<?php/** * 加密解密* * @param string $key* @param string $string* @param string $decrypt* @return string */ function encryptDecrypt($key, $string, $decrypt) {if($decrypt){$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12");return $decrypted;}else{$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));return $encrypted;} }function generateRandomString($length = 10) {$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';$randomString = '';for ($i = 0; $i < $length; $i++) {$randomString .= $characters[rand(0, strlen($characters) - 1)];}return $randomString; }/** * 獲取擴展名* @param string $filename * @return string */ function getExtension($filename) {$ext = substr($filename, strrpos($filename, '.'));return str_replace('.','',$ext); }function formatSize($size) {$sizes = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB");if ($size == 0) { return('n/a'); } else {return (round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) . $sizes[$i]); } }function stringParser($string,$replacer) {$result = str_replace(array_keys($replacer), array_values($replacer),$string);return $result; }function listDirFiles($DirPath) {if($dir = opendir($DirPath)){while(($file = readdir($dir))!== false){if(!is_dir($DirPath.$file)) {echo "filename: $file<br />";}}} }function curPageURL() {$pageURL = 'http';if (!empty($_SERVER['HTTPS'])) {$pageURL .= "s";}$pageURL .= "://";if ($_SERVER["SERVER_PORT"] != "80") {$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];} else {$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];}return $pageURL; }function download($filename) {if ((isset($filename))&&(file_exists($filename))){header("Content-length: ".filesize($filename));header('Content-Type: application/octet-stream');header('Content-Disposition: attachment; filename="' . $filename . '"');readfile("$filename");} else {echo "Looks like file does not exist!";} }/** * 獲取IP地址 * * @return string */ function getIp() {if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")){$ip = getenv("HTTP_CLIENT_IP");}elseif (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")){$ip = getenv("HTTP_X_FORWARDED_FOR");}elseif (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")){$ip = getenv("REMOTE_ADDR");}elseif (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")){$ip = $_SERVER['REMOTE_ADDR'];}else$ip = "unknown";return ($ip); }function injCheck($sql_str) { $check = preg_match('/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile/', $sql_str);if ($check) {echo 'Illegal char';exit;} else {return $sql_str;} }/** * 是否是手機號碼 * * @param string $phone 手機號碼 * @return boolean */ function isPhone($phone) { if (strlen ( $phone ) != 11 || ! preg_match ( '/^1[3|4|5|8][0-9]\d{4,8}$/', $phone )) { return false; } else { return true; } } /** * 驗證字符串是否為數字,字母,中文和下劃線構成 * @param string $username * @return bool */ function isString($str){ if(preg_match('/^[\x{4e00}-\x{9fa5}\w_]+$/u',$str)){ return true; }else{ return false; } } /** * 是否為一個合法的email * @param sting $email * @return boolean */ function isEmail($email){ if (filter_var ($email, FILTER_VALIDATE_EMAIL )) { return true; } else { return false; } } /** * 是否為一個合法的url * @param string $url * @return boolean */ function isUrl($url){ if (filter_var ($url, FILTER_VALIDATE_URL )) { return true; } else { return false; } } /** * 是否為一個合法的ip地址 * @param string $ip * @return boolean */ function isIp($ip){ if (ip2long($ip)) { return true; } else { return false; } } /** * 是否為整數 * @param int $number * @return boolean */ function isNnumber($number){ if(preg_match('/^[-\+]?\d+$/',$number)){ return true; }else{ return false; } } /** * 是否為正整數 * @param int $number * @return boolean */ function isPositiveNumber($number){ if(ctype_digit ($number)){ return true; }else{ return false; } } /** * 是否為小數 * @param float $number * @return boolean */ function isDecimal($number){ if(preg_match('/^[-\+]?\d+(\.\d+)?$/',$number)){ return true; }else{ return false; } } /** * 是否為正小數 * @param float $number * @return boolean */ function isPositiveDecimal($number){ if(preg_match('/^\d+(\.\d+)?$/',$number)){ return true; }else{ return false; } } /** * 是否為英文 * @param string $str * @return boolean */ function isEnglish($str){ if(ctype_alpha($str)) return true; else return false; } /** * 是否為中文 * @param string $str * @return boolean */ function isChinese($str){ if(preg_match('/^[\x{4e00}-\x{9fa5}]+$/u',$str)) return true; else return false; } /** * 判斷是否為圖片 * @param string $file 圖片文件路徑 * @return boolean */ function isImage($file){ if(file_exists($file) && getimagesize($file===false)){ return false; }else{ return true; } } /** * 是否為合法的身份證(支持15位和18位) * @param string $card * @return boolean */ function isCard($card){ if(preg_match('/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/',$card) ||preg_match('/^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$/',$card)) return true; else return false; }/** * 驗證日期格式是否正確 * @param string $date * @param string $format * @return boolean */ function isDate($date,$format='Y-m-d'){ $t=date_parse_from_format($format,$date); if(empty($t['errors'])){ return true; }else{ return false; } }

?

轉載于:https://www.cnblogs.com/chenpingzhao/p/4802287.html

總結

以上是生活随笔為你收集整理的PHP中一些有用的函数的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。