Solved

image upload and resize

Posted on 2009-04-10
7
287 Views
Last Modified: 2013-12-12
i have a few questions...  below is my current code for resizing my images


my first question would be what would be the best size to use for a profile picture/avator ??  at the moment is have $modwidth = 200; but if i have a long picture then it looks too big..if you upload a picure nearly in all perportions then it looks great... is there anyway to make it more perpotionate or anything?

my second question would be how could i stop anything but images beeing uploaded?

3rd;y is there any more enhnace ments any 1 can suggest?
<?php
error_reporting(E_ALL); 
session_start();
require_once '../settings.php';
include "../info.php"; // sets username/id ect
?><form action="<?php echo $_server['php-self'];  ?>" method="post" enctype="multipart/form-data" id="something" class="uniForm">
        <input name="new_image" id="new_image" size="30" type="file" class="fileUpload" />
        <button name="submit" type="submit" class="submitButton">Upload/Resize Image</button>
</form>
<?php
        if(isset($_POST['submit'])){
          if (isset ($_FILES['new_image'])){
              			  $file_name = $_FILES['new_image']['name'];
			   	$getExt = explode ('.', $file_name);
               	$file_ext = $getExt[count($getExt)-1];
				$imagename = "$id.$file_ext";
				
              $source = $_FILES['new_image']['tmp_name'];
              $target = "images/$id.$file_ext";
			  
              move_uploaded_file($source, $target);
 
              $imagepath = $imagename;
              $save = "images/thumbs/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 200; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
			  imagejpeg($tn, $save, 100) ; 
 
              $imagepath = $imagename;
              $save = "images/mini/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 80; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;  
 
              imagejpeg($tn, $save, 100) ; 
			  
			  
			  $imagepath = $imagename;
              $save = "images/tiny/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 40; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
 
              imagejpeg($tn, $save, 100) ; 
			  $sql = "UPDATE `users` SET image = '".$id.".".$file_ext."' WHERE ID=$id";
mysql_query($sql) or die(mysql_error());
			  
            echo "Large image: <img src='images/thumbs/".$imagepath."'><br>"; 
            echo "MINI: <img src='images/mini/".$imagepath."'>"; 
			echo "TINY: <img src='images/tiny/".$imagepath."'><br>";  
 
          }
        }
?>

Open in new window

0
Comment
Question by:runnerjp
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
7 Comments
 
LVL 9

Accepted Solution

by:
Mahdii7 earned 250 total points
ID: 24120295
Answers to 1 & 2
<?php
error_reporting(E_ALL); 
session_start();
require_once '../settings.php';
include "../info.php"; // sets username/id ect
?><form action="<?php echo $_server['php-self'];  ?>" method="post" enctype="multipart/form-data" id="something" class="uniForm">
        <input name="new_image" id="new_image" size="30" type="file" class="fileUpload" />
        <button name="submit" type="submit" class="submitButton">Upload/Resize Image</button>
</form>
<?php
        if(isset($_POST['submit'])){
          if (isset ($_FILES['new_image'])){
                                  $file_name = $_FILES['new_image']['name'];
                                $getExt = explode ('.', $file_name);
                $file_ext = $getExt[count($getExt)-1];
				// Adding extension verification
				$allowed_ext = "|jpg|png|gif|jpeg|svg|bmp|";
				if (!strpos($allowed_ext, "|".$file_ext."|")) die("Extension: $file_ext is not allowed!");		
				// End extension verification		
                                $imagename = "$id.$file_ext";
                                
              $source = $_FILES['new_image']['tmp_name'];
              $target = "images/$id.$file_ext";
                          
              move_uploaded_file($source, $target);
 
              $imagepath = $imagename;
              $save = "images/thumbs/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              // Adding proportionate image resizing, with max values
			  
			  /*
			  $modwidth = 200; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              */
			  
			  $max_w = 200;
			  $max_h = 200;
			  
			  if($width <= $max_w && $height <= $max_h){ // if it fits
	             $modheight = $height; 
				 $modwidth = $width;
			  }else{ // Then resize
			  	$diff = ($width > $height) ? ($width/$max_w) :  ($height/$max_h); // Check which is bigger, and fit it to that max value. This will prevent stretching (80x800)
	            $modheight = $height / $diff; 
				$modwidth = $width / $diff;
			  }
			  
			  // End 
			  
			  $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
                          imagejpeg($tn, $save, 100) ; 
 
              $imagepath = $imagename;
              $save = "images/mini/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 80; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;  
 
              imagejpeg($tn, $save, 100) ; 
                          
                          
                          $imagepath = $imagename;
              $save = "images/tiny/" . $imagepath; //This is the new file you saving
              $file = "images/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 40; 
 
              $diff = $width / $modwidth;
 
              $modheight = $height / $diff; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
 
              imagejpeg($tn, $save, 100) ; 
                          $sql = "UPDATE `users` SET image = '".$id.".".$file_ext."' WHERE ID=$id";
mysql_query($sql) or die(mysql_error());
                          
            echo "Large image: <img src='images/thumbs/".$imagepath."'><br>"; 
            echo "MINI: <img src='images/mini/".$imagepath."'>"; 
                        echo "TINY: <img src='images/tiny/".$imagepath."'><br>";  
 
          }
        }
?>

Open in new window

0
 
LVL 19

Expert Comment

by:Michael701
ID: 24120899
Hello Mahdii7,

Take a look at pathinfo() to extract the extension.



<?php 
 
$path_parts = pathinfo("/www/htdocs/index.html"); 
 
echo $path_parts["dirname"] . "\n"; 
echo $path_parts["basename"] . "\n"; 
echo $path_parts["extension"] . "\n"; 
 
?>

Open in new window

0
 

Author Comment

by:runnerjp
ID: 24121423
ermm for some reason with the below code it says Extension: jpg is not allowed! :S:S
      // Adding extension verification
                                $allowed_ext = "|jpg|png|gif|jpeg|svg|bmp|";
                                if (!strpos($allowed_ext, "|".$file_ext."|")) die("Extension: $file_ext is not allowed!");  

Open in new window

0
PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

 
LVL 19

Expert Comment

by:Michael701
ID: 24122048
I bet it's a case issue


if (!strpos($allowed_ext, "|".strtolower($file_ext)."|"))


oh it's NOT a case issue

if (strpos($allowed_ext, "|".strtolower($file_ext)."|")!==false)

---
strpos was returning 0 (first position of the string), that's different than false (not found)
0
 

Author Comment

by:runnerjp
ID: 24125723
i chnaged it to if (strpos($allowed_ext, "|".strtolower($file_ext)."|")!==false) and i still get Extension: jpg is not allowed!
0
 
LVL 19

Assisted Solution

by:Michael701
Michael701 earned 250 total points
ID: 24126166
this is one of those LOL moments

normally I think

if (good extension)
{
  do something
}

but you want your program to die

so let's reverse the logic
$allowed_ext = "|jpg|png|gif|jpeg|svg|bmp|";
if (strpos($allowed_ext, "|".strtolower($file_ext)."|")===false) 
  die("Extension: $file_ext is not allowed!");  

Open in new window

0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
The viewer will learn how to count occurrences of each item in an array.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question