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PHP | imageaffine() Function
  • Last Updated : 28 Jan, 2020

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:

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code

<?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);
?>

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Output:

Program 2:

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<?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);
?>

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Output:

Reference: https://www.php.net/manual/en/function.imageaffine.php

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