PHP資料夾遍歷，圖片等比例壓縮

等比例, PHP

  /**
 * 來源：網際網路
*/
 class image
 {
 var $w_pct = 100; //> var $w_quality = 100; //品質
 var $w_minwidth = 500; //最小寬
 var $w_minheight = 500; //最小高
 var $interlace = 0; //影像是否為隔行掃描的
 var $fontfile ; //字型檔
 var $w_img ; //預設浮水印圖

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

 function info($img)
 {
 $imageinfo = getimagesize($img); //傳回影像資訊陣列0=>寬的像素1 =>高的像素2=>是圖像類型的標記3 =>是文字字串，內容為“height="yyy" width="xxx"”，
 if($imageinfo === false) return false ;
 $imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //取得映像檔類型$imageinfo[2]是映像類型的標記
 $imagesize = filesize($img ); //圖片大小
 $info = array(
 'width'=>$imageinfo[0],
 'height'=>$imageinfo[1],
 'type'=> $imagetype,
 'size'=>$imagesize,
 'mime'=>$imageinfo['mime']
 );
 return $info;
 }

 /**
 * 追蹤
 *
 * @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); //取得圖片資訊
 if($info === false) return false;
 $srcwidth = $info['width']; //源圖寬
 $srcheight = $info['height']; //源圖高
 $pathinfo = pathinfo ($image);
 $type = $pathinfo['extension']; //取得副檔名
 if(!$type) $type = $info['type']; //若沒有取到，用$info['type']
 $type = strtolower($type);
 unset($info);
 $scale = min($maxwidth/$srcwidth, $maxheight/$srcheight) ; //取得縮略比例
 //取得依照來源圖的比列
 $createwidth = $width = (int) ($srcwidth*$scale);//取得縮寬();
 $createheight = $height = (int)($srcheight*$scale);//(); //取得縮略高
 $psrc_x = $psrc_y = 0;
 if($autocut) //依照縮圖的比例來取得
 {
 if($maxwidth/$maxheight=$height) //如果縮圖按比列比來源圖窄的話
 {
 $width = $maxheight/$height*$width; //寬依對應比例做處理
 $height = $maxheight;// //高不變
 }
 elseif( $maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)//如果縮圖按比列比源圖寬的話
 {
 $height = $maxwidth/$width*$height ;//
 $width = $maxwidth;
 }
 if($maxwidth == '55'){
 $width = '55';
 $createwidth = '55';
 }
 if($maxwidth == '110'){
 $width = '110';
 $createwidth = '110';
 }

 }
 }
 if($srcwidth $createwidth= $srcwidth;
 $createheight = $srcheight;
 }
 $createheight = $srcheight;
 }
 }
 $create imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的圖片處理函數
 $srcimg = $createfun($image); //回傳圖片識別碼 if($type != 'gif' && function_exists('imagecreatetruecolor')){  $thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一個真彩色圖像 }else{
 if($maxwidth == '110' && $srcheight >= $srcwidth){
 $height1 = 72;
 $thumbimg = imagecreate($width, $height1); //調色盤為基礎的圖片
 }elseif ($maxwidth == '110' && $srcheight  $width1 = 110;
 $thumbimg = imagecreate($width1, $height) ; //新建一個基於調色盤的圖片
 }else{
 $thumbimg = imagecreate($width, $height); //新建一個基於調色盤的圖片
 }
 }
 if(function_exists('imagecopyresampled')){ //重採樣拷貝部分影像並調整大小，真彩
 //imagecopyresampled(新圖，來源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
 if($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  $psrc_x = 0;
 $psrc_yz = $height/yz = $height/ 2;
 $psrc_y = $psrc_yz;
 $width = '110';
 }
 if($maxheight == '72' && $srcheight = '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{ //拷貝部分圖像並調整大小，調色板
 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $ width, $height, $srcwidth, $srcheight);
 }
 if($type=='gif' || $type=='png')
 {
 //imagecolorallocate 為一幅圖片分配顏色
 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 為基於調色盤的圖片填滿背景色， 指派一個綠色
 // imagecolortransparent 將某個顏色定義為透明色
 imagecolortransparent($thumbimg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
 }
 // imageinterlace 啟動或禁止隔行掃描
 if ($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; //取得檔案名稱
 //aaa.gif aaa_thumb.gif
 $imagefun($thumbimg, $filename); //新圖片
 imagedestroy($thumbimg); / /銷毀縮圖
 imagedestroy($srcimg); //銷毀來源圖
 return $filename;
 }
 /**
 * 限制寬或高
 *
 * @param string $image
 * @param int $maxwidth
 * @param int $maxheight
 * @param string $suffix> * @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); //取得圖片資訊
 if($info === false) return false;
 $srcwidth = $info['width']; //來源圖寬
 $srcheight = $info['height']; //來源圖高
 $pathinfo = pathinfo($image);
 $type = $pathinfo['extension']; //取得副檔名
 if(! $type) $type = $info['type']; //如果沒有取到，用$info['type']
 $type = strtolower($type);
 unset($info);
 if($maxwidth==0){
 $scale = $maxheight/$srcheight;
 if($scale $createwidth = $srcwidth*$scale;
 $createheight = $maxheight;
 }else{
 $createwidth = $srcwidth;
 $createheight = $srcheight;  }
 }
 if($maxheight==0){
 $scale = $maxwidth/$srcwidth;
 if($scale $createwidth = $maxwidth;
 $createheight = $srcheight*$scale;
 }else{
 $createwidth = $srcwidth;
 $createheight = $srcheight;
 }
 }
 $ps = 0;
 $createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的映像處理函數
 $srcimg = $createfun($image) ; //回傳圖片識別碼
 if($type != 'gif' && function_exists('imagecreatetruecolor')){
 $thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一個真彩色圖像
 }else{
 $thumbimg = imagecreate($createwidth, $createheight); //新建一個基於調色盤的圖片
 }
 if(function_exists('imagecopyresampled')){ //重採樣拷貝部分影像並調整大小，真彩
 //imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
 imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheightidth, $srcheight );

 }else{ //拷貝部分圖像並調整大小，調色板
 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $createheight, $srcwidth, $srcheight);
 }
 if($type=='gif' || $type=='png')
 {
 //imagecolorallocate 為一幅圖像分配顏色
 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 為基於調色盤的圖片填滿背景色， 指派一個綠色
 // imagecolortransparent 將某個顏色定義為透明色
 imagecolortransparent($thumbimg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
 }
 // imageinterlace 啟動或禁止隔行掃描
 if($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; //取得檔案名稱
 //aaa.gif aaa_thumb.gif
 $imagefun($thumbimg, $filename); //新圖片
 imagedestroy($thumbimg); //銷毀縮圖
 imagedestroy($thumbimg); //銷毀縮圖
 imagedestroy($srcimg); //銷毀來源圖
 return $filename;
 }
 /**
 * 產生特定尺寸縮圖解決原版縮圖無法滿足特定尺寸的問題PS：會裁掉圖片不符合縮圖比例的部分
 * @static
 * @access public
 * @ ？
 * @param boolean $interlace 啟用隔行掃描
 * @return void
*/
 static function thumb2($image, $thumbname, $type='', $maxWidth=200 , $maxHeight=50, $interlace=true) {
 // 取得原圖資訊
 $info = Image::getImageInfo($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 / $srcHeight); // 計算縮放比例
 //判斷原圖和縮圖比例如原圖寬於縮圖則裁掉兩邊反之..
 if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
 //高於
 $srcX = 0;
 $srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
 $cutWidth = $srcWidth;
;
 $cutHeight = $maxHeight / $scale;
 }else{
 //寬於
 $srcX = ($srcWidth - $maxWidth / $scale) / 2;
 $srcY = 0;
 $cutWidth = $maxWidth / $scale;
 $cutHeight = $srcHeight;
 }

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

 //建立錢包
 if ($type != 'gif' && function_exists('imagecreatetruecolor'))
 $thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
 $thumbImg = imagecreate($maxWidth, $maxHeight);

 // 複製圖片
 if (function_exists("ImageCopyResampled"))  imagecoresppmg,mhmg(pybmg,$pmg,$p,m, 0, $srcX, $srcY, $maxWidth, $maxHeight, $切割寬度，$切割高度）；
 else
 imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxsrcth , $maxHeight, $cutWidth, $cutHeight);
 if ('gif' == $type || 'png' == $type) {
 //imagealphablending($thumbImg, false);//取消預設的混色模式
 //imagesavealpha( $thumbImg,true);//設定保存完整的alpha 通道資訊
 $background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一個綠色
 imagecolortransparent($thumbImg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
 }

 // 對jpeg圖形設定隔行掃描
 if ('jpg' == $type || ' jpeg' == $type)
 imageinterlace($thumbImg, $interlace);

 // 產生圖片
 $imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
 @chmod(dirname($thumbname),0777);
 $imageFun($thumbImg, $thumbname);
 imageFun($thumbImg, $thumbname);
 imagedestroy( $thumbImg);
 imagedestroy($srcImg);
 回傳$thumbname;
 }
 回傳false;
 }


 /**
 /**
 /** /

 static function getImageInfo($img) {
 $imageInfo = getimagesize($img);
 if ($imageInfo !== false) {
 $imageType = strtolower(subsstr image_type_to_extension($imageInfo[2]), 1));
 $imageSize = 檔案大小($img);
 $info = array(
 "寬度" => $imageInfo[0],
 "高度" => $imageInfo[1],
 "型" => $imageType,
 "大小" => $imageSize,
 "mime" => $imageInfo['mime']
 );
 回傳$info;
 } else {
 回傳false;
 }
 }

 //watermark(來源圖,產生檔案,產生位置,水印檔,水印文字,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($source)) 回傳false;
 if(!$target) $target = $source;
 if ($w_img == '' && $w_text == '')
 $w_img = $this->w_img;
 $source_info = getimagesize($source);
 $source_w = $source_info[0]; //取得寬
 $source_h = $source_info[1]; //取得高
 if($source_w w_minwidth || $source_h w_minheight) return false; // 寬與達不到要求直接回傳
 switch($source_info[2]) // 新圖
 {
 case 1 :
 $source_img = imagecreatefromgif($ source);
 休息；
 案例2 :
 $source_img = imagecreatefromjpeg($source);
 休息；
 案例3 :
 $source_img = imagecreatefrompng($source);
 休息;
 預設：
 回傳false；
}
 if(!empty($w_img) && file_exists($w_img)) //水印檔案
 {
 $ifwaterimage = 1; // 是否浮水印圖
 $water_info = getimaimaize($w_imgesg) ; //浮水印資訊
 $width = $water_info[0];
 $height = $water_info[1];

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

 休息；
 案例2 :
 $water_img = imagecreatefromjpeg($ 3 :
 $water_img = imagecreatefrompng($w_img);

 休息；
 預設：
 回傳;
 }
 }
 else  $ifwaterimage = 0;
 //imagettfbbox本函數計算並傳回一個包圍TrueType文字範圍的虛擬方框的像素大小。
 //imagettfbbox ( 字體大小, 字體角度, 字體檔案,檔案)
 // echo $this->fontfile;
 $temp = imagettfbbox(ceil($w_font*1.6), 0, $this ->fontfile, $w_text);//取得使用truetype 字體的文字的範圍
 $width = $temp[4] - $temp[6]; //右上角X 位置- 左上角X 位置
 $height = $temp[3] - $temp[5]; //右下角Y 位置- 右上角Y 位置
 unset($temp);
 }
 switch($w_pos)
 {
 case 0: //隨機位置
 $wx = rand(0,($source_w - $width));
 $wy = rand(0,($source_h - $height));
 break;
 case 1: //左上角
 $wx = 25;
 $wy = 25;
 break;
 case 2: //上面中間位置
 $ wx = ($source_w - $width) / 2;
 $wy = 0;
 break;
 case 3: //右上角
 $wx = $source_w - $width;
 $wy = 0;
 break;
 case 4: //左邊中間位置
 $wx = 0;
 $wy = ($source_h - $height) / 2;
 break;
 case 5: //中間位置
 $wx = ($source_w - $width) / 2;
 $wy = ($source_h - $height) / 2;
 break;
 case 6: //底部中間位置
 $wx = ($source_w - $width) / 2;
 $wy = $source_h - $height;
 break;
 case 7: //左下角
 $wx = 0;
 $wy = $source_h - $height;
 break;
 case 8: //右邊中間位置
 $wx = $source_w - $width;
 $wy = ($source_h - $height) /2;
 break;
 case 9: //右下角
 $wx = $source_w - $width;
 $wy = $source_h - $height ;
 break;
 default: //隨機
 $wx = rand(0,($source_w - $width));
 $wy = rand(0,($source_h - $height));
 break;
 case 10://自訂位置
 $wx = $x;
 $wy = $y;
 case 11: //底部中間位置--手工客專用
 $wx = ($source_w - $width) / 2;
 $wy = $source_h - $height-50;
 break;
 break;
 }
 if($ifwaterimage) //如果有浮水印圖
 {

 //imagecopymerge 拷貝並合併影像的一部份
 //參數(源圖,水印圖,拷貝到源圖x位置,拷貝到來源圖y位置,從水印圖x位置,從水印圖y位置,高,寬,透明度)
 //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) ); //取得紅色
 $g = hexdec(substr($w_color,3,2)); //取得綠色
 $b = hexdec(substr($w_color,5)); //取得藍色
 }
 else
 {
 return;
 }
 //imagecolorallocate 基於調色盤的圖片填滿背景色
 //imagestring 水平畫一行字串
 //imagestring(來源圖,字體大小,位置X,位置Y,文字,顏色)
 //參數($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));
 }

 //輸出到檔案或瀏覽器
 switch($source_info[2])
 {
 case 1 :
 imagegif($source_img, $target); //以GIF 格式將影像輸出至瀏覽器或檔案
 break;
 case 2 :
 imagejpeg($source_img, $target, $this->w_quality); //以JPEG 格式將影像輸出到瀏覽器或檔案
 break;
 case 3 :
 imagepng($source_img, $target); //以PNG 格式將圖片輸出到瀏覽器或檔案
 break;
 default :
 return;
 }
 if(isset($water_info))
 {
 unset($water_info); //銷毀
 }
 if(isset($water_img))
 {
 imagedestroy($water_img); //銷毀
 }
 unset($source_info);
 imagedestroy($source_img);
 return true; //gd庫必須存在，後綴為jpg|jpeg|gif|png，文件存在，imagecreatefromjpeg或者imagecreatefromgif存在
        function check($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
 }
 }

 /**
 縮圖
 1.新建一個圖像資源通過imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
 2.imagecopyresampled 拷貝圖片，並調整大小

 水印：圖片
 2.加浮水印
 圖片浮水印：imagecopymerge 把2張圖合併在一起
 文字浮水印：imagettftext 寫入文字


*/
 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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