Image upload and resizing class

[AdRock]

I have had a go at creating a class becuase i want to learn how to do it and I have taken some old procedral code and put it into a class.

 

I know it's not going to work yet but hopefully haven't got far to fgo before it does.

 

I have worked with classes before (not written by me) and i understand how they work so that's why i'm a littl econfused with this.

 

I have made an image upload class using some old code i have and and not sure about is

$_FILES['image']['tmp_name'];

 

How do i pass that to my function so i can do the resizing etc and looking at my code have i got far to go before i can upload an image and resize it?

 

<?php
class Upload_image {
var $percent;
var $new_width;
var $new_height;
var $width;
var $height;

function Upload_Image($percent,$new_width,$new_height,$width,$height) {
	$this->percent = $percent;
	$his->new_width = $new_width;
	$this->new_height = $new_height;
	$this->width = $width;
	$this->height = $height;
}

function upload_image($percent, $new_width, $new_height, $width, $height) {
	$imagepath = $_FILES['image']['tmp_name']; 

	// Load image 
	$image = open_image($imagepath); 

	if ($image == false) { 
		return ('<strong>You uploaded an invalid image. Please go back and try again.</strong>'); 
	} 

	// Get original width and height 
	$width = imagesx($image); 
	$height = imagesy($image); 

	// Percentage? 
	if (!empty($percent)) { 
		$percent = floatval($percent); 
		$percent = $percent/100; 

		$new_width = $width * $percent; 
		$new_height = $height * $percent; 

	// New width? Calculate new height 
	} elseif (!empty($new_width)) { 
		$new_width = floatval($new_width); 
		$new_height = $height * ($new_width/$width); 

	// New height? Calculate new width 
	} elseif (!empty($new_height)) { 
		$new_height = floatval($new_height); 
		$new_width = $width * ($new_height/$height); 

	// New height and new width 
	} elseif (!empty($height) AND !empty($width)) { 
		$new_height = floatval($_POST['height']); 
		$new_width = floatval($_POST['width']); 
	}     

	// Resample 
	$image_resized = imagecreatetruecolor($new_width, $new_height); 
	imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); 

	// Display resized image  
	imagejpeg($image_resized,$th_file_name,100); 
}

function open_image($file) { 
	# JPEG: 
	$im = @imagecreatefromjpeg($file); 
	if ($im !== false) { return $im; } 

	# GIF: 
	$im = @imagecreatefromgif($file); 
	if ($im !== false) { return $im; } 

	# PNG: 
	$im = @imagecreatefrompng($file); 
	if ($im !== false) { return $im; } 

	# GD File: 
	$im = @imagecreatefromgd($file); 
	if ($im !== false) { return $im; } 

	# GD2 File: 
	$im = @imagecreatefromgd2($file); 
	if ($im !== false) { return $im; } 

	# WBMP: 
	$im = @imagecreatefromwbmp($file); 
	if ($im !== false) { return $im; } 

	# XBM: 
	$im = @imagecreatefromxbm($file); 
	if ($im !== false) { return $im; } 

	# XPM: 
	$im = @imagecreatefromxpm($file); 
	if ($im !== false) { return $im; } 

	# Try and load from string: 
	$im = @imagecreatefromstring(file_get_contents($file)); 
	if ($im !== false) { return $im; } 

	return false; 
}
}
?>

[alexweber15]

$_FILES is a superglobal so it should be available anywhere in your application's scope, as in you don't really need to pass it to the function because it just exists in the global scope anyway