PHP | imageistruecolor() function

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The imageistruecolor() function is an inbuilt function in PHP which is used to find whether an image is a true-color image or not. A true-color image is an image in which each pixel is specified by three values, ie, RGB.

Syntax:

bool imageistruecolor( resource $image )

Parameters:This function accepts a single parameter $image which holds the image.

Return Value: This function returns TRUE if image is truecolor or FALSE in other case.

Below given programs illustrate the imageistruecolor() function in PHP:

Program 1:

<?php 
// Create an image instance with a truecolor image 
$im = imagecreatefrompng( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-13.png'); 
  
// Check if image is truecolor 
$istruecolor = imageistruecolor($im); 
  
// Show the output to browser 
if($istruecolor) { 
    echo "The image is true color"; 
} 
?> 

Output:

The image is true color

Program 2:

<?php 
// Create an image instance with a grayscale image 
$im = imagecreatefrompng( 
'https://media.zambiatek.com/wp-content/uploads/20200124094548/grayscaleimage.png'); 
  
// Check if image is truecolor 
$istruecolor = imageistruecolor($im); 
  
// Show the output to browser 
if(!$istruecolor) { 
    echo "The image is not true color"; 
} 
?> 