php旋转图片90度的方法
复制代码 代码如下:
/**
* 修改一个图片 让其翻转指定度数
*
* @param string $filename 文件名(包括文件路径)
* @param float $degrees 旋转度数
* @return boolean
*/
function flip($filename,$src,$degrees = 90)
{
//读取图片
$data = @getimagesize($filename);
if($data==false)return false;
//读取旧图片
switch ($data[2]) {
case 1:
$src_f = imagecreatefromgif($filename);break;
case 2:
$src_f = imagecreatefromjpeg($filename);break;
case 3:
$src_f = imagecreatefrompng($filename);break;
}
if($src_f=="")return false;
$rotate = @imagerotate($src_f, $degrees,0);
if(!imagejpeg($rotate,$src,100))return false;
@imagedestroy($rotate);
return true;
}

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