Change brightness in PHP
Description
The following code shows how to change brightness.
Example
// w w w . j a v a2 s. c o m
<?php
$im = imagecreatefrompng('test.png');
if($im && imagefilter($im, IMG_FILTER_BRIGHTNESS, 20))
{
echo 'Image brightness changed.';
imagepng($im, 'test.png');
imagedestroy($im);
}
else
{
echo 'Image brightness change failed.';
}
?>
The code above generates the following result.
