PHP 简易读取文件目录下的文件，生成css spirte图片

 1 <?php
 2 header("Content-type: image/png");
 3 $path = "output";//建议这个文件目录下放入所有需要生成css spirte的图片
 4 
 5 //循环源文件目录
 6 $handle = opendir($path);
 7 $files = array();
 8 //读入源目录下的所有文件
 9 while(false !== ($file = readdir($handle))) {
10     if ($file != '.' && $file != '..') {
11         $filename = $path . "/"  . $file;
12         if(is_file($filename)) {
13             //$files[] = $filename;
14             $files[] = str_replace(".png","",$file);
15         }else {
16             //$files = array_merge($files, get_files($filename));
17             //$files = array_merge($files, str_replace(".png","",$file));
18         }
19     }
20 }   //  end while
21 closedir($handle);
22 
23 sort($files);
24 
25 //图片裁剪
26 // 缩略后的大小
27 /*$xx = 79;
28 $yy = 214;
29 foreach($files as $key=>$value){
30     //var_dump(getimagesize($value));
31     $src = $path.'/' . $value.'.png';
32     list($src_w,$src_h)=getimagesize($src);
33     $img = imagecreatefrompng($src);
34     imagesavealpha($img,true);
35     //很重要;
36     $newImg = imagecreatetruecolor($xx ,$yy);
37     imagealphablending($newImg,false);
38     //很重要,意思是不合并颜色,直接用$img图像颜色替换,包括透明色;
39     imagesavealpha($newImg,true);
40       //很重要,意思是不要丢了$newImg图像的透明色;
41     imagecopy($newImg,$img,0,0,0,0,$src_w,$src_h);
42     imagepng($newImg,$path.'/test/'.$value.'.png');
43     //imagedestroy($newImg);
44 
45 }
46 exit();*/
47 
48 foreach($files as $key=>&$value){
49     //var_dump(getimagesize($value));
50     $value = $path.'/' . $value.'.png';
51 }
52 unset($value);
53 $bgImageSize = 0; //透明背景的宽度
54 $bgImageHeight = 0; //透明底的高度
55 foreach($files as $key=>$value){
56     //var_dump(getimagesize($value));
57     $source[$key]['source'] = imagecreatefrompng($value);
58     $source[$key]['size']   = getimagesize($value);
59     $imageInfo                = $source[$key]['size'];
60     $bgImageSize             +=  $imageInfo[0];
61     if($imageInfo[1] > $bgImageHeight){
62         $bgImageHeight         = $imageInfo[1];
63     }
64 }
65 
66 
67 $img = imagecreatetruecolor($bgImageSize, $bgImageHeight);
68 imagesavealpha($img,true);
69 imagealphablending($img,false);//这里很重要,意思是不合并颜色,直接用$img图像颜色替换,包括透明色;
70 imagesavealpha($img,true);//这里很重要,意思是不要丢了$thumb图像的透明色;
71 
72 $source = array();
73 
74 foreach($files as $key=>$value){
75     //var_dump(getimagesize($value));
76     $source[$key]['source'] = imagecreatefrompng($value);
77     $source[$key]['size'] = getimagesize($value);
78 }
79 
80 $dst_y = 0; //图片之间的间距
81 
82 foreach($source as $key=>$value){
83     //bool imagecopy ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int $src_x , int $src_y , int $src_w , int $src_h )
84     $sourceInfo     =  $source[$key]['size'];
85     $dst_x             =  $key * $sourceInfo[0];
86     imagecopy($img, $source[$key]['source'], $dst_x, $dst_y, 0, 0, $sourceInfo[0], $sourceInfo[1]);
87 }
88 //定为文件名
89 $date = date("ymd_His").'_'.mt_rand(0,10);
90 imagepng($img,'image'.$date.'.png');
91 imagedestroy($img);