note 61081 added to function.imagecolorallocatealpha

If you only wish to extract the alpha value for a color, you can simply extract it like so: <?php $color = imagecolorat($im, 50, 50); $alpha = $color >> 24; ?> It actually shifts off the first 24 bits (where 8x3 are used for each color), and returns the remaining 7 allocated bits (commonly used for alpha) ---- Server IP: 83.137.20.120 Probable Submitter: 194.109.161.164 ---- Manual Page -- http://www.php.net/manual/en/function.imagecolorallocatealpha.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+61081 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+61081&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+61081&report=yes Search -- http://master.php.net/manage/user-notes.php