- function resizeimage($srcfile,$mySize){
-
- $size=getimagesize($srcfile);
-
- switch($size[2]){
-
- case 1:
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- $img=imagecreatefromgif($srcfile);
-
- break;
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- case 2:
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- $img=imagecreatefromjpeg($srcfile);
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- break;
-
- case 3:
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- $img=imagecreatefrompng($srcfile);
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- break;
-
- }
- //源图片的宽度和高度
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- $oldImg['w']=imagesx($img);
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- $oldImg['h']=imagesy($img);
-
- if ($oldImg['w']
- $rate=1;
-
- }elseif ($oldImg['w']>$mySize['w'] && $oldImg['h']
- $rate=$mySize['w']/$oldImg['w'];
-
- }elseif ($oldImg['w']$mySize['h']){
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- $rate=$mySize['h']/$oldImg['h'];
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- }elseif ($oldImg['w']>$mySize['w'] && $oldImg['h']>$mySize['h']){
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- $rate1=$mySize['w']/$oldImg['w'];
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- $rate2=$mySize['h']/$oldImg['h'];
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- if ($rate1>$rate2){$rate=$rate2;}else{$rate=$rate1;}
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- }
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- $newImg['w']=$oldImg['w']*$rate;
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- $newImg['h']=$oldImg['h']*$rate;
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- return "width=".$newImg['w']." height=".$newImg['h'];
-
- }
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应用实例
- $mySize=array('w'=>143,'h'=>156);
- $imgSize=resizeimage("22.jpg",$mySize);
- echo "";
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