The imagecolordeallocate() function is an inbuilt function in PHP which is used to de-allocate a color created by imagecolorallocate() or imagecolorallocatealpha() function for an image.
Syntax:
bool imagecolordeallocate( $image, $color )
Parameters: This function accepts two 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 the size of image.
- $color: This parameter holds the color identifier.
Return Value: This function returns True on success or False on failure.
Below programs illustrate the imagecolordeallocate() function in PHP:
Program 1:
<?php   // It create the size of image or blank image. $image_size = imagecreatetruecolor(500, 300);   // Set the background color of image using // imagecolorallocate() function. $bg = imagecolorallocate($image_size, 0, 103, 0);   // Use imagecolordeallocate() function to // deallocate the color $bg = imagecolordeallocate($image_size, $bg);   // Fill background with above selected color. imagefill($image_size, 0, 0, $bg);   // Output image in the browser header("Content-type: image/png"); imagepng($image_size);   // free memory imagedestroy($image_size);   ?> |
Output:
Program 2:
<?php   // It create the size of image or blank image. $image_size = imagecreatetruecolor(500, 300);   // Set the background color of image. $bg = imagecolorallocate($image_size, 0, 103, 0);   // Use imagecolordeallocate() function to // deallocate the color $bg = imagecolordeallocate($image_size, $bg);   // Fill background with above selected color. imagefill($image_size, 0, 0, $bg);   // Set the colors of image $white_color = imagecolorallocate($image_size, 255, 255, 255);   // Draw a circle imagearc($image_size, 200, 150, 200, 200, 0, 360, $white_color);   // Output image in the browser header("Content-type: image/png"); imagepng($image_size);   ?> |
Output:
Reference: https://www.php.net/manual/en/function.imagecolordeallocate.php
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