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