(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)
imageistruecolor — Finds whether an image is a truecolor image
imageistruecolor() finds whether the image
image
is a truecolor image.
image
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
Version | Description |
---|---|
8.0.0 |
image expects a GdImage
instance now; previously, a valid gd resource was expected.
|
Example #1 Simple detection of true color image instances using imageistruecolor()
<?php// $im is an image instance// Check if image is a true color image or notif(!imageistruecolor($im)){ // Create a new true color image instance $tc = imagecreatetruecolor(imagesx($im), imagesy($im)); // Copy over the pixels imagecopy($tc, $im, 0, 0, 0, 0, imagesx($im), imagesy($im)); imagedestroy($im); $im = $tc; $tc = NULL; // OR use imagepalettetotruecolor()}// Continue working with image instance?>