分享自定义的几个PHP功能函数_php实例
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2022-04-29 15:26:30
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最近不是在折腾论坛嘛,各种类各种函数,原创一些,从别人那儿qiang过来一些,在此分享出来,希望有朋友能用的到~
注意:部分函数可能不够完善,由此造成的漏洞风险自担~
提交过滤
function filter($text) { //完全过滤注释 $text = preg_replace('//', '', $text); //完全过滤js $text = preg_replace('/
提交过滤2
function stripslashes_array(&$array) { while (list($key, $var) = each($array)) { if ($key != 'argc' && $key != 'argv' && (strtoupper($key) != $key || '' . intval($key) == "$key")) { if (is_string($var)) { $array[$key] = stripslashes($var); } if (is_array($var)) { $array[$key] = stripslashes_array($var); } } } return $array; }
字符串截取(这个是emlog里提出来的,其实也就是substr的增强版)
function subString($strings, $start, $length) { if (function_exists('mb_substr') && function_exists('mb_strlen')) { $sub_str = mb_substr($strings, $start, $length, 'utf8'); return mb_strlen($sub_str, 'utf8') = 128) $char++; } $str2 = substr($strings, $start, $length + 1); $str3 = substr($strings, $start, $length + 2); if ($char % 3 == 1) { if ($length
IP地址匿名化(最后一位替换为星号)
function AnonymousIP() { $ip = GetIP(); if ($ip == "Unknown") { $removed_ip = "未知用户"; } if (strpos($ip, ":")) { $removed_ip = "IPv6用户"; } else { $reg1 = '/((?:\d+\.){3})\d+/'; $reg2 = '~(\d+)\.(\d+)\.(\d+)\.(\d+)~'; $removed_ip = preg_replace($reg1, "\\1*", $ip); } return $removed_ip; }
获取客户端IP地址
function GetIP() { if (@$_SERVER["HTTP_X_FORWARDED_FOR"]) $ip = $_SERVER["HTTP_X_FORWARDED_FOR"]; else if (@$_SERVER["HTTP_CLIENT_IP"]) $ip = $_SERVER["HTTP_CLIENT_IP"]; else if (@$_SERVER["REMOTE_ADDR"]) $ip = $_SERVER["REMOTE_ADDR"]; else if (@getenv("HTTP_X_FORWARDED_FOR")) $ip = getenv("HTTP_X_FORWARDED_FOR"); else if (@getenv("HTTP_CLIENT_IP")) $ip = getenv("HTTP_CLIENT_IP"); else if (@getenv("REMOTE_ADDR")) $ip = getenv("REMOTE_ADDR"); else $ip = "Unknown"; return $ip; }
字符串加密(支持中文)
function dencrypt($string, $isEncrypt = true, $key = "youdian") { if (!isset($string{0}) || !isset($key{0})) { return false; } $dynKey = $isEncrypt ? hash('sha1', microtime(true)) : substr($string, 0, 40); $fixedKey = hash('sha1', $key); $dynKeyPart1 = substr($dynKey, 0, 20); $dynKeyPart2 = substr($dynKey, 20); $fixedKeyPart1 = substr($fixedKey, 0, 20); $fixedKeyPart2 = substr($fixedKey, 20); $key = hash('sha1', $dynKeyPart1 . $fixedKeyPart1 . $dynKeyPart2 . $fixedKeyPart2); $string = $isEncrypt ? $fixedKeyPart1 . $string . $dynKeyPart2 : (isset($string{339}) ? gzuncompress(base64_decode(substr($string, 40))) : base64_decode(substr($string, 40))); $n = 0; $result = ''; $len = strlen($string); for ($n = 0; $n 299 ? gzcompress($result) : $result)) : substr($result, 20, -20); }
检查字符串是否包含中文
function CheckChinese($string) { if (preg_match("/[\x7f-\xff]/", $string)) { return true; } else { return false; } }
隐藏文件真实路径
function FileHeaderJump($file) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename=' . basename($file)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: ' . filesize($file)); ob_clean(); flush(); readfile($file); exit; }
生成随机字符串,自定义长度
function CreateRandomString($length) { $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; $password = ""; for ($i = 0; $i