How to Rotate an Image Using PHP

Using the GD Library we can manipulate images in PHP. This script uses the imagerotate () function to rotate a photo. In our case we are rotating it 180 degrees but this can be changed in the script.

<?php
 // The file you are rotating
 $image = 'myfile.jpg' ;
 
 //How many degrees you wish to rotate
 $degrees = 180;
 
 // This sets the image type to .jpg but can be changed to png or gif
 header('Content-type: image/jpeg' ) ;
 
 // Create the canvas
 $source = imagecreatefromjpeg($image) ;
 
 // Rotates the image
 $rotate = imagerotate($source, $degrees, 0) ;
 
 // Outputs a jpg image, you could change this to gif or png if needed
 imagejpeg($rotate) ;
 ?>

Each line in the code is explained with comments. The most important part of this script, the rotating, is done with the imagerotate() function. The parameters of this function are: imagerotate (The_image, degrees_to_rotate, background_color, Optional_ignore_transparency). If the optional ignore transparency is blank or 0, then the transparency is preserved.