The imageaffine() function is an inbuilt function in PHP which is used to get an image containing the affine transformed src image using an optional clipping area. Affine is a geometric transformation operation involving MATRICES.
Syntax:
resource imageaffine( resource $image, array $affine, array $clip )
Parameters: This function accept three parameters as mentioned above and described below:
- $image: It specifies the image resource.
- $affine: It specifies the array with keys 0 to 5.
- $clip: It specifies the area to be clipped.
Return Value: This function returns affined image resource on success or FALSE on failure.
Exceptions: This function throws Exception on error.
Below given programs illustrate the imageaffine() function in PHP:
Program 1:
<?php   // Create a image from url $im = imagecreatefrompng(   // Affine the image $newimage = imageaffine($im, [ -1.3, 0, 0, -0.7, 0, 0 ]);   // Output the image header('Content-Type: image/png'); imagepng($newimage); ?> |
Output:
Program 2:
<?php   // Create a image from url $im = imagecreatefrompng(   $clipped = [     'x' => 0,     'y' => 0,     'width' => 200,     'height' => 200, ];   // Affine the image $newimage = imageaffine($im, [-1, 0, 0, sin(4), 0, 0], $clipped);   // Output the image header('Content-Type: image/png'); imagepng($newimage); ?> |
Output:
Reference: https://www.php.net/manual/en/function.imageaffine.php
