CascadiaPHP 2024

imageistruecolor

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

imageistruecolorFinds whether an image is a truecolor image

Description

imageistruecolor(GdImage $image): bool

imageistruecolor() finds whether the image image is a truecolor image.

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().

Return Values

Returns true if the image is truecolor, false otherwise.

Changelog

Version Description
8.0.0 image expects a GdImage instance now; previously, a valid gd resource was expected.

Examples

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 not
if(!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
?>

See Also

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