PHP folder traversal, image compression at equal proportions

  /**
 * Source: Internet
*/
 class image
 {
 var $w_pct = 100; //Transparency
 var $w_quality = 100; //Quality
 var $w_minwidth = 500; / /Minimum width
 var $w_minheight = 500; //Minimum height
 var $interlace = 0; //Whether the image is interlaced
 var $fontfile; //Font file
 var $w_img; //Default watermark image

 function __construct()
 {
 $this->fontfile = $_SERVER['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf';
 $this->w_img = '';
 }
 function image( )
 {
 $this->__construct();
 }

 function info($img)
 {
 $imageinfo = getimagesize($img); //Return image information array 0=>Width pixels 1= >High pixel 2=> is the image type mark 3 => is a text string, the content is "height="yyy" width="xxx"",
 if($imageinfo === false) return false ;
 $imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //Get the image file type $imageinfo[2] is the mark of the image type
 $imagesize = filesize($img); // Image size
 $info = array(
 'width'=>$imageinfo[0],
 'height'=>$imageinfo[1],
 'type'=>$imagetype,
 'size'=> ;$imagesize,
 'mime'=>$imageinfo['mime']
 );
 return $info;
 }

 /**
         * 缩略图
         *
         * @param string $image
         * @param string $filename
         * @param int $maxwidth
         * @param int $maxheight
         * @param string $suffix
         * @param int $autocut
         * @return string
*/
 function thumb($image, $filename = '' ,$maxwidth = 50, $maxheight = 50, $suffix='_thumb', $autocut = 0)
 {
 if( !$this->check($image)) return false;
 $info = $this- >info($image); //Get image information
 if($info === false) return false;
 $srcwidth = $info['width']; //Source image width
 $srcheight = $info[ 'height']; //The source image is high
 $pathinfo = pathinfo($image);
 $type = $pathinfo['extension']; //Get the extension
 if(!$type) $type = $info[ 'type']; //If not obtained, use $info['type']
 $type = strtolower($type);
 unset($info);
 $scale = min($maxwidth/$srcwidth, $ maxheight/$srcheight); //Get the thumbnail ratio
 //Get the ratio according to the source image
 $createwidth = $width = (int) ($srcwidth*$scale); //Get the thumbnail width();
 $createheight = $height = (int)($srcheight*$scale);//(); //Get the thumbnail height
 $psrc_x = $psrc_y = 0;
 if($autocut) //According to the proportion of the thumbnail To get
 {
 if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height) //If the thumbnail is proportionally narrower than the source image
 {
 $width = $maxheight/$height *$width; //The width is processed according to the corresponding proportion
 $height = $maxheight;// //The height remains unchanged
 }
 elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width) //If the thumbnail is proportionally wider than the source image
 {
 $height = $maxwidth/$width*$height;//
 $width = $maxwidth;
 }
 if($maxwidth == '55') {
 $width = '55';
 $createwidth = '55';
 }
 if($maxwidth == '110'){
 $width = '110';
 $createwidth = '110';
 }

 }
 if($srcwidth<='280' && $maxwidth != '110'){
 $createwidth= $srcwidth;
 $createheight = $srcheight;
 }
 $createfun = 'imagecreatefrom'.($type= ='jpg' ? 'jpeg' : $type); //Find different image processing functions
 $srcimg = $createfun($image); //Return the image identifier
 if($type != 'gif' && function_exists ('imagecreatetruecolor')){
 $thumbimg = imagecreatetruecolor($createwidth, $createheight); //Create a new true color image
 }else{
 if($maxwidth == '110' && $srcheight >= $srcwidth){
 $height1 = 72;
 $thumbimg = imagecreate($width, $height1); //Create a new palette-based Image
 }elseif ($maxwidth == '110' && $srcheight <= $srcwidth){
 $width1 = 110;
 $thumbimg = imagecreate($width1, $height); //Create a new palette-based Image
 }else{
 $thumbimg = imagecreate($width, $height); //Create a new palette-based image
 }
 }
 if(function_exists('imagecopyresampled')){ //Resample and copy part of the image And adjust the size, true color
 //imagecopyresampled(new image, source image, x distance from the upper left corner of the new image, y distance from the upper left corner of the new image, x distance from the upper left corner of the source image, y distance from the upper left corner of the source image, width of the new image, new Image height, source image width, source image height)
 if($maxwidth == '110' && $srcheight >= $srcwidth){
 $psrc_x = 0;
 $psrc_yz = $height/2;
 $psrc_y = $psrc_yz;
 $width = '110';
 }
 if($maxwidth == '110' && $srcheight >= $srcwidth && $srcheight>= '72' && $srcwidth <= '110'){
 $psrc_x = 0;
 $psrc_yz = $height/2;
 $psrc_y = $psrc_yz;
 $width = '110';
 }
 if($maxheight == '72' && $srcheight <= $srcwidth && $srcheight<= '72' && $srcwidth >= '110'){
 $cha = ($maxheight-$srcheight)/2;
 $psrc_y = -($cha);
 $width = $srcwidth;
 $height = '72';
 $srcheight = '72';
 }
 imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);

 }else{ //Copy part of the image and resize, palette
 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
 }
 if($type=='gif' || $type=='png')
 {
 //imagecolorallocate assigns a color to an image
 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); / / Fill the background color of the image based on the palette, assign a green
 // imagecolortransparent Define a color as a transparent color
 imagecolortransparent($thumbimg, $background_color); // Set to a transparent color, if this line is commented out Output a green image
 }
 // imageinterlace activates or disables interlacing
 if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);
 $ imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
 //imagejpeg imagegif imagepng
 if(empty($filename)) $filename = substr($image, 0, strrpos( $image, '.')).$suffix.'.'.$type; //Get the file name
 //aaa.gif aaa_thumb.gif
 $imagefun($thumbimg, $filename); //New image
 imagedestroy ($thumbimg); //Destroy the thumbnail
 imagedestroy($srcimg); //Destroy the source image
 return $filename;
 }
 /**
 * Limit width or height
 *
 * @param string $image
 * @param int $maxwidth
 * @param int $maxheight
 * @param string $suffix
 * @return string
*/
 function thumb3($image,$maxwidth = 0, $maxheight = 0, $suffix='_thumb')
 {
 if( !$this->check($image)) return false;
 $info = $this->info($image); //Get Image information
 if($info === false) return false;
 $srcwidth = $info['width']; //Source image width
 $srcheight = $info['height']; //Source image height
 $pathinfo = pathinfo($image);
 $type = $pathinfo['extension']; //Get the extension
 if(!$type) $type = $info['type']; //If not obtained , use $info['type']
 $type = strtolower($type);
 unset($info);
 if($maxwidth==0){
 $scale = $maxheight/$srcheight;
 if($ scale<1){
 $createwidth = $srcwidth*$scale;
 $createheight = $maxheight;
 }else{
 $createwidth = $srcwidth;
 $createheight = $srcheight;
 }
 }
 if($maxheight==0){
 $scale = $maxwidth/$srcwidth;
 if($scale<1){
 $createwidth = $maxwidth;
 $createheight = $srcheight*$scale;
 } else{
 $createwidth = $srcwidth;
 $createheight = $srcheight;
 }
 }
 $psrc_x = $psrc_y = 0;
 $createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //Find different image processing functions
 $srcimg = $createfun($image); //Return the image identifier
 if($type != 'gif' && function_exists('imagecreatetruecolor')){
 $ thumbimg = imagecreatetruecolor($createwidth, $createheight); //Create a new true color image
 }else{
 $thumbimg = imagecreate($createwidth, $createheight); //Create a new palette-based image
 }
 if( function_exists('imagecopyresampled')){ //Resample copy part of the image and resize, true color
 //imagecopyresampled(new image, source image, x distance from the upper left corner of the new image, y distance from the upper left corner of the new image, upper left corner of the source image x distance, y distance from the upper left corner of the source image, new image width, new image height, source image width, source image height)
 imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight , $srcwidth, $srcheight);

 }else{ //Copy part of the image and resize, palette
 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight);
 }
 if($type=='gif' || $type=='png')
 {
 //imagecolorallocate assigns a color to an image
 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // Fill the background color of the palette-based image, assign a green
 // imagecolortransparent defines a color as transparent
 imagecolortransparent($thumbimg, $background_color); // Set to transparent Color, if this line is commented out, a green image will be output
 }
 // imageinterlace activates or disables interlacing
 if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this ->interlace);
 $imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
 //imagejpeg imagegif imagepng
 $filename = substr($image, 0, strrpos( $image, '.')).$suffix.'.'.$type; //Get the file name
 //aaa.gif aaa_thumb.gif
 $imagefun($thumbimg, $filename); //New image
 imagedestroy ($thumbimg); //Destroy the thumbnail
 imagedestroy($srcimg); //Destroy the source image
 return $filename;
 }
 /**
 * Generate thumbnails of specific sizes to solve the problem that the original thumbnails cannot meet the specific size. PS: The parts of the image that do not meet the thumbnail ratio will be cropped.
 * @static
 * @access public
 * @param string $image Original image
 * @param string $type image format
 * @param string $thumbname thumbnail file name
 * @param string $maxWidth width
 * @param string $maxHeight height
 * @param boolean $interlace enable interlacing
 * @return void
*/
 static function thumb2($image, $thumbname, $ type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
 // Get original image information
 $info = Image::getImageInfo($image);
 if ($info !== false ) {
 $srcWidth = $info['width'];
 $srcHeight = $info['height'];
 $type = empty($type) ? $info['type'] : $type;
 $type = strtolower($type);
 $interlace = $interlace ? 1 : 0;
 unset($info);
 $scale = max($maxWidth / $srcWidth, $maxHeight / $srcHeight); // Calculate the scaling ratio
 //Judge the ratio between the original image and the thumbnail. For example, if the original image is wider than the thumbnail, crop both sides and vice versa..
 if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
 //Higher than
 $srcX = 0 ;
 $srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
 $cutWidth = $srcWidth;
 $cutHeight = $maxHeight / $scale;
 }else{
 //Wider than
 $srcX = ($ srcWidth - $maxWidth / $scale) / 2;
 $srcY = 0;
 $cutWidth = $maxWidth / $scale;
 $cutHeight = $srcHeight;
 }

                // 载入原图
                $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
                $srcImg = $createFun($image);

                //创建缩略图
                if ($type != 'gif' && function_exists('imagecreatetruecolor'))
                    $thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
                else
                    $thumbImg = imagecreate($maxWidth, $maxHeight);

                // 复制图片
                if (function_exists("ImageCopyResampled"))
                    imagecopyresampled($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
                else
                    imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
                if ('gif' == $type || 'png' == $type) {
                    //imagealphablending($thumbImg, false);//取消默认的混色模式
                    //imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
                    $background_color = imagecolorallocate($thumbImg, 0, 255, 0);  //  指派一个绿色
                    imagecolortransparent($thumbImg, $background_color);  //  设置为透明色，若注释掉该行则输出绿色的图
                }

                // 对jpeg图形设置隔行扫描
                if ('jpg' == $type || 'jpeg' == $type)
                    imageinterlace($thumbImg, $interlace);

                // 生成图片
                $imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
                @chmod(dirname($thumbname),0777);
                $imageFun($thumbImg, $thumbname);
                imagedestroy($thumbImg);
                imagedestroy($srcImg);
                return $thumbname;
            }
            return false;
        }


        /**
 * Get image information
 * @static
 * @access public
 * @param string $image image file name
 * @return mixed
*/

        static function getImageInfo($img) {
            $imageInfo = getimagesize($img);
            if ($imageInfo !== false) {
                $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1));
                $imageSize = filesize($img);
                $info = array(
                        "width" => $imageInfo[0],
                        "height" => $imageInfo[1],
                        "type" => $imageType,
                        "size" => $imageSize,
                        "mime" => $imageInfo['mime']
                );
                return $info;
            } else {
                return false;
            }
        }

        //watermark(源图,生成文件,生成位置,水印文件,水印文本,背景色)
        function watermark($source, $target = '', $w_pos = 9, $w_img = '', $w_text = '', $w_font = 12, $w_color = '#cccccc',$x='',$y='')
        {
            if( !$this->check($source)) return false;
            if(!$target) $target = $source;
            if ($w_img == '' && $w_text == '')
            $w_img = $this->w_img;
            $source_info = getimagesize($source);
            $source_w    = $source_info[0]; //获取宽
            $source_h    = $source_info[1]; //获取高
            if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false; //宽和高达不到要求直接返回
            switch($source_info[2]) //新建图片
            {
                case 1 :
                    $source_img = imagecreatefromgif($source);
                    break;
                case 2 :
                    $source_img = imagecreatefromjpeg($source);
                    break;
                case 3 :
                    $source_img = imagecreatefrompng($source);
                    break;
                default :
                    return false;
            }
            if(!empty($w_img) && file_exists($w_img)) //水印文件
            {
                $ifwaterimage = 1; //是否水印图
                $water_info   = getimagesize($w_img); //水印信息
                $width        = $water_info[0];
                $height       = $water_info[1];

                switch($water_info[2])
                {
                    case 1 :
                        $water_img = imagecreatefromgif($w_img);

                        break;
                    case 2 :
                        $water_img = imagecreatefromjpeg($w_img);
                        break;
                    case 3 :
                        $water_img = imagecreatefrompng($w_img);

                        break;
                    default :
                        return;
                }
            }
            else
            {
                $ifwaterimage = 0;
                //imagettfbbox 本函数计算并返回一个包围着 TrueType 文本范围的虚拟方框的像素大小。
 //imagettfbbox (font size, font angle, font file, file)
 // echo $this->fontfile;
 $temp = imagettfbbox(ceil($w_font*1.6), 0, $this->fontfile, $w_text);//Get the range of text using truetype font
 $width = $temp[4] - $temp[6]; //The X position of the upper right corner - the X position of the upper left corner
 $height = $temp[3] - $temp[5]; //Lower right corner Y position - Upper right corner Y position
 unset($temp);
 }
 switch($w_pos)
 {
 case 0: //Random position
 $wx = rand(0 ,($source_w - $width));
 $wy = rand(0,($source_h - $height));
 break;
 case 1: //Upper left corner
 $wx = 25;
 $wy = 25;
 break;
 case 2: //The upper middle position
 $wx = ($source_w - $width) / 2;
 $wy = 0;
 break;
 case 3: //The upper right corner
 $wx = $source_w - $width;
 $wy = 0;
 break;
 case 4: //Middle position on the left
 $wx = 0;
 $wy = ($source_h - $height) / 2;
 break;
 case 5: // Middle position
 $wx = ($source_w - $width) / 2;
 $wy = ($source_h - $height) / 2;
 break;
 case 6: // Bottom middle position
 $wx = ($source_w - $width) / 2;
 $wy = $source_h - $height;
 break;
 case 7: //Lower left corner
 $wx = 0;
 $wy = $source_h - $height;
 break;
 case 8: //Middle position on the right
 $wx = $source_w - $width;
 $wy = ($source_h - $height) /2;
 break;
 case 9: //Lower right corner
 $wx = $source_w - $width;
 $wy = $source_h - $height ;
 break;
 default: //random
 $wx = rand(0,($source_w - $width));
 $wy = rand(0,($source_h - $height ));
 break;
 case 10://Customized position
 $wx = $x;
 $wy = $y;
 case 11: //Bottom middle position--for craftsmen only
 $wx = ($source_w - $width) / 2;
 $wy = $source_h - $height-50;
 break;
 break;
 }
 if($ifwaterimage) //If there is a watermark image
 {

 //imagecopymerge copy and merge images Part of
 //Parameters (source image, watermark image, copy to source image x position, copy to source image y position, from watermark image x position, from watermark image y position, height, width, transparency)
 //imagecopymerge( $source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);

 imagecopy($source_img,$water_img,$wx,$wy,0,0, $width,$height);
 }
 else
 {
 if(!empty($w_color) && (strlen($w_color)==7))
 {
 $r = hexdec(substr($w_color,1,2 )); //Get red
 $g = hexdec(substr($w_color,3,2)); //Get green
 $b = hexdec(substr($w_color,5)); //Get blue
 }
 else
 {
 return;
 }
 //imagecolorallocate fills the background color with an image based on the palette
 //imagestring draws a line of string horizontally
 //imagestring(source image, font size, position X, position Y, text , color)
 //Parameters ($image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text)
 imagettftext($source_img,$w_font,0, $wx,$wy,imagecolorallocate($source_img,$r,$g,$b),$this->fontfile,$w_text);
 //imagestring($source_img,$w_font,$wx,$wy,$ w_text,imagecolorallocate($source_img,$r,$g,$b));
 }

 //Output to a file or browser
 switch($source_info[2])
 {
 case 1 :
 imagegif($source_img, $target); //Output the image to a browser or file in GIF format
 break ;
 case 2 :
 imagejpeg($source_img, $target, $this->w_quality); //Output the image to the browser or file in JPEG format
 break;
 case 3 :
 imagepng($source_img, $target ; if(isset($water_img))
 {
 imagedestroy($water_img); //Destroy
 }
 unset($source_info);
 imagedestroy($source_img);
 return true;
 }
 //gd library must exist, The suffix is ​​jpg|jpeg|gif|png, the file exists, imagecreatefromjpeg or imagecreatefromgif exists
 function check($image)
 {
 return extension_loaded('gd') &&
 preg_match("/.(JPG|JPEG|PNG|GIF| jpg|jpeg|gif|png)/i", $image, $m) &&
 file_exists($image) &&
 function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $ m[1]));
 //imagecreatefromjpeg
 //imagecreatefromgif
 //imagecreatefrompng
 }
 }

 /**
 Thumbnail
 1. Create a new image resource through imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
 2.imagecopyresampled Copy the image and resize it

 Watermark: image watermark, text watermark
 1. Create image
 2. Add watermark
 Image watermark: imagecopymerge Put 2 Merge images together
 Text watermark: imagettftext Write text to images


*/
 error_reporting(0);
 $hostdir = dirname(__FILE__);
 $ filesnames = scandir($hostdir.'/desktop');
 $img = new image();
 foreach($filesnames as $name){
 if($name != '.' && $name != '.. '){
 $imgPath = $hostdir.'/desktop/';
 $imgsize = getimagesize($imgPath.$name);
 $imgInfo = explode('.',$name);
 $imginfo2 = explode(' _',$imgInfo[0]);
 if($imginfo2[count($imginfo2)-1] != 'small'){
 $img_small = $imgPath.$imgInfo[0].'_small.'.$ imgInfo[1];
 $img->thumb2($imgPath.$name,$img_small,'',$imgsize[0]/4,$imgsize[1]/4);
 }
 }
 }


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