How do I resize the uploaded image?

Skipjackrick · February 9, 2010

So I've got this image script working well for me. But, I'd like to resize the image.

What do I use?

Here is the bit of code I think needs to be elaborated on but I've included the whole file if needed.

<?php
// make a unique filename for the uploaded file
$uploadFilename = $uploadsDirectory.$now.'_angler'.$anglerId.'_team'.$team.'.jpg';


// now let's move the file to its final and allocate it with the new filename
@move_uploaded_file($_FILES[$fieldname]['tmp_name'], $uploadFilename)
or error('receiving directory insuffiecient permission', $uploadForm);

$image_name = ''.$now.'_angler'.$anglerId.'_team'.$team.'.jpg';
?>

The rest of the file for reference.

<?php  // filename: upload.processor.php


// make a note of the current working directory, relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the directory that will recieve the uploaded files
$uploadsDirectory = $_SERVER['DOCUMENT_ROOT'] . $directory_self . 'submitted_pics/';

// make a note of the location of the upload form in case we need it
$uploadForm = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'photo.php';

// name of the fieldname used for the file in the HTML form
$fieldname = 'file';


if (!($_FILES[$fieldname]['type'] =='image/pjpeg' OR $_FILES[$fieldname]['type'] =='image/jpeg'))
{

header("Refresh: 5; URL=addaprofile_photos.php");
echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'."\n".
'"http://www.w3.org/TR/html4/strict.dtd">'."\n\n".
'<html lang="en">'."\n".
'	<head>'."\n".
'		<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">'."\n\n".
'		<link rel="stylesheet" type="text/css" href="stylesheet.css">'."\n\n".
'	<title>Upload error</title>'."\n\n".
'	</head>'."\n\n".
'	<body>'."\n\n".
'	<div id="Upload">'."\n\n".
'		<h1>Error: Only non-progressive JPG file types are accepted</h1>'."\n\n".
'		<p>Please Try Again: '."\n\n".
'		<span class="red">' . $error . '...</span>'."\n\n".
'	 	The upload form is reloading</p>'."\n\n".
'	 </div>'."\n\n".
'</html>';
exit;

} else {

// Now let's deal with the upload

// possible PHP upload errors
$errors = array(1 => 'php.ini max file size exceeded', 
                2 => 'html form max file size exceeded', 
                3 => 'file upload was only partial', 
                4 => 'no file was attached');

// check the upload form was actually submitted else print form
isset($_POST['submit'])
or error('the upload form is neaded', $uploadForm);

// check for standard uploading errors
($_FILES[$fieldname]['error'] == 0)
or error($errors[$_FILES[$fieldname]['error']], $uploadForm);

// check that the file we are working on really was an HTTP upload
@is_uploaded_file($_FILES[$fieldname]['tmp_name'])
or error('not an HTTP upload', $uploadForm);

  
// validation... since this is an image upload script we 
// should run a check to make sure the upload is an image
@getimagesize($_FILES[$fieldname]['tmp_name'])
or error('only image uploads are allowed', $uploadForm);

$now = time();
$anglerId = $_GET['anglerId'];
$team = $_GET['team'];

// make a unique filename for the uploaded file
$uploadFilename = $uploadsDirectory.$now.'_angler'.$anglerId.'_team'.$team.'.jpg';


// now let's move the file to its final and allocate it with the new filename
@move_uploaded_file($_FILES[$fieldname]['tmp_name'], $uploadFilename)
or error('receiving directory insuffiecient permission', $uploadForm);


$image_resolution = 'submitted_pics/'.$now.'_angler'.$anglerId.'_team'.$team.'.jpg';

//Check to make sure the resolution is accurate
      list($width, $height) = getimagesize($image_resolution);

      $widthMin  = 479;
      $heightMin = 479;

      if( ($width < $widthMin) || ($height < $heightMin) ) {
        $errorMessage = 'The minimum resolution for photos must be 640 x 480 pixels';

      $_SESSION['errorCount'] = 1;
      $_SESSION['errorMessage'] = $errorMessage;
      header("Location: team_error.php");
      exit;
      }

    
//if an error
echo(mysql_error()); 


$region = $_GET['region'];

// make a note of the location of the success page and call the team_id and region_id variables to pass
$uploadSuccess = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'exif_check.php?team_id=' . $team . '&region_id=' . $region . '';

// If you got this far, everything has worked and the file has been successfully saved.
// We are now going to redirect the client to the success page.
header('Location: ' . $uploadSuccess);


// make an error handler which will be used if the upload fails
function error($error, $location, $seconds = 5)
{
header("Refresh: $seconds; URL=\"$location\"");
echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'."\n".
'"http://www.w3.org/TR/html4/strict.dtd">'."\n\n".
'<html lang="en">'."\n".
'	<head>'."\n".
'		<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">'."\n\n".
'		<link rel="stylesheet" type="text/css" href="stylesheet.css">'."\n\n".
'	<title>Upload error</title>'."\n\n".
'	</head>'."\n\n".
'	<body>'."\n\n".
'	<div id="Upload">'."\n\n".
'		<h1>Upload failure</h1>'."\n\n".
'		<p>An error has occured: '."\n\n".
'		<span class="red">' . $error . '...</span>'."\n\n".
'	 	The upload form is reloading</p>'."\n\n".
'	 </div>'."\n\n".
'</html>';
exit;
} // end error handler
} // end if else statement concerning file type
?>

pudge1 · February 9, 2010

<?php
/*
* File: SimpleImage.php
* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 08/11/06
* Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
* 
* This program is free software; you can redistribute it and/or 
* modify it under the terms of the GNU General Public License 
* as published by the Free Software Foundation; either version 2 
* of the License, or (at your option) any later version.
* 
* This program is distributed in the hope that it will be useful, 
* but WITHOUT ANY WARRANTY; without even the implied warranty of 
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
* GNU General Public License for more details: 
* http://www.gnu.org/licenses/gpl.html
*
*/

class SimpleImage {
   
   var $image;
   var $image_type;

   function load($filename) {
      $image_info = getimagesize($filename);
      $this->image_type = $image_info[2];
      if( $this->image_type == IMAGETYPE_JPEG ) {
         $this->image = imagecreatefromjpeg($filename);
      } elseif( $this->image_type == IMAGETYPE_GIF ) {
         $this->image = imagecreatefromgif($filename);
      } elseif( $this->image_type == IMAGETYPE_PNG ) {
         $this->image = imagecreatefrompng($filename);
      }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image,$filename,$compression);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($this->image,$filename);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($this->image,$filename);
      }   
      if( $permissions != null) {
         chmod($filename,$permissions);
      }
   }
   function output($image_type=IMAGETYPE_JPEG) {
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($this->image);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($this->image);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($this->image);
      }   
   }
   function getWidth() {
      return imagesx($this->image);
   }
   function getHeight() {
      return imagesy($this->image);
   }
   function resizeToHeight($height) {
      $ratio = $height / $this->getHeight();
      $width = $this->getWidth() * $ratio;
      $this->resize($width,$height);
   }
   function resizeToWidth($width) {
      $ratio = $width / $this->getWidth();
      $height = $this->getheight() * $ratio;
      $this->resize($width,$height);
   }
   function scale($scale) {
      $width = $this->getWidth() * $scale/100;
      $height = $this->getheight() * $scale/100; 
      $this->resize($width,$height);
   }
   function resize($width,$height) {
      $new_image = imagecreatetruecolor($width, $height);
      imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
      $this->image = $new_image;   
   }      
}
?>

This is the code I used on my old image hosting site. I did not create it, found it online.

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How do I resize the uploaded image?

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