PHP | imageflip() Function

The imageflip() function is an inbuilt function in PHP which is used to Flip an image horizontally, vertically or both horizontally and vertically using the given mode.

Syntax:

bool imageflip( $image, $mode )

Parameters: This function accepts two parameters as mentioned above and described below:

• $image: The imagecreatetruecolor() function is used to create a blank image in a given size.
• $mode: This parameter is used to hold the Flip mode of image. This can be one of the IMG_FLIP_* constants:
  • IMG_FLIP_HORIZONTAL – Flips the image horizontally.
  • IMG_FLIP_VERTICAL – Flips the image vertically.
  • IMG_FLIP_BOTH – Flips the image both horizontally and vertically.

Return Value: This function returns TRUE on success or FALSE on failure.

Below programs illustrate the imageflip() function in PHP.

Note: The image given below is used in the following program.

Program 1:

<?php

// Assign image file in variable.
$image_name = 'geeks.png';

// Load image file
$image = imagecreatefrompng($image_name);

// Flip the image vertically
imageflip($image, IMG_FLIP_VERTICAL);

// Content type
header('Content-type: image/png');

// Output
imagejpeg($image);
?>

Output:

Program 2:

<?php

// Assign image file to variable
$image_name = 'geeks.png';

// Load image file
$image = imagecreatefrompng($image_name);

// Flip the image horizontally
imageflip($image, IMG_FLIP_HORIZONTAL);

// Content type
header('Content-type: image/png');

// Output
imagejpeg($image);
?>

Output:

Program 3:

<?php

// Assign image file to variable
$image_name = 'geeks.png';

// Load image file
$image = imagecreatefrompng($image_name);

// Flip the image file both horizontally
// and vertically.
imageflip($image, IMG_FLIP_BOTH);

// Content type
header('Content-type: image/png');

// Output
imagejpeg($image);
?>

Output:

Reference: http://php.net/manual/en/function.imageflip.php