Problems clipping & displaying an image

I am trying to extract a clip of a particular size from an image and display that clip on a web page using php. I have some code that will do that, however, I don’t know how to use it within the context of an actual page as the only method I have found for displaying the image includes the use of the header() function. Since I am inserting the images in the body of the page, other content is sent before the header() function called in the clip_image() function and the image in is not displayed.

My code is below. The commented out echo prior to calling the function prevents the display of the image if I uncomment it. Since I will be inserting a number of clipped images onto the page, there will, of necessity be content sent prior to calling the function that includes the header() function. If I do away with the header() function, I just get a bunch of BLOB data displayed.

I’m sure there is something obvious here, but I am not seeing it.




function clip_image($filename) {

// Get width & height of image
list($current_width, $current_height) = getimagesize($filename);

// Set final crop size
$crop_width = 150;  $crop_height = 150;

// Calculate origin of crop
$origin_left = ($current_width - $crop_width)/2;
$origin_top = ($current_height - $crop_height)/2;

// Create the crop template image and extract the image into a variable
$src = imagecreatefromjpeg($filename);
$dest = imagecreatetruecolor(150, 150);

// Clip the image starting at origin given
imagecopy($dest, $src, 0, 0, $origin_left, $origin_top, $current_width, $current_height);

// Output image
header('Content-Type: image/jpeg');
$dest = imagejpeg($dest, $stuff);

// What else can I do here to output the image???

// Clear memory


//echo 'This is some content sent before the header function';  // This line if uncommented prevents the display of the image

$filename = 'images/arrow.jpg';

$stuff = clip_image($filename);

echo "<img src = \\"$stuff\\" />";



You need to have the clip code on a separate page like clip.php and insert it in your page with the standard image tags e.g.

<img src="clip.php">

From memory you can add a variable to the image tag so you can use the same page for different images but it is a long time ago since I used this method!

It is funny as sometime I needed the header function due to the problem you are seeing and other time the header function caused the problem; I never knew why that was.

Thanks. I was thinking that this might be the case, i.e. it works if called from a different file. The header() function is odd. I often get confused by it.