(PHP 4, PHP 5)
imagecolorstotal — Find out the number of colors in an image's palette
Returns the number of colors in an image palette.
Returns the number of colors in the specified image's palette or 0 for truecolor images.
Example #1 Getting total number of colors in an image using imagecolorstotal()
<?php
// Create image instance
$im = imagecreatefromgif('php.gif');
echo 'Total colors in image: ' . imagecolorstotal($im);
// Free image
imagedestroy($im);
?>
위 예제의 출력 예시:
Total colors in image: 128