Cropping a square from an image.

[justcrapx]

How can i crop an image using gd? I want to cut off exceeding width or height and to make the image square. A simple example for only jpg would make it.

[justcrapx]

no relpies? =(

[cheezylu]

I would like to know how to do this too...

[cheezylu]

Woo... I believe I have it figured out!

Here is a modified code from lixlpixel of PHP Paradise.  This will create a cropped thumbnail of a JPEG and upload them both into a specified directory.

[code]<?php

if(isset($_POST['Submit']))

{
$size = 100; // the thumbnail height

$filedir = 'pics/'; // the directory for the original image
$thumbdir = 'pics/'; // the directory for the thumbnail image
$prefix = 'THUM_'; // the prefix to be added to the original name

$maxfile = '2000000';
$mode = '0666';

$userfile_name = $_FILES['image']['name'];
$userfile_tmp = $_FILES['image']['tmp_name'];
$userfile_size = $_FILES['image']['size'];
$userfile_type = $_FILES['image']['type'];

if (isset($_FILES['image']['name']))
{
$prod_img = $filedir.$userfile_name;

$prod_img_thumb = $thumbdir.$prefix.$userfile_name;
move_uploaded_file($userfile_tmp, $prod_img);
chmod ($prod_img, octdec($mode));

$sizes = getimagesize($prod_img);

$aspect_ratio_wide = $sizes[1]/$sizes[0];
$aspect_ratio_tall = $sizes[0]/$sizes[1];

if ($sizes[1] > $sizes[0]) // if height is greater than width
{

if ($sizes[0] <= $size) // if width <= defined size
{
$new_width = $sizes[0];
$new_height = $sizes[1];
}else{
$new_width = $size;
$new_height = abs($new_width/$aspect_ratio_tall); }

$size_difference_height = $sizes[1] / $new_height;
$center_width = 0;
$center_height = (($new_height - $size) / 2) * $size_difference_height;

} else if ($sizes[0] > $sizes[1]) { // else if width is greater than height

if ($sizes[1] <= $size)
{
$new_width = $sizes[0];
$new_height = $sizes[1];
}else{
$new_height = $size;
$new_width = abs($new_height/$aspect_ratio_wide);
}

$size_difference_width = $sizes[0] / $new_width;
$center_width = (($new_width - $size) / 2) * $size_difference_width;
$center_height = 0;

}


$destimg = imagecreatetruecolor($size,$size)
or die('Problem In Creating image');
$srcimg = imagecreatefromjpeg($prod_img)
or die('Problem In opening Source Image');

imagecopyresampled($destimg,$srcimg,0,0,$center_width,$center_height,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg))
or die('Problem In resizing');

ImageJPEG($destimg,$prod_img_thumb,90)
or die('Problem In saving');
imagedestroy($destimg);
}

echo '
<a href="'.$prod_img.'">
<img src="'.$prod_img_thumb.'" width="$size" height="$size">
</a>
';


}else{

echo '
<form method="POST" action="'.$_SERVER['PHP_SELF'].'" enctype="multipart/form-data">
<input type="file" name="image"><p>
<input type="Submit" name="Submit" value="Submit">
</form>';
}

?>[/code]