一键生成各种尺寸Icon的php脚本(实例)

实例如下：

<?php
/**
* @name thumb  缩略图函数
* @param  sting  $img_name  图片路径
* @param  int   $max_width 略图最大宽度
* @param  int   $max_height 略图最大高度
* @param  sting  $suffix 略图后缀(如"img_x.jpg"代表小图,"img_m.jpg"代表中图,"img_l.jpg"代表大图)
* @return  void
*/
function thumb($img_name,$max_width,$max_height,$path,$new_name)
{
 $img_infos = getimagesize($img_name);
 $img_height = $img_infos[0];//图片高
 $img_width = $img_infos[1]; //图片宽
 $img_extension = '';    //图片后缀名

switch($img_infos[2])
 {
   case 1:
     $img_extension = 'gif';
     break;
   case 2:
     $img_extension = 'jpeg';
     break;
   case 3:
     $img_extension = 'png';
     break;
   default:
     $img_extension = 'jpeg';
     break;
 }

$new_img_size = array();
 $new_img_size['width'] = $max_width;
 $new_img_size['height'] = $max_height;

$img_func = '';   //函数名称
 $img_handle = '';  //图片句柄
 $thum_handle = ''; //略图图片句柄

switch($img_extension)
 {
   case 'jpg':
     $img_handle = imagecreatefromjpeg($img_name);
     $img_func = 'imagejpeg';
     break;
   case 'jpeg':
     $img_handle = imagecreatefromjpeg($img_name);
     $img_func = 'imagejpeg';
     break;
   case 'png':
     $img_handle = imagecreatefrompng($img_name);
     imagesavealpha($img_handle, true);
     $img_func = 'imagepng';
     break;
   case 'gif':
     $img_handle = imagecreatefromgif($img_name);
     $img_func = 'imagegif';
     break;
   default:
     $img_handle = imagecreatefromjpeg($img_name);
     $img_func = 'imagejpeg';
     break;
 }

$quality = 100;//图片质量
 if($img_func == 'imagepng')
 {
   $quality = 9;
 }  

$thum_handle = imagecreatetruecolor($new_img_size['height'],$new_img_size['width']);
 imagealphablending($thum_handle,false);//这里很重要,意思是不合并颜色,直接用$img图像颜色替换,包括透明色;
 imagesavealpha($thum_handle,true);//这里很重要,意思是不要丢了$thumb图像的透明色;

if(function_exists('imagecopyresampled'))
 {
   imagecopyresampled($thum_handle,$img_handle, 0, 0, 0, 0,$new_img_size['height'],$new_img_size['width'],$img_height,$img_width);
 }  
 else  
 {
   imagecopyresized($thum_handle,$img_handle, 0, 0, 0, 0,$new_img_size['height'],$new_img_size['width'],$img_height,$img_width);
 }

call_user_func_array($img_func,array($thum_handle,$path.'/'.$new_name,$quality));
 imagedestroy($thum_handle);//清除句柄
 imagedestroy($img_handle);//清除句柄
}

$IconArray = array  
(
 "IOS8" => array  
 (
   array("width" => 180,  "height"=> 180, "path"=>"ios8",   "name"=>"Icon-180.png"),
   array("width" => 120,  "height"=> 120, "path"=>"ios8",   "name"=>"Icon-120.png"),
   array("width" => 152,  "height"=> 152, "path"=>"ios8",   "name"=>"Icon-152.png"),
   array("width" => 76,   "height"=> 76,    "path"=>"ios8",   "name"=>"Icon-76.png"),  
   array("width" => 144,  "height"=> 144, "path"=>"ios8",   "name"=>"Icon-144.png"),
   array("width" => 72,   "height"=> 72,    "path"=>"ios8",   "name"=>"Icon-72.png"),
   array("width" => 114,  "height"=> 114, "path"=>"ios8",   "name"=>"Icon-114.png"),
   array("width" => 57,   "height"=> 57,    "path"=>"ios8",   "name"=>"Icon-57.png"),  
   array("width" => 100,  "height"=> 100, "path"=>"ios8",   "name"=>"Icon-100.png"),
   array("width" => 50,   "height"=> 50,    "path"=>"ios8",   "name"=>"Icon-50.png"),  
   array("width" => 80,   "height"=> 80,    "path"=>"ios8",   "name"=>"Icon-80.png"),
   array("width" => 40,   "height"=> 40,    "path"=>"ios8",   "name"=>"Icon-40.png"),
   array("width" => 58,   "height"=> 58,    "path"=>"ios8",   "name"=>"Icon-58.png"),
   array("width" => 29,   "height"=> 29,    "path"=>"ios8",   "name"=>"Icon-29.png"),
 ),
 "IOS" => array  
 (
   array("width" => 180,  "height"=> 180, "path"=>"ios",    "name"=>"Icon-60@3x.png"),
   array("width" => 120,  "height"=> 120, "path"=>"ios",    "name"=>"Icon-60@2x.png"),
   array("width" => 152,  "height"=> 152, "path"=>"ios",    "name"=>"Icon-76@2x.png"),
   array("width" => 76,   "height"=> 76,    "path"=>"ios",    "name"=>"Icon-76.png"),  
   array("width" => 144,  "height"=> 144, "path"=>"ios",    "name"=>"Icon-72@2x.png"),
   array("width" => 72,   "height"=> 72,    "path"=>"ios",    "name"=>"Icon-72.png"),
   array("width" => 114,  "height"=> 114, "path"=>"ios",    "name"=>"Icon-57@2x.png"),
   array("width" => 57,   "height"=> 57,    "path"=>"ios",    "name"=>"Icon-57.png"),  
   array("width" => 100,  "height"=> 100, "path"=>"ios",    "name"=>"Icon-50@2x.png"),
   array("width" => 50,   "height"=> 50,    "path"=>"ios",    "name"=>"Icon-50.png"),  
   array("width" => 80,   "height"=> 80,    "path"=>"ios",    "name"=>"Icon-40@2x.png"),
   array("width" => 40,   "height"=> 40,    "path"=>"ios",    "name"=>"Icon-40.png"),
   array("width" => 58,   "height"=> 58,    "path"=>"ios",    "name"=>"Icon-29@2x.png"),
   array("width" => 29,   "height"=> 29,    "path"=>"ios",    "name"=>"Icon-29.png"),
 )
 ,
 "ANDROID" => array
 (
   array("width" => 144,  "height" => 144,   "path" => "android/drawable",      "name"=>"icon.png"),
   array("width" => 144,  "height" => 144,   "path" => "android/drawable-xhdpi", "name"=>"icon.png"),
   array("width" => 72,   "height" => 72, "path" => "android/drawable-hdpi",    "name"=>"icon.png"),
   array("width" => 48,   "height" => 48, "path" => "android/drawable-mdpi",    "name"=>"icon.png"),
   array("width" => 32,   "height" => 32, "path" => "android/drawable-ldpi",    "name"=>"icon.png")
 )
);

foreach ($IconArray["IOS8"] as $key => $IconType)  
{
 thumb("icon.png",$IconType['width'],$IconType['height'],$IconType['path'],$IconType['name']);
}

foreach ($IconArray["IOS"] as $key => $IconType)  
{
 thumb("icon.png",$IconType['width'],$IconType['height'],$IconType['path'],$IconType['name']);
}

foreach ($IconArray["ANDROID"] as $key => $IconType)  
{
 thumb("icon.png",$IconType['width'],$IconType['height'],$IconType['path'],$IconType['name']);
}

?>