PHP | imagecolorresolve() Function - ❤️️ Online PHP tutorial

The imagecolorresolve() function is an inbuilt function in PHP which is used to get the index of the specified color or its closest possible alternative color. This function returns a color index value for a requested color, either the exact matched color or the closest possible alternative.

Syntax:

int imagecolorresolve ( $image, $red, $green, $blue )

Parameters: This function accepts four parameters as mentioned above and described below:

$image: It is returned by one of the image creation functions, such as imagecreatetruecolor(). It is used to create size of image.
$red: This parameter is used to set value of red color component.
$green: This parameter is used to set value of green color component.
$blue: This parameter is used to set value of blue color component.

Return Value: This function returns the color index.

Below programs illustrate the imagecolorresolve() function in PHP:

Program 1:

<?php 
   
// Load an image 
$image = imagecreatefromgif( 
'https://media.w3wiki.net/wp-content/uploads/animateImages.gif'); 
   
// Get closest colors from the image 
$colors = array(); 
$colors[] = imagecolorresolve($image, 167, 75, 55); 
$colors[] = imagecolorresolve($image, 150, 25, 250); 
$colors[] = imagecolorresolve($image, 161, 234, 135); 
$colors[] = imagecolorresolve($image, 143, 255, 254); 
   
// Output 
print_r($colors); 
   
imagedestroy($image); 
?> 

Output:

Array ( 
    [0] => 187 
    [1] => 188 
    [2] => 189 
    [3] => 190 
)

Program 2:

<?php 
   
// Load an image 
$image = imagecreatefrompng( 
'https://media.w3wiki.net/wp-content/uploads/col1.png'); 
   
// Get closest colors from the image 
$colors = array( 
    imagecolorresolve($image, 156, 0, 255), 
    imagecolorresolve($image, 0, 255, 200), 
    imagecolorresolve($image, 16, 134, 35), 
    imagecolorresolve($image, 143, 255, 254) 
); 
   
// Output 
print_r($colors); 
   
imagedestroy($image); 
?> 

Output:

Array ( 
    [0] => 10223871 
    [1] => 65480 
    [2] => 1082915 
    [3] => 9437182 
)

Related Articles:

Reference: http://php.net/manual/en/function.imagecolorresolve.php

PHP | imagecolorresolve() Function

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