(PECL imagick 2, PECL imagick 3)
Imagick::transverseImage — Creates a horizontal mirror image
public Imagick::transverseImage ( ) : bool
Creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them 270-degrees. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
Returns true on success.
Example #1 Imagick::transverseImage()
<?php
function transverseImage($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->transverseImage();
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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https://www.php.net/manual/en/imagick.transverseimage.php