php : 常用函數

常用函數：

<?php
/*** 獲取客戶端IP* @return [string] [description]*/
function getClientIp() {$ip = NULL;if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);$pos = array_search('unknown',$arr);if(false !== $pos) unset($arr[$pos]);$ip = trim($arr[0]);}elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {$ip = $_SERVER['HTTP_CLIENT_IP'];}elseif (isset($_SERVER['REMOTE_ADDR'])) {$ip = $_SERVER['REMOTE_ADDR'];}// IP地址合法驗證$ip = (false !== ip2long($ip)) ? $ip : '0.0.0.0';return $ip;
}/*** 獲取在線IP* @return String*/
function getOnlineIp($format=0) {global $S_GLOBAL;if(empty($S_GLOBAL['onlineip'])) {if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {$onlineip = getenv('HTTP_CLIENT_IP');} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {$onlineip = getenv('HTTP_X_FORWARDED_FOR');} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {$onlineip = getenv('REMOTE_ADDR');} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {$onlineip = $_SERVER['REMOTE_ADDR'];}preg_match("/[\d\.]{7,15}/", $onlineip, $onlineipmatches);$S_GLOBAL['onlineip'] = $onlineipmatches[0] ? $onlineipmatches[0] : 'unknown';}if($format) {$ips = explode('.', $S_GLOBAL['onlineip']);for($i=0;$i<3;$i++) {$ips[$i] = intval($ips[$i]);}return sprintf('%03d%03d%03d', $ips[0], $ips[1], $ips[2]);} else {return $S_GLOBAL['onlineip'];}
}/*** 獲取url* @return [type] [description]*/
function getUrl(){$pageURL = 'http';if (isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on") {$pageURL .= "s";}$pageURL .= "://";if ($_SERVER["SERVER_PORT"] != "80") {$pageURL .= $_SERVER["HTTP_HOST"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];} else {$pageURL .= $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];}return $pageURL;
}/*** 獲取當前站點的訪問路徑根目錄* @return [type] [description]*/
function getSiteUrl() {$uri = $_SERVER['REQUEST_URI']?$_SERVER['REQUEST_URI']:($_SERVER['PHP_SELF']?$_SERVER['PHP_SELF']:$_SERVER['SCRIPT_NAME']);return 'http://'.$_SERVER['HTTP_HOST'].substr($uri, 0, strrpos($uri, '/')+1);
}/*** 字符串截取，支持中文和其他編碼* @param [string] $str  [字符串]* @param integer $start [起始位置]* @param integer $length [截取長度]* @param string $charset [字符串編碼]* @param boolean $suffix [是否有省略號]* @return [type]   [description]*/
function msubstr($str, $start=0, $length=15, $charset="utf-8", $suffix=true) {if(function_exists("mb_substr")) {return mb_substr($str, $start, $length, $charset);} elseif(function_exists('iconv_substr')) {return iconv_substr($str,$start,$length,$charset);}$re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";$re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";$re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";$re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";preg_match_all($re[$charset], $str, $match);$slice = join("",array_slice($match[0], $start, $length));if($suffix) {return $slice."…";}return $slice;
}/*** php 實現js escape 函數* @param [type] $string [description]* @param string $encoding [description]* @return [type]   [description]*/
function escape($string, $encoding = 'UTF-8'){$return = null;for ($x = 0; $x < mb_strlen($string, $encoding);$x ++){$str = mb_substr($string, $x, 1, $encoding);if (strlen($str) > 1) { // 多字節字符$return .= "%u" . strtoupper(bin2hex(mb_convert_encoding($str, 'UCS-2', $encoding)));} else {$return .= "%" . strtoupper(bin2hex($str));}}return $return;
}
/*** php 實現 js unescape函數* @param [type] $str [description]* @return [type]  [description]*/
function unescape($str) {$str = rawurldecode($str);preg_match_all("/(?:%u.{4})|.{4};|&#\d+;|.+/U",$str,$r);$ar = $r[0];foreach($ar as $k=>$v) {if(substr($v,0,2) == "%u"){$ar[$k] = iconv("UCS-2","utf-8//IGNORE",pack("H4",substr($v,-4)));} elseif(substr($v,0,3) == "") {$ar[$k] = iconv("UCS-2","utf-8",pack("H4",substr($v,3,-1)));} elseif(substr($v,0,2) == "&#") {echo substr($v,2,-1)."";$ar[$k] = iconv("UCS-2","utf-8",pack("n",substr($v,2,-1)));}}return join("",$ar);
}/*** 數字轉人名幣* @param [type] $num [description]* @return [type]  [description]*/
function num2rmb ($num) {$c1 = "零壹貳叁肆伍陸柒捌玖";$c2 = "分角元拾佰仟萬拾佰仟億";$num = round($num, 2);$num = $num * 100;if (strlen($num) > 10) {return "oh,sorry,the number is too long!";}$i = 0;$c = "";while (1) {if ($i == 0) {$n = substr($num, strlen($num)-1, 1);} else {$n = $num % 10;}$p1 = substr($c1, 3 * $n, 3);$p2 = substr($c2, 3 * $i, 3);if ($n != '0' || ($n == '0' && ($p2 == '億' || $p2 == '萬' || $p2 == '元'))) {$c = $p1 . $p2 . $c;} else {$c = $p1 . $c;}$i = $i + 1;$num = $num / 10;$num = (int)$num;if ($num == 0) {break;}}$j = 0;$slen = strlen($c);while ($j < $slen) {$m = substr($c, $j, 6);if ($m == '零元' || $m == '零萬' || $m == '零億' || $m == '零零') {$left = substr($c, 0, $j);$right = substr($c, $j + 3);$c = $left . $right;$j = $j-3;$slen = $slen-3;}$j = $j + 3;}if (substr($c, strlen($c)-3, 3) == '零') {$c = substr($c, 0, strlen($c)-3);} // if there is a '0' on the end , chop it outreturn $c . "整";
}/*** 特殊的字符* @param [type] $str [description]* @return [type]  [description]*/
function makeSemiangle($str) {$arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4','５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9','Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E','Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J','Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O','Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T','Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y','Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd','ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i','ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n','ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's','ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x','ｙ' => 'y', 'ｚ' => 'z','（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[','】' => ']', '〖' => '[', '〗' => ']', '｛' => '{', '｝' => '}', '《' => '<','》' => '>','％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-','：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.','；' => ';', '？' => '?', '！' => '!', '…' => '-', '‖' => '|','”' => '"', '“' => '"', ''' => '`', '‘' => '`', '｜' => '|', '〃' => '"','　' => ' ','．' => '.');return strtr($str, $arr);
}/*** 下載* @param [type] $filename [description]* @param string $dir  [description]* @return [type]   [description]*/
function downloads($filename,$dir='./'){$filepath = $dir.$filename;if (!file_exists($filepath)){header("Content-type: text/html; charset=utf-8");echo "File not found!";exit;} else {$file = fopen($filepath,"r");Header("Content-type: application/octet-stream");Header("Accept-Ranges: bytes");Header("Accept-Length: ".filesize($filepath));Header("Content-Disposition: attachment; filename=".$filename);echo fread($file, filesize($filepath));fclose($file);}
}/*** 創建一個目錄樹* @param [type] $dir [description]* @param integer $mode [description]* @return [type]  [description]*/
function mkdirs($dir, $mode = 0777) {if (!is_dir($dir)) {mkdirs(dirname($dir), $mode);return mkdir($dir, $mode);}return true;
}

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