed, 0x0A, \N) 和 CR(Carriage Return, 0x0D, \R) */ 10 if (stristr($_SERVER['HTTP_USER_AGENT'], 'Win')) 11 { 12 $the_crlf = '\r\n'; 13 } 14 elseif (stristr($_SERVER['HTTP_USER_AGENT'], 'Mac')) 15 { 16 $the_crlf = '\r'; // for old MAC OS 17 } 18 else 19 { 20 $the_crlf = '\n'; 21 } 22 23 return $the_crlf; 24 } View Code5、郵件發送
1 /**2 * 郵件發送3 *4 * @param: $name[string] 接收人姓名5 * @param: $email[string] 接收人郵件地址6 * @param: $subject[string] 郵件標題7 * @param: $content[string] 郵件內容8 * @param: $type[int] 0 普通郵件， 1 HTML郵件9 * @param: $notification[bool] true 要求回執， false 不用回執10 *11 * @return boolean12 */13 function send_mail($name, $email, $subject, $content, $type = 0, $notification=false)14 {15 /* 如果郵件編碼不是EC_CHARSET，創建字符集轉換對象，轉換編碼 */16 if ($GLOBALS['_CFG']['mail_charset'] != EC_CHARSET)17 {18 $name = ecs_iconv(EC_CHARSET, $GLOBALS['_CFG']['mail_charset'], $name);19 $subject = ecs_iconv(EC_CHARSET, $GLOBALS['_CFG']['mail_charset'], $subject);20 $content = ecs_iconv(EC_CHARSET, $GLOBALS['_CFG']['mail_charset'], $content);21 $shop_name = ecs_iconv(EC_CHARSET, $GLOBALS['_CFG']['mail_charset'], $GLOBALS['_CFG']['shop_name']);22 }23 $charset = $GLOBALS['_CFG']['mail_charset'];24 /**25 * 使用mail函數發送郵件26 */27 if ($GLOBALS['_CFG']['mail_service'] == 0 && function_exists('mail'))28 {29 /* 郵件的頭部信息 */30 $content_type = ($type == 0) ? 'Content-Type: text/plain; charset=' . $charset : 'Content-Type: text/html; charset=' . $charset;31 $headers = array();32 $headers[] = 'From: "' . '=?' . $charset . '?B?' . base64_encode($shop_name) . '?='.'" <' . $GLOBALS['_CFG']['smtp_mail'] . '>';33 $headers[] = $content_type . '; format=flowed';34 if ($notification)35 {36 $headers[] = 'Disposition-Notification-To: ' . '=?' . $charset . '?B?' . base64_encode($shop_name) . '?='.'" <' . $GLOBALS['_CFG']['smtp_mail'] . '>';37 }38 39 $res = @mail($email, '=?' . $charset . '?B?' . base64_encode($subject) . '?=', $content, implode("\r\n", $headers));40 41 if (!$res)42 {43 $GLOBALS['err'] ->add($GLOBALS['_LANG']['sendemail_false']);44 45 return false;46 }47 else48 {49 return true;50 }51 }52 /**53 * 使用smtp服務發送郵件54 */55 else56 {57 /* 郵件的頭部信息 */58 $content_type = ($type == 0) ?59 'Content-Type: text/plain; charset=' . $charset : 'Content-Type: text/html; charset=' . $charset;60 $content = base64_encode($content);61 62 $headers = array();63 $headers[] = 'Date: ' . gmdate('D, j M Y H:i:s') . ' +0000';64 $headers[] = 'To: "' . '=?' . $charset . '?B?' . base64_encode($name) . '?=' . '" <' . $email. '>';65 $headers[] = 'From: "' . '=?' . $charset . '?B?' . base64_encode($shop_name) . '?='.'" <' . $GLOBALS['_CFG']['smtp_mail'] . '>';66 $headers[] = 'Subject: ' . '=?' . $charset . '?B?' . base64_encode($subject) . '?=';67 $headers[] = $content_type . '; format=flowed';68 $headers[] = 'Content-Transfer-Encoding: base64';69 $headers[] = 'Content-Disposition: inline';70 if ($notification)71 {72 $headers[] = 'Disposition-Notification-To: ' . '=?' . $charset . '?B?' . base64_encode($shop_name) . '?='.'" <' . $GLOBALS['_CFG']['smtp_mail'] . '>';73 }74 75 /* 獲得郵件服務器的參數設置 */76 $params['host'] = $GLOBALS['_CFG']['smtp_host'];77 $params['port'] = $GLOBALS['_CFG']['smtp_port'];78 $params['user'] = $GLOBALS['_CFG']['smtp_user'];79 $params['pass'] = $GLOBALS['_CFG']['smtp_pass'];80 81 if (empty($params['host']) || empty($params['port']))82 {83 // 如果沒有設置主機和端口直接返回 false84 $GLOBALS['err'] ->add($GLOBALS['_LANG']['smtp_setting_error']);85 86 return false;87 }88 else89 {90 // 發送郵件91 if (!function_exists('fsockopen'))92 {93 //如果fsockopen被禁用，直接返回94 $GLOBALS['err']->add($GLOBALS['_LANG']['disabled_fsockopen']);95 96 return false;97 }98 99 include_once(ROOT_PATH . 'includes/cls_smtp.php'); 100 static $smtp; 101 102 $send_params['recipients'] = $email; 103 $send_params['headers'] = $headers; 104 $send_params['from'] = $GLOBALS['_CFG']['smtp_mail']; 105 $send_params['body'] = $content; 106 107 if (!isset($smtp)) 108 { 109 $smtp = new smtp($params); 110 } 111 112 if ($smtp->connect() && $smtp->send($send_params)) 113 { 114 return true; 115 } 116 else 117 { 118 $err_msg = $smtp->error_msg(); 119 if (empty($err_msg)) 120 { 121 $GLOBALS['err']->add('Unknown Error'); 122 } 123 else 124 { 125 if (strpos($err_msg, 'Failed to connect to server') !== false) 126 { 127 $GLOBALS['err']->add(sprintf($GLOBALS['_LANG']['smtp_connect_failure'], $params['host'] . ':' . $params['port'])); 128 } 129 else if (strpos($err_msg, 'AUTH command failed') !== false) 130 { 131 $GLOBALS['err']->add($GLOBALS['_LANG']['smtp_login_failure']); 132 } 133 elseif (strpos($err_msg, 'bad sequence of commands') !== false) 134 { 135 $GLOBALS['err']->add($GLOBALS['_LANG']['smtp_refuse']); 136 } 137 else 138 { 139 $GLOBALS['err']->add($err_msg); 140 } 141 } 142 143 return false; 144 } 145 } 146 } 147 } View Code6、獲得服務器上的 GD 版本
1 /**2 * 獲得服務器上的 GD 版本3 *4 * @access public5 * @return int 可能的值為0，1，26 */7 function gd_version()8 {9 include_once(ROOT_PATH . 'includes/cls_image.php'); 10 11 return cls_image::gd_version(); 12 } 13 14 if (!function_exists('file_get_contents')) 15 { 16 /** 17 * 如果系統不存在file_get_contents函數則聲明該函數 18 * 19 * @access public 20 * @param string $file 21 * @return mix 22 */ 23 function file_get_contents($file) 24 { 25 if (($fp = @fopen($file, 'rb')) === false) 26 { 27 return false; 28 } 29 else 30 { 31 $fsize = @filesize($file); 32 if ($fsize) 33 { 34 $contents = fread($fp, $fsize); 35 } 36 else 37 { 38 $contents = ''; 39 } 40 fclose($fp); 41 42 return $contents; 43 } 44 } 45 } 46 47 if (!function_exists('file_put_contents')) 48 { 49 define('FILE_APPEND', 'FILE_APPEND'); 50 51 /** 52 * 如果系統不存在file_put_contents函數則聲明該函數 53 * 54 * @access public 55 * @param string $file 56 * @param mix $data 57 * @return int 58 */ 59 function file_put_contents($file, $data, $flags = '') 60 { 61 $contents = (is_array($data)) ? implode('', $data) : $data; 62 63 if ($flags == 'FILE_APPEND') 64 { 65 $mode = 'ab+'; 66 } 67 else 68 { 69 $mode = 'wb'; 70 } 71 72 if (($fp = @fopen($file, $mode)) === false) 73 { 74 return false; 75 } 76 else 77 { 78 $bytes = fwrite($fp, $contents); 79 fclose($fp); 80 81 return $bytes; 82 } 83 } 84 } 85 86 if (!function_exists('floatval')) 87 { 88 /** 89 * 如果系統不存在 floatval 函數則聲明該函數 90 * 91 * @access public 92 * @param mix $n 93 * @return float 94 */ 95 function floatval($n) 96 { 97 return (float) $n; 98 } 99 } View Code7、文件或目錄權限檢查函數
1 /**2 * 文件或目錄權限檢查函數3 *4 * @access public5 * @param string $file_path 文件路徑6 * @param bool $rename_prv 是否在檢查修改權限時檢查執行rename()函數的權限7 *8 * @return int 返回值的取值范圍為{0 <= x <= 15}，每個值表示的含義可由四位二進制數組合推出。9 * 返回值在二進制計數法中，四位由高到低分別代表10 * 可執行rename()函數權限、可對文件追加內容權限、可寫入文件權限、可讀取文件權限。11 */12 function file_mode_info($file_path)13 {14 /* 如果不存在，則不可讀、不可寫、不可改 */15 if (!file_exists($file_path))16 {17 return false;18 }19 20 $mark = 0;21 22 if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN')23 {24 /* 測試文件 */25 $test_file = $file_path . '/cf_test.txt';26 27 /* 如果是目錄 */28 if (is_dir($file_path))29 {30 /* 檢查目錄是否可讀 */31 $dir = @opendir($file_path);32 if ($dir === false)33 {34 return $mark; //如果目錄打開失敗，直接返回目錄不可修改、不可寫、不可讀35 }36 if (@readdir($dir) !== false)37 {38 $mark ^= 1; //目錄可讀 001，目錄不可讀 00039 }40 @closedir($dir);41 42 /* 檢查目錄是否可寫 */43 $fp = @fopen($test_file, 'wb');44 if ($fp === false)45 {46 return $mark; //如果目錄中的文件創建失敗，返回不可寫。47 }48 if (@fwrite($fp, 'directory access testing.') !== false)49 {50 $mark ^= 2; //目錄可寫可讀011，目錄可寫不可讀 01051 }52 @fclose($fp);53 54 @unlink($test_file);55 56 /* 檢查目錄是否可修改 */57 $fp = @fopen($test_file, 'ab+');58 if ($fp === false)59 {60 return $mark;61 }62 if (@fwrite($fp, "modify test.\r\n") !== false)63 {64 $mark ^= 4;65 }66 @fclose($fp);67 68 /* 檢查目錄下是否有執行rename()函數的權限 */69 if (@rename($test_file, $test_file) !== false)70 {71 $mark ^= 8;72 }73 @unlink($test_file);74 }75 /* 如果是文件 */76 elseif (is_file($file_path))77 {78 /* 以讀方式打開 */79 $fp = @fopen($file_path, 'rb');80 if ($fp)81 {82 $mark ^= 1; //可讀 00183 }84 @fclose($fp);85 86 /* 試著修改文件 */87 $fp = @fopen($file_path, 'ab+');88 if ($fp && @fwrite($fp, '') !== false)89 {90 $mark ^= 6; //可修改可寫可讀 111，不可修改可寫可讀011...91 }92 @fclose($fp);93 94 /* 檢查目錄下是否有執行rename()函數的權限 */95 if (@rename($test_file, $test_file) !== false)96 {97 $mark ^= 8;98 }99 } 100 } 101 else 102 { 103 if (@is_readable($file_path)) 104 { 105 $mark ^= 1; 106 } 107 108 if (@is_writable($file_path)) 109 { 110 $mark ^= 14; 111 } 112 } 113 114 return $mark; 115 } 116 117 function log_write($arg, $file = '', $line = '') 118 { 119 if ((DEBUG_MODE & 4) != 4) 120 { 121 return; 122 } 123 124 $str = "\r\n-- ". date('Y-m-d H:i:s'). " --------------------------------------------------------------\r\n"; 125 $str .= "FILE: $file\r\nLINE: $line\r\n"; 126 127 if (is_array($arg)) 128 { 129 $str .= '$arg = array('; 130 foreach ($arg AS $val) 131 { 132 foreach ($val AS $key => $list) 133 { 134 $str .= "'$key' => '$list'\r\n"; 135 } 136 } 137 $str .= ")\r\n"; 138 } 139 else 140 { 141 $str .= $arg; 142 } 143 144 file_put_contents(ROOT_PATH . DATA_DIR . '/log.txt', $str); 145 } View Code8、檢查目標文件夾是否存在，如果不存在則自動創建該目錄
1 /**2 * 檢查目標文件夾是否存在，如果不存在則自動創建該目錄3 *4 * @access public5 * @param string folder 目錄路徑。不能使用相對于網站根目錄的URL6 *7 * @return bool8 */9 function make_dir($folder) 10 { 11 $reval = false; 12 13 if (!file_exists($folder)) 14 { 15 /* 如果目錄不存在則嘗試創建該目錄 */ 16 @umask(0); 17 18 /* 將目錄路徑拆分成數組 */ 19 preg_match_all('/([^\/]*)\/?/i', $folder, $atmp); 20 21 /* 如果第一個字符為/則當作物理路徑處理 */ 22 $base = ($atmp[0][0] == '/') ? '/' : ''; 23 24 /* 遍歷包含路徑信息的數組 */ 25 foreach ($atmp[1] AS $val) 26 { 27 if ('' != $val) 28 { 29 $base .= $val; 30 31 if ('..' == $val || '.' == $val) 32 { 33 /* 如果目錄為.或者..則直接補/繼續下一個循環 */ 34 $base .= '/'; 35 36 continue; 37 } 38 } 39 else 40 { 41 continue; 42 } 43 44 $base .= '/'; 45 46 if (!file_exists($base)) 47 { 48 /* 嘗試創建目錄，如果創建失敗則繼續循環 */ 49 if (@mkdir(rtrim($base, '/'), 0777)) 50 { 51 @chmod($base, 0777); 52 $reval = true; 53 } 54 } 55 } 56 } 57 else 58 { 59 /* 路徑已經存在。返回該路徑是不是一個目錄 */ 60 $reval = is_dir($folder); 61 } 62 63 clearstatcache(); 64 65 return $reval; 66 } View Code9、獲得系統是否啟用了 gzip
1 /**2 * 獲得系統是否啟用了 gzip3 *4 * @access public5 *6 * @return boolean7 */8 function gzip_enabled()9 { 10 static $enabled_gzip = NULL; 11 12 if ($enabled_gzip === NULL) 13 { 14 $enabled_gzip = ($GLOBALS['_CFG']['enable_gzip'] && function_exists('ob_gzhandler')); 15 } 16 17 return $enabled_gzip; 18 } View Code10、遞歸方式的對變量中的特殊字符進行轉義
1 /**2 * 遞歸方式的對變量中的特殊字符進行轉義3 *4 * @access public5 * @param mix $value6 *7 * @return mix8 */9 function addslashes_deep($value) 10 { 11 if (empty($value)) 12 { 13 return $value; 14 } 15 else 16 { 17 return is_array($value) ? array_map('addslashes_deep', $value) : addslashes($value); 18 } 19 } View Code11、將對象成員變量或者數組的特殊字符進行轉
1 /**2 * 將對象成員變量或者數組的特殊字符進行轉義3 *4 * @access public5 * @param mix $obj 對象或者數組6 * @author Xuan Yan7 *8 * @return mix 對象或者數組9 */ 10 function addslashes_deep_obj($obj) 11 { 12 if (is_object($obj) == true) 13 { 14 foreach ($obj AS $key => $val) 15 { 16 $obj->$key = addslashes_deep($val); 17 } 18 } 19 else 20 { 21 $obj = addslashes_deep($obj); 22 } 23 24 return $obj; 25 } View Code12、遞歸方式的對變量中的特殊字符去除轉義
1 /**2 * 遞歸方式的對變量中的特殊字符去除轉義3 *4 * @access public5 * @param mix $value6 *7 * @return mix8 */9 function stripslashes_deep($value) 10 { 11 if (empty($value)) 12 { 13 return $value; 14 } 15 else 16 { 17 return is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); 18 } 19 } View Code13、將一個字串中含有全角的數字字符、字母、空格或'%+-()'字符轉換為相應半角字符
1 /**2 * 將一個字串中含有全角的數字字符、字母、空格或'%+-()'字符轉換為相應半角字符3 *4 * @access public5 * @param string $str 待轉換字串6 *7 * @return string $str 處理后字串8 */9 function make_semiangle($str) 10 { 11 $arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4', 12 '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9', 13 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E', 14 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J', 15 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O', 16 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T', 17 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y', 18 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd', 19 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i', 20 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n', 21 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's', 22 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x', 23 'ｙ' => 'y', 'ｚ' => 'z', 24 '(' => '(', ')' => ')', '〔' => '[', '〕' => ']', '【' => '[', 25 '】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']', 26 '‘' => '[', '’' => ']', '｛' => '{', '｝' => '}', '《' => '<', 27 '》' => '>', 28 '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-', 29 '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.', 30 '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|', 31 '”' => '"', '’' => '`', '‘' => '`', '｜' => '|', '〃' => '"', 32 ' ' => ' '); 33 34 return strtr($str, $arr); 35 } View Code14、?過濾用戶輸入的基本數據，防止script攻擊
1 /**2 * 過濾用戶輸入的基本數據，防止script攻擊3 *4 * @access public5 * @return string6 */7 function compile_str($str)8 {9 $arr = array('<' => '＜', '>' => '＞'); 10 11 return strtr($str, $arr); 12 } View Code15、檢查文件類型
1 /**2 * 檢查文件類型3 *4 * @access public5 * @param string filename 文件名6 * @param string realname 真實文件名7 * @param string limit_ext_types 允許的文件類型8 * @return string9 */10 function check_file_type($filename, $realname = '', $limit_ext_types = '')11 {12 if ($realname)13 {14 $extname = strtolower(substr($realname, strrpos($realname, '.') + 1));15 }16 else17 {18 $extname = strtolower(substr($filename, strrpos($filename, '.') + 1));19 }20 21 if ($limit_ext_types && stristr($limit_ext_types, '|' . $extname . '|') === false)22 {23 return '';24 }25 26 $str = $format = '';27 28 $file = @fopen($filename, 'rb');29 if ($file)30 {31 $str = @fread($file, 0x400); // 讀取前 1024 個字節32 @fclose($file);33 }34 else35 {36 if (stristr($filename, ROOT_PATH) === false)37 {38 if ($extname == 'jpg' || $extname == 'jpeg' || $extname == 'gif' || $extname == 'png' || $extname == 'doc' ||39 $extname == 'xls' || $extname == 'txt' || $extname == 'zip' || $extname == 'rar' || $extname == 'ppt' ||40 $extname == 'pdf' || $extname == 'rm' || $extname == 'mid' || $extname == 'wav' || $extname == 'bmp' ||41 $extname == 'swf' || $extname == 'chm' || $extname == 'sql' || $extname == 'cert'|| $extname == 'pptx' || 42 $extname == 'xlsx' || $extname == 'docx')43 {44 $format = $extname;45 }46 }47 else48 {49 return '';50 }51 }52 53 if ($format == '' && strlen($str) >= 2 )54 {55 if (substr($str, 0, 4) == 'MThd' && $extname != 'txt')56 {57 $format = 'mid';58 }59 elseif (substr($str, 0, 4) == 'RIFF' && $extname == 'wav')60 {61 $format = 'wav';62 }63 elseif (substr($str ,0, 3) == "\xFF\xD8\xFF")64 {65 $format = 'jpg';66 }67 elseif (substr($str ,0, 4) == 'GIF8' && $extname != 'txt')68 {69 $format = 'gif';70 }71 elseif (substr($str ,0, 8) == "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")72 {73 $format = 'png';74 }75 elseif (substr($str ,0, 2) == 'BM' && $extname != 'txt')76 {77 $format = 'bmp';78 }79 elseif ((substr($str ,0, 3) == 'CWS' || substr($str ,0, 3) == 'FWS') && $extname != 'txt')80 {81 $format = 'swf';82 }83 elseif (substr($str ,0, 4) == "\xD0\xCF\x11\xE0")84 { // D0CF11E == DOCFILE == Microsoft Office Document85 if (substr($str,0x200,4) == "\xEC\xA5\xC1\x00" || $extname == 'doc')86 {87 $format = 'doc';88 }89 elseif (substr($str,0x200,2) == "\x09\x08" || $extname == 'xls')90 {91 $format = 'xls';92 } elseif (substr($str,0x200,4) == "\xFD\xFF\xFF\xFF" || $extname == 'ppt')93 {94 $format = 'ppt';95 }96 } elseif (substr($str ,0, 4) == "PK\x03\x04")97 {98 if (substr($str,0x200,4) == "\xEC\xA5\xC1\x00" || $extname == 'docx')99 { 100 $format = 'docx'; 101 } 102 elseif (substr($str,0x200,2) == "\x09\x08" || $extname == 'xlsx') 103 { 104 $format = 'xlsx'; 105 } elseif (substr($str,0x200,4) == "\xFD\xFF\xFF\xFF" || $extname == 'pptx') 106 { 107 $format = 'pptx'; 108 }else 109 { 110 $format = 'zip'; 111 } 112 } elseif (substr($str ,0, 4) == 'Rar!' && $extname != 'txt') 113 { 114 $format = 'rar'; 115 } elseif (substr($str ,0, 4) == "\x25PDF") 116 { 117 $format = 'pdf'; 118 } elseif (substr($str ,0, 3) == "\x30\x82\x0A") 119 { 120 $format = 'cert'; 121 } elseif (substr($str ,0, 4) == 'ITSF' && $extname != 'txt') 122 { 123 $format = 'chm'; 124 } elseif (substr($str ,0, 4) == "\x2ERMF") 125 { 126 $format = 'rm'; 127 } elseif ($extname == 'sql') 128 { 129 $format = 'sql'; 130 } elseif ($extname == 'txt') 131 { 132 $format = 'txt'; 133 } 134 } 135 136 if ($limit_ext_types && stristr($limit_ext_types, '|' . $format . '|') === false) 137 { 138 $format = ''; 139 } 140 141 return $format; 142 } View Code16、對 MYSQL LIKE 的內容進行轉義
1 /**2 * 對 MYSQL LIKE 的內容進行轉義3 *4 * @access public5 * @param string string 內容6 * @return string7 */8 function mysql_like_quote($str)9 { 10 return strtr($str, array("\\\\" => "\\\\\\\\", '_' => '\_', '%' => '\%', "\'" => "\\\\\'")); 11 } View Code17、獲取服務器的ip
1 /**2 * 獲取服務器的ip3 *4 * @access public5 *6 * @return string7 **/8 function real_server_ip()9 { 10 static $serverip = NULL; 11 12 if ($serverip !== NULL) 13 { 14 return $serverip; 15 } 16 17 if (isset($_SERVER)) 18 { 19 if (isset($_SERVER['SERVER_ADDR'])) 20 { 21 $serverip = $_SERVER['SERVER_ADDR']; 22 } 23 else 24 { 25 $serverip = '0.0.0.0'; 26 } 27 } 28 else 29 { 30 $serverip = getenv('SERVER_ADDR'); 31 } 32 33 return $serverip; 34 } View Code18、自定義 header 函數，用于過濾可能出現的安全隱患
1 /**2 * 自定義 header 函數，用于過濾可能出現的安全隱患3 *4 * @param string string 內容5 *6 * @return void7 **/8 function ecs_header($string, $replace = true, $http_response_code = 0)9 {10 if (strpos($string, '../upgrade/index.php') === 0)11 {12 echo '<script type="text/javascript">window.location.href="' . $string . '";</script>';13 }14 $string = str_replace(array("\r", "\n"), array('', ''), $string);15 16 if (preg_match('/^\s*location:/is', $string))17 {18 @header($string . "\n", $replace);19 20 exit();21 }22 23 if (empty($http_response_code) || PHP_VERSION < '4.3')24 {25 @header($string, $replace);26 }27 else28 {29 @header($string, $replace, $http_response_code);30 }31 }32 33 function ecs_iconv($source_lang, $target_lang, $source_string = '')34 {35 static $chs = NULL;36 37 /* 如果字符串為空或者字符串不需要轉換，直接返回 */38 if ($source_lang == $target_lang || $source_string == '' || preg_match("/[\x80-\xFF]+/", $source_string) == 0)39 {40 return $source_string;41 }42 43 if ($chs === NULL)44 {45 require_once(ROOT_PATH . 'includes/cls_iconv.php');46 $chs = new Chinese(ROOT_PATH);47 }48 49 return $chs->Convert($source_lang, $target_lang, $source_string);50 }51 52 function ecs_geoip($ip)53 {54 static $fp = NULL, $offset = array(), $index = NULL;55 56 $ip = gethostbyname($ip);57 $ipdot = explode('.', $ip);58 $ip = pack('N', ip2long($ip));59 60 $ipdot[0] = (int)$ipdot[0];61 $ipdot[1] = (int)$ipdot[1];62 if ($ipdot[0] == 10 || $ipdot[0] == 127 || ($ipdot[0] == 192 && $ipdot[1] == 168) || ($ipdot[0] == 172 && ($ipdot[1] >= 16 && $ipdot[1] <= 31)))63 {64 return 'LAN';65 }66 67 if ($fp === NULL)68 {69 $fp = fopen(ROOT_PATH . 'includes/codetable/ipdata.dat', 'rb');70 if ($fp === false)71 {72 return 'Invalid IP data file';73 }74 $offset = unpack('Nlen', fread($fp, 4));75 if ($offset['len'] < 4)76 {77 return 'Invalid IP data file';78 }79 $index = fread($fp, $offset['len'] - 4);80 }81 82 $length = $offset['len'] - 1028;83 $start = unpack('Vlen', $index[$ipdot[0] * 4] . $index[$ipdot[0] * 4 + 1] . $index[$ipdot[0] * 4 + 2] . $index[$ipdot[0] * 4 + 3]);84 for ($start = $start['len'] * 8 + 1024; $start < $length; $start += 8)85 {86 if ($index{$start} . $index{$start + 1} . $index{$start + 2} . $index{$start + 3} >= $ip)87 {88 $index_offset = unpack('Vlen', $index{$start + 4} . $index{$start + 5} . $index{$start + 6} . "\x0");89 $index_length = unpack('Clen', $index{$start + 7});90 break;91 }92 }93 94 fseek($fp, $offset['len'] + $index_offset['len'] - 1024);95 $area = fread($fp, $index_length['len']);96 97 fclose($fp);98 $fp = NULL;99 100 return $area; 101 } View Code19、去除字符串右側可能出現的亂碼
1 /**2 * 去除字符串右側可能出現的亂碼3 *4 * @param string $str 字符串5 *6 * @return string7 */8 function trim_right($str)9 { 10 $len = strlen($str); 11 /* 為空或單個字符直接返回 */ 12 if ($len == 0 || ord($str{$len-1}) < 127) 13 { 14 return $str; 15 } 16 /* 有前導字符的直接把前導字符去掉 */ 17 if (ord($str{$len-1}) >= 192) 18 { 19 return substr($str, 0, $len-1); 20 } 21 /* 有非獨立的字符，先把非獨立字符去掉，再驗證非獨立的字符是不是一個完整的字，不是連原來前導字符也截取掉 */ 22 $r_len = strlen(rtrim($str, "\x80..\xBF")); 23 if ($r_len == 0 || ord($str{$r_len-1}) < 127) 24 { 25 return sub_str($str, 0, $r_len); 26 } 27 28 $as_num = ord(~$str{$r_len -1}); 29 if ($as_num > (1<<(6 + $r_len - $len))) 30 { 31 return $str; 32 } 33 else 34 { 35 return substr($str, 0, $r_len-1); 36 } 37 } View Code20、將上傳文件轉移到指定位置
1 /**2 * 將上傳文件轉移到指定位置3 *4 * @param string $file_name5 * @param string $target_name6 * @return blog7 */8 function move_upload_file($file_name, $target_name = '')9 { 10 if (function_exists("move_uploaded_file")) 11 { 12 if (move_uploaded_file($file_name, $target_name)) 13 { 14 @chmod($target_name,0755); 15 return true; 16 } 17 else if (copy($file_name, $target_name)) 18 { 19 @chmod($target_name,0755); 20 return true; 21 } 22 } 23 elseif (copy($file_name, $target_name)) 24 { 25 @chmod($target_name,0755); 26 return true; 27 } 28 return false; 29 } View Code21、將JSON傳遞的參數轉碼
1 /**2 * 將JSON傳遞的參數轉碼3 *4 * @param string $str5 * @return string6 */7 function json_str_iconv($str)8 {9 if (EC_CHARSET != 'utf-8') 10 { 11 if (is_string($str)) 12 { 13 return addslashes(stripslashes(ecs_iconv('utf-8', EC_CHARSET, $str))); 14 } 15 elseif (is_array($str)) 16 { 17 foreach ($str as $key => $value) 18 { 19 $str[$key] = json_str_iconv($value); 20 } 21 return $str; 22 } 23 elseif (is_object($str)) 24 { 25 foreach ($str as $key => $value) 26 { 27 $str->$key = json_str_iconv($value); 28 } 29 return $str; 30 } 31 else 32 { 33 return $str; 34 } 35 } 36 return $str; 37 } View Code22、循環轉碼成utf8內容
1 /**2 * 循環轉碼成utf8內容3 *4 * @param string $str5 * @return string6 */7 function to_utf8_iconv($str)8 {9 if (EC_CHARSET != 'utf-8') 10 { 11 if (is_string($str)) 12 { 13 return ecs_iconv(EC_CHARSET, 'utf-8', $str); 14 } 15 elseif (is_array($str)) 16 { 17 foreach ($str as $key => $value) 18 { 19 $str[$key] = to_utf8_iconv($value); 20 } 21 return $str; 22 } 23 elseif (is_object($str)) 24 { 25 foreach ($str as $key => $value) 26 { 27 $str->$key = to_utf8_iconv($value); 28 } 29 return $str; 30 } 31 else 32 { 33 return $str; 34 } 35 } 36 return $str; 37 } View Code23、獲取文件后綴名,并判斷是否合法
1 /**2 * 獲取文件后綴名,并判斷是否合法3 *4 * @param string $file_name5 * @param array $allow_type6 * @return blob7 */8 function get_file_suffix($file_name, $allow_type = array())9 { 10 $file_suffix = strtolower(array_pop(explode('.', $file_name))); 11 if (empty($allow_type)) 12 { 13 return $file_suffix; 14 } 15 else 16 { 17 if (in_array($file_suffix, $allow_type)) 18 { 19 return true; 20 } 21 else 22 { 23 return false; 24 } 25 } 26 } View Code24、?讀結果緩存文件
1 /**2 * 讀結果緩存文件3 *4 * @params string $cache_name5 *6 * @return array $data7 */8 function read_static_cache($cache_name)9 { 10 if ((DEBUG_MODE & 2) == 2) 11 { 12 return false; 13 } 14 static $result = array(); 15 if (!empty($result[$cache_name])) 16 { 17 return $result[$cache_name]; 18 } 19 $cache_file_path = ROOT_PATH . '/temp/static_caches/' . $cache_name . '.php'; 20 if (file_exists($cache_file_path)) 21 { 22 include_once($cache_file_path); 23 $result[$cache_name] = $data; 24 return $result[$cache_name]; 25 } 26 else 27 { 28 return false; 29 } 30 } View Code25、?寫結果緩存文件
1 /**2 * 寫結果緩存文件3 *4 * @params string $cache_name5 * @params string $caches6 *7 * @return8 */9 function write_static_cache($cache_name, $caches) 10 { 11 if ((DEBUG_MODE & 2) == 2) 12 { 13 return false; 14 } 15 $cache_file_path = ROOT_PATH . '/temp/static_caches/' . $cache_name . '.php'; 16 $content = "<?php\r\n"; 17 $content .= "\$data = " . var_export($caches, true) . ";\r\n"; 18 $content .= "?>"; 19 file_put_contents($cache_file_path, $content, LOCK_EX); 20 } View Code總結
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