<?php

/* STEP 1: Check for an uploaded image */
/************************************************************************/

if($_FILES['form_upload_field_name']['size'] > 1) {


/* STEP 2: Create your filename and get the uploaded image */
/************************************************************************/
	$timestamp		= time();
	
	$resource		= $_FILES['form_upload_field_name']['tmp_name'];	// The uploaded filename //
	
	$image_destination	= '/path/to/images/folder/'.$timestamp.'.jpg';
	
	$thumb_destination	= '/path/to/thumbs/folder/'.$timestamp.'.jpg';	// this helps prevent duplication ie. johnsmith.jpg //
	
	
/* STEP 3: Check against valid image types */
/************************************************************************/

	/* Image type handler */
	switch(TRUE) {
		// HANDLES VARIOUS IMAGETYPES, NOT JUST JPEG, FOR USE WITH LOGOS ETC.

		case (stripos($resource,'.gif',0))	:$image = imagecreatefromgif($resource);
		break;

		case (stripos($resource,'.jpg',0) || stripos($resource,'.jpeg',0)) :$image = imagecreatefromjpeg($resource);
		break;

		case (stripos($resource,'.png',0)) :$image = imagecreatefrompng($resource);
		break;
	}
	

/* STEP 4: Get the original size and set your thumbnail size */
/************************************************************************/

	// Set a colour for the resouce (background default is black)
    $white			= imagecolorallocate($image, 255, 255, 255);
	// X & Y Coordinates
	$srcsize		= getimagesize($resource);
	$orig_width		= $srcsize[0];
	$orig_height	= $srcsize[1];
	
	$new_width = 100; // Your desired x
	$new_height = 100; // Your desired y
	

/* STEP 5A: CROP THE IMAGE */
/************************************************************************/

	$dest_img		= imagecreatetruecolor($new_width,$new_height);
	$white			= imagecopyresampled($dst_img, 255,255,255);
	
	ImageFilledRectangle($destImg,0,0,$new_width,$new_height,$white);
	
	$xm = $orig_width / $new_width;
	$ym = $orig_height / $new_height;
	$yHeight = $new_height / 2;
	$xWidth = $new_width / 2;

	if($orig_width > $orig_height) {  // A landscape image
		// REMOVE PIXELS WIDTH ASPECT
		$xAdjusted = $orig_width / $ym;
		$xHalf = $xAdjusted / 2;
		$xInt = $xHalf - $xWidth;
		ImageCopyResampled($destImg,$srcImg,-$xInt,0,0,0,$xAdjusted,$new_height,$x,$y);

	} elseif(($orig_width < $orig_height) || ($orig_width == $orig_height)) { // a portrait or square image
		// REMOVE PIXELS HEIGHT ASPECT
		$yAdjusted = $orig_height / $xm;
		$yHalf = $yAdjusted / 2;
		$yInt = $yHalf - $yHeight;
		$ySrc = $yInt / 2; // TRIAL SOME ARITHMETIC TO TRY AND IMPROVE Y CROPPING
		ImageCopyResampled($destImg,$srcImg,0,-$ySrc,0,0,$new_width,$yAdjusted,$x,$y);

	} else { // no scaling required //
		// STRAIGHTFORWARD RESIZE
		ImageCopyResampled($destImg,$srcImg,0,0,0,0,$new_width,$new_height,$x,$y);
	}


/* STEP 5B: ROTATE THE IMAGE (REMOVE THIS TO USE AS CROP ONLY) */
/************************************************************************/

	// Rotate the image (clockwise 0 - 359)
    $rotated_image	= imagerotate($image, 0, $white);
	$dest_img		= imagecreatetruecolor($new_width,$new_height);
	$white			= imagecopyresampled($dst_img, 255,255,255);
	
	ImageFilledRectangle($dst_img,0,0,$new_width,$new_height,$white); // Make the background white 0,0 is the top left corner for first pixel positioning

	$x_dest_offset = 0;
	$y_dest_offset = 0;
	$x_src_offset  = 0;
	$y_src_offset  = 0; // These position the original image within the new image //
	
	ImageCopyResampled($dst_img,$rotated_image,$x_dest_offset,$y_dest_offset,$x_src_offset,$y_src_offset,$new_width,$new_height,$orig_width,$orig_height);
	// See php.net for explanations of these functions fully, but hopefully the variable names make sense //


/* STEP 6: SAVE THE IMAGE AND THE UPLOADED IMAGE */
/************************************************************************/

	// Save the output from above
	$quality = 100; // 0 Worse -- 100 Best

    header("content-type: image/jpeg");

	ImageJpeg($dst_img,$destfileName,$quality);

    imagedestroy($image);

    imagedestroy($rotated_image);
	
	if(!(move_uploaded_file($_FILES['form_upload_field_name']['tmp_name'], $image_destination))) {
			// die("Cannot upload picture file. Story was not added to the database!"); // Use this to cancel all form submission //
			echo 'Image note saved successfully, please access your profile and try again.'; // Or tell the user to resubmit another image //
		}
}

// Continue processing form //

?>