一些使用频率比较高的php函数
发布时间：2020-12-13 05:28:15 所属栏目：PHP教程 来源：网络整理
导读：1.产生随机字符串函数 function random($length) { $hash = @#@#; $chars = @#abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz@#; $max = strlen($chars) - 1; mt_srand((double)microtime() * 1000000); for($i = 0; $i $hash .= $chars[m
1.产生随机字符串函数function random($length) { $hash = @#@#; $chars = @#abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz@#; $max = strlen($chars) - 1; mt_srand((double)microtime() * 1000000); for($i = 0; $i < $length; $i++) { $hash .= $chars[mt_rand(0,$max)]; } return $hash; } 2.截取一定长度的字符串注：该函数对gb2312使用有效 function wordscut($string,$length,$sss=0) { if(strlen($string) > $length) { if($sss){ $length=$length - 3; $addstr=@# ...@#; } for($i = 0; $i < $length; $i++) { if(ord($string[$i]) > 127) { $wordscut .= $string[$i].$string[$i + 1]; $i++; } else { $wordscut .= $string[$i]; } } return $wordscut.$addstr; } return $string; } 3.取得客户端ip地址function getip(){ if (getenv("http_client_ip") && strcasecmp(getenv("http_client_ip"),"unknown")) $ip = getenv("http_client_ip"); else if (getenv("http_x_forwarded_for") && strcasecmp(getenv("http_x_forwarded_for"),"unknown")) $ip = getenv("http_x_forwarded_for"); else if (getenv("remote_addr") && strcasecmp(getenv("remote_addr"),"unknown")) $ip = getenv("remote_addr"); else if (isset($_server[@#remote_addr@#]) && $_server[@#remote_addr@#] && strcasecmp($_server[@#remote_addr@#],"unknown")) $ip = $_server[@#remote_addr@#]; else $ip = "unknown"; return($ip); } 4.创建相应的文件夹 function createdir($dir=@#@#) { if (!is_dir($dir)) { $temp = explode(@#/@#,$dir); $cur_dir = @#@#; for($i=0;$i $cur_dir .= $temp[$i].@#/@#; if (!is_dir($cur_dir)) { @mkdir($cur_dir,0777); } } } } 5.判断邮箱地址function checkemail($inaddress) { return (ereg("^([a-za-z0-9_-])+@([a-za-z0-9_-])+(.[a-za-z0-9_-])+",$inaddress)); } 6.跳转function gotourl($message=@#@#,$url=@#@#,$title=@#@#) { $html =""; if(!empty($url)) $html .="$html .=""; $html .=" "; $html .="
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