Use PHP to create thumbnails. (Cropped to square)

Question

I have a php script im currently using that creates thumbnails based on a max width and height. However, I\'d like it to always create square images and crop the images whe

Answer 1

You want to work out an offset rather than a new width/height so that the new sample stays in proportion, then use the offset when generating the new image and give it a fixed width/height so that it'll crop to a square. A quick example that would make a 100x100 thumb (note: untested),

// Get dimensions of the src image.
list($oldW, $oldH) = getimagesize($filename);

// Work out what offset to use
if ($oldH < $oldW) 
{
    $offH = 0;
    $offW = ($oldW-$oldH)/2;
    $oldW = $oldH;
} 
elseif ($oldH > $oldW) 
{
    $offW = 0;
    $offH = ($oldH-$oldW)/2;
    $oldH = $oldW;
} 
else 
{
    $offW = 0;
    $offH = 0;
}                

// Resample the image into the new dimensions.
$new = imagecreatetruecolor(100, 100);
imagecopyresampled($new, $src, 0, 0, $offW, $offH, 100, 100, $oldW, $oldH);