The imagecolorallocate() function is an inbuilt function in PHP which is used to set the color in an image. This function returns a color which is given in RGB format.
Syntax:
php
Output:
Program 2:
php
Output:
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Reference: https://www.php.net/manual/en/function.imagecolorallocate.php
int imagecolorallocate ( $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.
<?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);
// 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);
?>
<?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);
// 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);
// free memory
imagedestroy($image_size);
?>