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GD and Image Functions
PHP Manual

# imageistruecolor

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

imageistruecolor — Finds whether an image is a truecolor image

### Description

bool imageistruecolor ( resource `$image` )

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

### Parameters

`image`

  An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

### Return Values

Returns `TRUE` if the `image` is truecolor, `FALSE` otherwise.

### 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
?>`

### Notes

> Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).

### See Also

- imagecreatetruecolor() - Create a new true color image
- imagepalettetotruecolor() - Converts a palette based image to true color

imageinterlace
imagejpeg
GD and Image Functions
PHP Manual