使用频率比较高的PHP函数方法

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="#" onclick="history.go(-1)">返回</a>]“; $html .=”</td></tr> </table> </td></tr> </table>”; $html .=”</count>