PHP | imageflip() Function

Last Updated : 23 Aug, 2019

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

<?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: image flip

Program 2:

php

<?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: flip image

Program 3:

php

<?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);
?>