Crop tall .jpg to square WITHOUT complex cropping add-ons

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Crop tall .jpg to square WITHOUT complex cropping add-ons

amandaNHT

I have a handful of jpg files that are tall and vary in size. I want the excess length to be trimmed (so aligned top-center and cropped to a square) but I don't want to add any extra systems like thumb.php, ImageMagick, etc. to the page because simplicity and file-size are important for this quick project.

They are all 430 pixels wide and they should all be aligned to the top (rather than cropped to the center or something)

Any advice or help would be greatly appreciated.

NogDog

Here's a stripped down version of a function I wrote a few years ago that should work (if I didn't break it):

/**
* Resize image to specific dimension, cropping as needed
* @return resource Resized image resource, or boolean false on failure
* @param string $imgFile Path to image to be resized
* @param int $width
* @param int $height
* @param string $error Error message
*/
function myCrop($imgFile, $width=430, $height=430, &$error = null)
{
   $attrs = @getimagesize($imgFile);
   if($attrs == false or $attrs[2] != IMG_JPEG)
   {
      $error = "Uploaded image is not JPEG or is not readable by this page.";
      return false;
   }
   $resized = imagecreatetruecolor($width, $height);
   $result = imagecopyresampled($resized, $src, 0, 0, 0, 0, $width, $height, $width, $height);
   if($result == false)
   {
      $error = "Error trying to resize and crop image.";
      return false;
   }
   else
   {
      return $resized;
   }
}

Usage would be:

$resizedImage = myCrop(imagecreatefromjpeg('path/to/your/image.jpg'));
// now do whatever you want with the image, such as saving it as a file:
imagejpeg($resizedImage, 'path/to/resized/image.jpg', 90);

amandaNHT

I'm trying it but it isn't working.

NogDog

Looks like I screwed up a couple things when stripping out the features you didn't need. This test worked fine for me. (Note that it's outputting the image directly, versus writing it to a file. See my first reply for the imagejpeg() syntax to write it to a file if that's what you need.)

<?php
error_reporting(E_ALL);
ini_set('display_errors', true);

$imageFile = 'C:\Users\Public\Pictures\Sample Pictures\Penguins.jpg';
$newImage = myCrop($imageFile, 430, 430, $error);
if($newImage == false) {
	die($error);
}

// this is directly displaying the image, change it to write to file if desired:
header('Content-Type: image/jpeg');
imagejpeg($newImage);
exit;

/**
* Resize image to specific dimension, cropping as needed
* @return resource Resized image resource, or boolean false on failure
* @param string $imgFile Path to image to be resized
* @param int $width
* @param int $height
* @param string $error Error message
*/
function myCrop($imgFile, $width=430, $height=430, &$error = null)
{
   $attrs = @getimagesize($imgFile);
   if($attrs == false) // or $attrs[2] != IMG_JPEG)
   {
      $error = "Uploaded image is not JPEG or is not readable by this page.";
      return false;
   }
   $src = imagecreatefromjpeg($imgFile);
   if($src == false) {
		$error = "Unable to load source image.";
		return false;
   }
   $resized = imagecreatetruecolor($width, $height);
   $result = imagecopyresampled($resized, $src, 0, 0, 0, 0, $width, $height, $width, $height);
   if($result == false)
   {
      $error = "Error trying to resize and crop image.";
      return false;
   }
   else
   {
      return $resized;
   }
}