(PECL imagick 2, PECL imagick 3)
Imagick::setImageOpacity — Sets the image opacity level
This function has been DEPRECATED as of Imagick 3.4.4. Relying on this function is highly discouraged.
Sets the image to the specified opacity level. This method is available if Imagick has been compiled against ImageMagick version 6.3.1 or newer. This method operates on all channels, which means that for example opacity value of 0.5 will set all transparent areas to partially opaque. To add transparency to areas that are not already transparent use Imagick::evaluateImage()
opacityThe level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.
Returns true on success.
Example #1 A Imagick::setImageOpacity() example
An example of using Imagick::setImageOpacity()
<?php
/* Create the object */
$image = new Imagick('source.png');
/* Set the opacity */
$image->setImageOpacity(0.7);
/* output the image */
header('Content-type: image/png');
echo $image;
?>This function is deprecated from last stable version (3.4.4 - 2019-05-02) of PECL Imagick extension.
More info: http://pecl.php.net/package-changelog.php?package=imagick&release=3.4.4
"setImageAlpha" is the new alternative function, but doesn't work with ImageMagick < 7.
More info: https://github.com/avalanche123/Imagine/issues/715