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PHP 中 Orientation 属性判断上传图片是否需要旋转,

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Release: 2016-06-13 08:53:05
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PHP 中 Orientation 属性判断上传图片是否需要旋转,

当使用苹果的iOS系统拍照上传图片的时候,可能会遇到图片被旋转的问题,这主要是取决于你拍照时拍照按钮的位置。假设拍照时你把手机旋转过来底部朝上,那拍出来的照片也是被旋转了的。

下面的代码将确保所有上传的照片在上传时都能是正确定向:

<&#63;php
$image = imagecreatefromstring(file_get_contents($_FILES['image_upload']['tmp_name']));
$exif = exif_read_data($_FILES['image_upload']['tmp_name']);
if(!empty($exif['Orientation'])) {
 switch($exif['Orientation']) {
  case 8:
   $image = imagerotate($image,90,0);
   break;
  case 3:
   $image = imagerotate($image,180,0);
   break;
  case 6:
   $image = imagerotate($image,-90,0);
   break;
 }
}
// $image now contains a resource with the image oriented correctly
&#63;>
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经测试,Android拍照的 Orientation 属性都是1,判断不出是否被旋转了。

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