Image not rotating - php

Question

I am trying to rotate image using php imagerotate function but its not working.
GD Library is also on.
i have tried this ,
public function rotate()
{
$targ_w = 240;
$targ_h = 180;
$jpeg_quality = 100;
$degrees = 90;
$src = "/photos/sunset.jpg";
$image = imagecreatefromjpeg($src);
$rotatedImage = imagerotate($image,$degrees,0);
imagejpeg( $rotatedImage,$src,$jpeg_quality);
imagedestroy($rotatedImage);
die();
}

Answer 1

<?php
// File and rotation
$filename = 'test.jpg';
$degrees = 180;
// Content type
header('Content-type: image/jpeg');
// Load
$source = imagecreatefromjpeg($filename);
// Rotate
$rotate = imagerotate($source, $degrees, 0);
// Output
imagejpeg($rotate);
// Free the memory
imagedestroy($source);
imagedestroy($rotate);
?>

Answer 2

You're outputing the unchanged $image to file. You should output the rotated one.
imagejpeg( $rotatedImage,$name ,$jpeg_quality);
The second thing - your image is empty. It has only defined width and height but has no content inside it. You defined a $src variable but you don't use it at all.
Maybe you want to replace imagecreatetruecolor with this:
$src = "/photos/sunset.jpg";
$image = imagecreatefromjpeg($src);

Answer 3

You must output the rotated image (pass $rotatedImage instead of $image):
$rotatedImage = imagerotate($image,$degrees,0);
header('Content-type: image/jpeg'); //Header is required to output the image.
imagejpeg($rotatedImage,$name ,$jpeg_quality);
imagedestroy($rotatedImage);
die();

Answer 4

If you are trying to show the image then you need to change that:
header('Content-type: image/jpeg'); //Add jpeg header
imagejpeg( $rotatedImage, NULL, 100); //<-- Notice i remove the $src parameter
If you want to update your jpg file then your code will work, but the user that runs the php file need permissions to write the file. Of course your current image will be overwritten.
And as i said in comments you will need GD version 1.8 or later to work with jpeg files according to php.net