(PHP 4 >= 4.3.0, PHP 5, PHP 7)
imagelayereffect — Set the alpha blending flag to use layering effects
imagelayereffect ( resource $image , int $effect ) : bool
Set the alpha blending flag to use layering effects.
image
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
effect
One of the following constants:
IMG_EFFECT_REPLACE
true
to imagealphablending()) IMG_EFFECT_ALPHABLEND
false
to imagealphablending()) IMG_EFFECT_NORMAL
IMG_EFFECT_ALPHABLEND
. IMG_EFFECT_OVERLAY
IMG_EFFECT_MULTIPLY
Returns true
on success or false
on failure.
Version | Description |
---|---|
7.2.0 | Added IMG_EFFECT_MULTIPLY (requires system libgd >= 2.1.1 or the bundled libgd). |
Example #1 imagelayereffect() example
<?php // Setup an image $im = imagecreatetruecolor(100, 100); // Set a background imagefilledrectangle($im, 0, 0, 100, 100, imagecolorallocate($im, 220, 220, 220)); // Apply the overlay alpha blending flag imagelayereffect($im, IMG_EFFECT_OVERLAY); // Draw two grey ellipses imagefilledellipse($im, 50, 50, 40, 40, imagecolorallocate($im, 100, 255, 100)); imagefilledellipse($im, 50, 50, 50, 80, imagecolorallocate($im, 100, 100, 255)); imagefilledellipse($im, 50, 50, 80, 50, imagecolorallocate($im, 255, 100, 100)); // Output header('Content-type: image/png'); imagepng($im); imagedestroy($im); ?>
The above example will output something similar to:
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https://www.php.net/manual/en/function.imagelayereffect.php