How does PHP deal with the problem that the picture uploaded by the IOS mobile camera is rotated 90 degrees counterclockwise?
This article mainly explains how PHP deals with the problem that pictures uploaded by IOS mobile cameras are rotated 90 degrees counterclockwise. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how PHP handles the problem that pictures uploaded by IOS mobile cameras are rotated 90 degrees counterclockwise.
When the photos uploaded by the IOS camera are taken, the vertical screen will be rotated 90 degrees counterclockwise because of the characteristics of the photos, so the back end can do some special processing here.
The function used is exif_read_data, which needs to enable the php_exif extension
Orientation is the positioning feature of the picture. The direction corresponding to the specific value is not detailed, but the solution is posted directly.
$image = imagecreatefromstring (file_get_contents ($_ 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
}
}
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