使用频率比较高的PHP函数方法

youngfan007

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  $length) {if($sss){$length=$length – 3;$addstr=’ …’;}for($i = 0; $i  127) {$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<count .="$temp[$i].’/';" if function checkemail return gotourl>”;if(!empty($url))$html .=”<meta http-equiv="’refresh’" content="/”3;url=’”.$url.”‘/”">”;$html .=”<link href="%E2%80%99../templates/style.css%E2%80%99" type="text/css" rel="stylesheet">”;$html .=”<br><br><br><br>”;$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=".%24url." target="_self">这里</a>]进入”;else$html .=”[<a href="#" >返回</a>]“;$html .=”</td></tr></table></td></tr></table>”;$html .=”</count>