这是一些使用频率比较高的函数,有的来自别人的程序......
1.产生随机字符串函数
以下为引用的内容: 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 $hash; } |
2.截取一定长度的字符串
注:该函数对GB2312使用有效
以下为引用的内容: function wordscut($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; } |
以下为引用的内容: 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); } |
以下为引用的内容: function createdir($dir='') { if (!is_dir($dir)) { $temp = explode('/',$dir); $cur_dir = ''; for($i=0;$i<count($temp);$i++) { $cur_dir .= $temp[$i].'/'; if (!is_dir($cur_dir)) { @mkdir($cur_dir,0777); } } } } |
以下为引用的内容: function checkEmail($inAddress) { return (ereg("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+",$inAddress)); } |
6.跳转
以下为引用的内容: function gotourl($message='',$url='',$title='') { $html ="<html><head>"; if(!empty($url)) $html .="<meta http-equiv='refresh' content=\"3;url='".$url."'\">"; $html .="<link href='../templates/style.css' type=text/css rel=stylesheet>"; $html .="</head><body><br><br><br><br>"; $html .="<table cellspacing='0' cellpadding='0' border='1' width='450' align='center'>"; $html .="<tr><td bgcolor='#ffffff'>"; $html .="<table border='1' cellspacing='1' cellpadding='4' width='100%'>"; $html .="<tr class='m_title'>"; $html .="<td>".$title."</td></tr>"; $html .="<tr class='line_1'><td align='center' height='60'>"; $html .="<br>".$message."<br><br>"; if (!empty($url)) $html .="系统将在3秒后返回<br>如果您的浏览器不能自动返回,请点击[<a href=".$url." target=_self>这里</a>]进入"; else $html .="[<a href='#' onclick='history.go(-1)'>返回</a>]"; $html .="</td></tr></table></td></tr></table>"; $html .="</body></html>"; echo $html; exit; } |
以下为引用的内容: function getpage($sql,$page_size=20) { global $page,$totalpage,$sums; //out param $page = $_GET["page"]; //$eachpage = $page_size; $pagesql = strstr($sql," from "); $pagesql = "select count(*) as ids ".$pagesql; $result = mysql_query($pagesql); if($rs = mysql_fetch_array($result)) $sums = $rs[0]; $totalpage = ceil($sums/$page_size); if((!$page)||($page<1)) $page=1; $startpos = ($page-1)*$page_size; $sql .=" limit $startpos,$page_size "; return $sql; } function showbar($string="") |