[散分]生活便利小代码，拍照后，批量递归缩放目录图片.

    header('Content-type:text/html; charset=utf-8');    require "lib/imgHelper.php";    $imgHelper = new imgHelper( "dir1" );    $imgHelper->setOutputDir( "dir2" );    //默认输出在1024 768 下等比缩放，需要自定义时，$imgHelper->setOutputSize(1440,900);    $imgHelper->execution();

<?php/** * 图片处理助手 */class imgHelper{    public $srcFiles;     //源文件   array    public $srcDirs;      //源目录    public $exportDir;    //输出目录    public $exportFiles;  //输出文件  array    private  $_option = array("maxWidth"=>"1024" , "maxHeight"=>"768");    function __construct($dir = '' , $option = array() )    {        if (!$dir) return;        $this->srcDirs = $dir;        $this->srcFiles = $this->traversal($dir);        $this->setOptions( $option );    }    /**     * 设置输出目录     * @param $dir     */    public function setOutputDir( $dir )    {        if( !is_dir( $dir )) { mkdir($dir , 0777 , 1);}            $this->exportDir = $dir;    }    public function execution()    {       foreach( $this->srcFiles as $key =>$val ):           $srcImg = $val;           $toFile = str_replace( $this->srcDirs , $this->exportDir , $srcImg); //todo 简便处理.           $maxWidth = $this->_option["maxWidth"];           $maxHeight = $this->_option["maxHeight"];           $this->resize($srcImg , $toFile , $maxWidth , $maxHeight );       endforeach;    }    //缩放图片．    private  function resize($srcImage,$toFile,$maxWidth = 100,$maxHeight = 100,$imgQuality=100)    {            //创建目录目录!            $pInfo = pathinfo( $toFile );            $dir = $pInfo["dirname"];  if(!is_dir( $dir) ){ mkdir($dir , 0777 , 1);}            list($width, $height, $type, $attr) = getimagesize($srcImage);            if($width < $maxWidth  || $height < $maxHeight) return ;            switch ($type) {                case 1: $img = imagecreatefromgif($srcImage); break;                case 2: $img = imagecreatefromjpeg($srcImage); break;                case 3: $img = imagecreatefrompng($srcImage); break;            }            $scale = min($maxWidth/$width, $maxHeight/$height); //求出绽放比例            if($scale < 1) {                $newWidth = floor($scale*$width);                $newHeight = floor($scale*$height);                $newImg = imagecreatetruecolor($newWidth, $newHeight);                imagecopyresampled($newImg, $img, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);                $newName = "";                $toFile = preg_replace("/(.gif|.jpg|.jpeg|.png)/i","",$toFile);                switch($type) {                    case 1: if(imagegif($newImg, "$toFile$newName.gif", $imgQuality))                        return "$newName.gif"; break;                    case 2: if(imagejpeg($newImg, "$toFile$newName.jpg", $imgQuality))                        return "$newName.jpg"; break;                    case 3: if(imagepng($newImg, "$toFile$newName.png", $imgQuality))                        return "$newName.png"; break;                    default: if(imagejpeg($newImg, "$toFile$newName.jpg", $imgQuality))                        return "$newName.jpg"; break;                }                imagedestroy($newImg);            }            imagedestroy($img);            return false;    }    /**     * 设置输出的大小     * @param string $width     * @param string $height     */    public function setOutputSize( $width = "1024" , $height = "768"){        $_option = array("maxWidth"=>"$width" , "maxHeight"=>"$height");        $this->setOptions( $_option );    }    /**     * 设置可选参数     * @param $option     */    private  function setOptions( $option)    {        foreach( $option as $key =>$val):            if( isset( $option[$key]) && $option[$key] ){                $this->_option[$key] = $val;            }        endforeach;    }    /**     * 遍得到文件夹下的所有文件     */    private function traversal($path)    {        if (!$path) return array();        $files = array();        if (!is_dir($path)) return;        foreach (scandir($path) as $file)        {            if ($file != '.' && $file != '..') {                $path2 = $path . '/' . $file;                if (is_dir($path2)) {                    $temp = $this->traversal($path2);                    $files = array_merge($files, $temp);                } else {                    if ($this->isIMg($file)) {                        $files[] = $path . "/" . $file;                    }                }            }        }        return $files;    }    /**     * 判断是否是图片     * @param $file     * @return bool     */    private function isIMg($file)   {        $pInfo  = pathinfo( $file);         $extention =  $pInfo["extension"];        return  preg_match("/(jpg)|(png)|gif/i" , $extention);    }    /** * 调试数据 */    public  function debug() {$this->pr($this->srcFiles, "待处理图片数组.");          $this->pr( $this->srcDirs , "源目录");          $this->pr( $this->exportDir , "目标目录");    }    private function  pr($array, $title = 'DEBUG', $type = 'array', $width = '')  {      /*** @格式化输出 */        $title .= date("Y-m-d H:i:s");        $widthStr = "";        if ($width) $widthStr = "width:$width" . "px";        echo "<fieldset style=\"-moz-border-radius:5px 5px 5px 5px; -moz-box-shadow:0px 0px 10px rgba(00,00,00,0.45); border: 3px solid  transparent; padding:3px; margin-top:20px; \"><legend style=\"color: #069; margin:3px; $widthStr \">$title</legend>";        echo "<div style = '-moz-border-radius:10px 10px 10px 10px;font-size:14px; color:#069; border:1px solid #F0FAF9;  font-size:9pt; background:#F0FAF9; padding:5px;'>";        print("<pre class="brush:php;toolbar:false">");        if ($type == 'json') {  $array = json_decode($array);    }        print_r($array);        print("