PHP常用工具类有哪些

小编给大家分享一下PHP常用工具类有哪些，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

具体代码如下所示：

 0)); $i ++) {if ($number = strpos ( str_pad ( decbin ( ord ( substr ( $string, $i, 1 ) ) ), 8, '0', STR_PAD_LEFT ), '0' )) {if ($length < 1.0) {break;}$result .= substr ( $string, $i, $number );$length -= 1.0;$i += $number - 1;} else {$result .= substr ( $string, $i, 1 );$length -= 0.5;}}$result = htmlspecialchars ( $result, ENT_QUOTES, 'UTF-8' );if ($i < $strlen) {$result .= $etc;}return $result;}/*** 遍历文件夹* @param string $dir* @param boolean $all true表示递归遍历* @return array*/public static function scanfDir($dir='', $all = false, &$ret = array()){if ( false !== ($handle = opendir ( $dir ))) {while ( false !== ($file = readdir ( $handle )) ) {if (!in_array($file, array('.', '..', '.git', '.gitignore', '.svn', '.htaccess', '.buildpath','.project'))) {$cur_path = $dir . '/' . $file;if (is_dir ( $cur_path )) {$ret['dirs'][] =$cur_path;$all && self::scanfDir( $cur_path, $all, $ret);} else {$ret ['files'] [] = $cur_path;}}}closedir ( $handle );}return $ret;}/*** 邮件发送* @param string $toemail* @param string $subject* @param string $message* @return boolean*/public static function sendMail($toemail = '', $subject = '', $message = '') {$mailer = Yii::createComponent ( 'application.extensions.mailer.EMailer' );//邮件配置$mailer->SetLanguage('zh_cn');$mailer->Host = Yii::app()->params['emailHost']; //发送邮件服务器$mailer->Port = Yii::app()->params['emailPort']; //邮件端口$mailer->Timeout = Yii::app()->params['emailTimeout'];//邮件发送超时时间$mailer->ContentType = 'text/html';//设置html格式$mailer->SMTPAuth = true;$mailer->Username = Yii::app()->params['emailUserName'];$mailer->Password = Yii::app()->params['emailPassword'];$mailer->IsSMTP ();$mailer->From = $mailer->Username; // 发件人邮箱$mailer->FromName = Yii::app()->params['emailFormName']; // 发件人姓名$mailer->AddReplyTo ( $mailer->Username );$mailer->CharSet = 'UTF-8';// 添加邮件日志$modelMail = new MailLog ();$modelMail->accept = $toemail;$modelMail->subject = $subject;$modelMail->message = $message;$modelMail->send_status = 'waiting';$modelMail->save ();// 发送邮件$mailer->AddAddress ( $toemail );$mailer->Subject = $subject;$mailer->Body = $message;if ($mailer->Send () === true) {$modelMail->times = $modelMail->times + 1;$modelMail->send_status = 'success';$modelMail->save ();return true;} else {$error = $mailer->ErrorInfo;$modelMail->times = $modelMail->times + 1;$modelMail->send_status = 'failed';$modelMail->error = $error;$modelMail->save ();return false;}}/*** 判断字符串是utf-8 还是gb2312* @param unknown $str* @param string $default* @return string*/public static function utf8_gb2312($str, $default = 'gb2312'){  $str = preg_replace("/[\x01-\x7F]+/", "", $str);  if (empty($str)) return $default;  $preg = array(    "gb2312" => "/^([\xA1-\xF7][\xA0-\xFE])+$/", //正则判断是否是gb2312    "utf-8" => "/^[\x{4E00}-\x{9FA5}]+$/u",   //正则判断是否是汉字(utf8编码的条件了)，这个范围实际上已经包含了繁体中文字了  );  if ($default == 'gb2312') {    $option = 'utf-8';  } else {    $option = 'gb2312';  }  if (!preg_match($preg[$default], $str)) {    return $option;  }  $str = @iconv($default, $option, $str);  //不能转成 $option, 说明原来的不是 $default  if (empty($str)) {    return $option;  }  return $default;}/*** utf-8和gb2312自动转化* @param unknown $string* @param string $outEncoding* @return unknown|string*/public static function safeEncoding($string,$outEncoding = 'UTF-8'){$encoding = "UTF-8";for($i = 0; $i < strlen ( $string ); $i ++) {if (ord ( $string {$i} ) < 128)continue;if ((ord ( $string {$i} ) & 224) == 224) {// 第一个字节判断通过$char = $string {++ $i};if ((ord ( $char ) & 128) == 128) {// 第二个字节判断通过$char = $string {++ $i};if ((ord ( $char ) & 128) == 128) {$encoding = "UTF-8";break;}}}if ((ord ( $string {$i} ) & 192) == 192) {// 第一个字节判断通过$char = $string {++ $i};if ((ord ( $char ) & 128) == 128) {// 第二个字节判断通过$encoding = "GB2312";break;}}}if (strtoupper ( $encoding ) == strtoupper ( $outEncoding ))return $string;elsereturn @iconv ( $encoding, $outEncoding, $string );}/*** 返回二维数组中某个键名的所有值* @param input $array* @param string $key* @return array*/public static function array_key_values($array =array(), $key=''){$ret = array();foreach((array)$array as $k=>$v){$ret[$k] = $v[$key];}return $ret;}/*** 判断 文件/目录 是否可写（取代系统自带的 is_writeable 函数）* @param string $file 文件/目录* @return boolean*/public static function is_writeable($file) {if (is_dir($file)){$dir = $file;if ($fp = @fopen("$dir/test.txt", 'w')) {@fclose($fp);@unlink("$dir/test.txt");$writeable = 1;} else {$writeable = 0;}} else {if ($fp = @fopen($file, 'a+')) {@fclose($fp);$writeable = 1;} else {$writeable = 0;}}return $writeable;}/*** 格式化单位*/static public function byteFormat( $size, $dec = 2 ) {$a = array ( "B" , "KB" , "MB" , "GB" , "TB" , "PB" );$pos = 0;while ( $size >= 1024 ) {$size /= 1024;$pos ++;}return round( $size, $dec ) . " " . $a[$pos];}/*** 下拉框，单选按钮 自动选择** @param $string 输入字符* @param $param 条件* @param $type  类型* selected checked* @return string*/static public function selected( $string, $param = 1, $type = 'select' ) {$true = false;if ( is_array( $param ) ) {$true = in_array( $string, $param );}elseif ( $string == $param ) {$true = true;}$return='';if ( $true )$return = $type == 'select' ? 'selected="selected"' : 'checked="checked"';echo $return;}/*** 下载远程图片* @param string $url 图片的绝对url* @param string $filepath 文件的完整路径（例如/www/images/test） ，此函数会自动根据图片url和http头信息确定图片的后缀名* @param string $filename 要保存的文件名(不含扩展名)* @return mixed 下载成功返回一个描述图片信息的数组，下载失败则返回false*/static public function downloadImage($url, $filepath, $filename) {//服务器返回的头信息$responseHeaders = array();//原始图片名$originalfilename = '';//图片的后缀名$ext = '';$ch = curl_init($url);//设置curl_exec返回的值包含Http头curl_setopt($ch, CURLOPT_HEADER, 1);//设置curl_exec返回的值包含Http内容curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//设置抓取跳转（http 301，302）后的页面curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);//设置最多的HTTP重定向的数量curl_setopt($ch, CURLOPT_MAXREDIRS, 3);//服务器返回的数据（包括http头信息和内容）$html = curl_exec($ch);//获取此次抓取的相关信息$httpinfo = curl_getinfo($ch);curl_close($ch);if ($html !== false) {//分离response的header和body，由于服务器可能使用了302跳转，所以此处需要将字符串分离为 2+跳转次数 个子串$httpArr = explode("\r\n\r\n", $html, 2 + $httpinfo['redirect_count']);//倒数第二段是服务器最后一次response的http头$header = $httpArr[count($httpArr) - 2];//倒数第一段是服务器最后一次response的内容$body = $httpArr[count($httpArr) - 1];$header.="\r\n";//获取最后一次response的header信息preg_match_all('/([a-z0-9-_]+):\s*([^\r\n]+)\r\n/i', $header, $matches);if (!empty($matches) && count($matches) == 3 && !empty($matches[1]) && !empty($matches[1])) {for ($i = 0; $i < count($matches[1]); $i++) {if (array_key_exists($i, $matches[2])) {$responseHeaders[$matches[1][$i]] = $matches[2][$i];}}}//获取图片后缀名if (0 < preg_match('{(?:[^\/\\\\]+)\.(jpg|jpeg|gif|png|bmp)$}i', $url, $matches)) {$originalfilename = $matches[0];$ext = $matches[1];} else {if (array_key_exists('Content-Type', $responseHeaders)) {if (0 < preg_match('{image/(\w+)}i', $responseHeaders['Content-Type'], $extmatches)) {$ext = $extmatches[1];}}}//保存文件if (!empty($ext)) {//如果目录不存在，则先要创建目录if(!is_dir($filepath)){mkdir($filepath, 0777, true);}$filepath .= '/'.$filename.".$ext";$local_file = fopen($filepath, 'w');if (false !== $local_file) {if (false !== fwrite($local_file, $body)) {fclose($local_file);$sizeinfo = getimagesize($filepath);return array('filepath' => realpath($filepath), 'width' => $sizeinfo[0], 'height' => $sizeinfo[1], 'orginalfilename' => $originalfilename, 'filename' => pathinfo($filepath, PATHINFO_BASENAME));}}}}return false;}/*** 查找ip是否在某个段位里面* @param string $ip 要查询的ip* @param $arrIP   禁止的ip* @return boolean*/public static function ipAccess($ip='0.0.0.0', $arrIP = array()){$access = true;$ip && $arr_cur_ip = explode('.', $ip);foreach((array)$arrIP as $key=> $value){if($value == '*.*.*.*'){$access = false; //禁止所有break;}$tmp_arr = explode('.', $value);if(($arr_cur_ip[0] == $tmp_arr[0]) && ($arr_cur_ip[1] == $tmp_arr[1])) {//前两段相同if(($arr_cur_ip[2] == $tmp_arr[2]) || ($tmp_arr[2] == '*')){//第三段为* 或者相同if(($arr_cur_ip[3] == $tmp_arr[3]) || ($tmp_arr[3] == '*')){//第四段为* 或者相同$access = false; //在禁止ip列，则禁止访问break;}}}}return $access;}/*** @param string $string 原文或者密文* @param string $operation 操作(ENCODE | DECODE), 默认为 DECODE* @param string $key 密钥* @param int $expiry 密文有效期, 加密时候有效， 单位 秒，0 为永久有效* @return string 处理后的 原文或者 经过 base64_encode 处理后的密文** @example** $a = authcode('abc', 'ENCODE', 'key');* $b = authcode($a, 'DECODE', 'key'); // $b(abc)** $a = authcode('abc', 'ENCODE', 'key', 3600);* $b = authcode('abc', 'DECODE', 'key'); // 在一个小时内，$b(abc)，否则 $b 为空*/public static function authcode($string, $operation = 'DECODE', $key = '', $expiry = 3600) {$ckey_length = 4;// 随机密钥长度 取值 0-32;// 加入随机密钥，可以令密文无任何规律，即便是原文和密钥完全相同，加密结果也会每次不同，增大破解难度。// 取值越大，密文变动规律越大，密文变化 = 16 的 $ckey_length 次方// 当此值为 0 时，则不产生随机密钥$key = md5 ( $key ? $key : 'key' ); //这里可以填写默认key值$keya = md5 ( substr ( $key, 0, 16 ) );$keyb = md5 ( substr ( $key, 16, 16 ) );$keyc = $ckey_length ? ($operation == 'DECODE' ? substr ( $string, 0, $ckey_length ) : substr ( md5 ( microtime () ), - $ckey_length )) : '';$cryptkey = $keya . md5 ( $keya . $keyc );$key_length = strlen ( $cryptkey );$string = $operation == 'DECODE' ? base64_decode ( substr ( $string, $ckey_length ) ) : sprintf ( '0d', $expiry ? $expiry + time () : 0 ) . substr ( md5 ( $string . $keyb ), 0, 16 ) . $string;$string_length = strlen ( $string );$result = '';$box = range ( 0, 255 );$rndkey = array ();for($i = 0; $i <= 255; $i ++) {$rndkey [$i] = ord ( $cryptkey [$i % $key_length] );}for($j = $i = 0; $i < 256; $i ++) {$j = ($j + $box [$i] + $rndkey [$i]) % 256;$tmp = $box [$i];$box [$i] = $box [$j];$box [$j] = $tmp;}for($a = $j = $i = 0; $i < $string_length; $i ++) {$a = ($a + 1) % 256;$j = ($j + $box [$a]) % 256;$tmp = $box [$a];$box [$a] = $box [$j];$box [$j] = $tmp;$result .= chr ( ord ( $string [$i] ) ^ ($box [($box [$a] + $box [$j]) % 256]) );}if ($operation == 'DECODE') {if ((substr ( $result, 0, 10 ) == 0 || substr ( $result, 0, 10 ) - time () > 0) && substr ( $result, 10, 16 ) == substr ( md5 ( substr ( $result, 26 ) . $keyb ), 0, 16 )) {return substr ( $result, 26 );} else {return '';}} else {return $keyc . str_replace ( '=', '', base64_encode ( $result ) );}}public static function gbkToUtf8($str){return iconv("GBK", "UTF-8", $str);}/*** 取得输入目录所包含的所有目录和文件* 以关联数组形式返回* author: flynetcn*/static public function deepScanDir($dir){$fileArr = array();$dirArr = array();$dir = rtrim($dir, '//');if(is_dir($dir)){$dirHandle = opendir($dir);while(false !== ($fileName = readdir($dirHandle))){$subFile = $dir . DIRECTORY_SEPARATOR . $fileName;if(is_file($subFile)){$fileArr[] = $subFile;} elseif (is_dir($subFile) && str_replace('.', '', $fileName)!=''){$dirArr[] = $subFile;$arr = self::deepScanDir($subFile);$dirArr = array_merge($dirArr, $arr['dir']);$fileArr = array_merge($fileArr, $arr['file']);}}closedir($dirHandle);}return array('dir'=>$dirArr, 'file'=>$fileArr);}/*** 取得输入目录所包含的所有文件* 以数组形式返回* author: flynetcn*/static public function get_dir_files($dir){if (is_file($dir)) {return array($dir);}$files = array();if (is_dir($dir) && ($dir_p = opendir($dir))) {$ds = DIRECTORY_SEPARATOR;while (($filename = readdir($dir_p)) !== false) {if ($filename=='.' || $filename=='..') { continue; }$filetype = filetype($dir.$ds.$filename);if ($filetype == 'dir') {$files = array_merge($files, self::get_dir_files($dir.$ds.$filename));} elseif ($filetype == 'file') {$files[] = $dir.$ds.$filename;}}closedir($dir_p);}return $files;}}

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