Resize Images

[123guy]

hello. I am trying to find a code that will resize an image to 600px wide, with the height scaling to it. I have been google this for awhile, but all I can find is info on how to display it as a different size. I need to be able to upload from a foreach loop, multiple images, with a smaller image....so that it saves as a smaller file size. so lets say the original is a 60" X 60"....I want my code to scale it down to a 10" X 10"(for example). I need it so that when uploaded, the file size is smaller as to allow the image to load faster. I don't think this makes much sense, but if it does, could you help me out with this?

[123guy]

I guess even if it isn't resized, but there is a way to make the file size smaller, that could work too...but I don't think thats possible

[Jessica]

I can't imagine what you searched for that you *didn't* find a dozen tutorials on this subject.

http://lmgtfy.com/?q=php+resize+image

 

Try again and come back when you get stuck at a bug.

[123guy]

Ok, I was just never able to find anything that worked...I didn't realize I had the GD library until I found a code to test it out. any ways, I want this code from this website:

http://bgallz.org/502/php-upload-resize-image/

 

but I need to know how I can do a foreach for the images...it says can't redeclare...how would I do this as a foreach...or at least able to save more than one file. thanks in advance

[123guy]

btw, this is the code I have modified a bit:

<?php
// upload the file


if (isset($_POST["submit"])){





// index.php
function generate_resized_image(){
$max_dimension = 600; // Max new width or height, can not exceed this value.
$dir = "../images/"; // Directory to save resized image. (Include a trailing slash - /)
// Collect the post variables.
$postvars = array(
"image"    => trim($_FILES["image"]["name"]),
"image_tmp"    => $_FILES["image"]["tmp_name"],
"image_size"    => (int)$_FILES["image"]["size"],
"image_max_width"    => (int)$_POST["image_max_width"],
"image_max_height"   => (int)$_POST["image_max_height"]
);
// Array of valid extensions.
$valid_exts = array("jpg","jpeg","gif","png");
// Select the extension from the file.
$ext = end(explode(".",strtolower(trim($_FILES["image"]["name"]))));
// Check not larger than 175kb.
if($postvars["image_size"] <= 100000000000000000000){
// Check is valid extension.
if(in_array($ext,$valid_exts)){
if($ext == "jpg" || $ext == "jpeg"){
$image = imagecreatefromjpeg($postvars["image_tmp"]);
}
else if($ext == "gif"){
$image = imagecreatefromgif($postvars["image_tmp"]);
}
else if($ext == "png"){
$image = imagecreatefrompng($postvars["image_tmp"]);
}
// Grab the width and height of the image.
list($width,$height) = getimagesize($postvars["image_tmp"]);
// If the max width input is greater than max height we base the new image off of that, otherwise we
// use the max height input.
// We get the other dimension by multiplying the quotient of the new width or height divided by
// the old width or height.
if($postvars["image_max_width"] > $postvars["image_max_height"]){
if($postvars["image_max_width"] > $max_dimension){
$newwidth = $max_dimension;
} else {
$newwidth = $postvars["image_max_width"];
}
$newheight = ($newwidth / $width) * $height;
} else {
if($postvars["image_max_height"] > $max_dimension){
$newheight = $max_dimension;
} else {
$newheight = $postvars["image_max_height"];
}
$newwidth = ($newheight / $height) * $width;
}
// Create temporary image file.
$tmp = imagecreatetruecolor($newwidth,$newheight);
// Copy the image to one with the new width and height.
imagecopyresampled($tmp,$image,0,0,0,0,$newwidth,$newheight,$width,$height);
// Create random 4 digit number for filename.
$rand = rand(1000,9999);
$filename = $dir.$rand.$postvars["image"];
// Create image file with 100% quality.
imagejpeg($tmp,$filename,100);
return "<strong>Image Preview:</strong><br/>
<img src=\"".$filename."\" border=\"0\" title=\"Resized  Image Preview\" style=\"padding: 4px 0px 4px 0px;background-color:#e0e0e0\" /><br/>
Resized image successfully generated. <a href=\"".$filename."\" target=\"_blank\" name=\"Download your resized image now!\">Click here to download your image.</a>";
imagedestroy($image);
imagedestroy($tmp);
} else {
return "File size too large. Max allowed file size is .";
}
} else {
return "Invalid file type. You must upload an image file. (jpg, jpeg, gif, png).";
}
}











 mysql_query("INSERT INTO images (item_id, image)
VALUES ('$id123', 'images/".$remote_file1."')");



$title = $_POST['title'];

$des = mysql_real_escape_string($_POST['description']);
$price = mysql_real_escape_string($_POST['price']);
$qty = mysql_real_escape_string($_POST['quantity']);
$cat2 = mysql_real_escape_string($_POST['category2']);
$cat = mysql_real_escape_string($_POST['category']);


if ($cat2 !='')
{$cat = $cat2; }

mysql_query("INSERT INTO items (id, name, price, description, quantity, category_id, image)
VALUES ('$id123', '$title', '$price','$des', '$qty', '$cat', 'images/".$remote_file1."')");
if($cat2 !=''){
mysql_query("INSERT INTO categories (category)
VALUES ('$cat2')");
exit;
}
  }



?>

<form action="newprod.php?do=upload" method="post" enctype="multipart/form-data" name="form1">
<table width="0" border="0" cellspacing="2" cellpadding="2">
 <tr>
   <td width="69">

   <tr>
         <td>Name:</td>
         <td width="301"><div align="left">
           <input name="title" type="text" />
         </div></td>
   </tr>
       <tr>
         <td>Price:</td>
         <td><div align="left"><input name="price" type="text" /></div></td>
       </tr>
       <tr>
         <td>Quantity:</td>
         <td><div align="left"><input name="quantity" type="text" /></div></td>
       </tr>
       <tr>
         <td>Description:</td>
         <td><div align="left"><textarea name="description" cols="" rows=""></textarea></div></td>
       </tr>
        <tr>
         <td>Main Picture:</td>
         <td>
<input name="file1[]" type="file" /></td>
       </tr>
       <tr>
         <td>Picture:</td>
         <td>
<input name="image" type="file" multiple="multiple" /></td>
       </tr>
        <tr>
         <td>Category:</td>
         <td><div align="left">
           <label for="category"></label>

           <select name="category" id="category">
           <option value="">---Choose Category---</option>

           <?php 
$result = mysql_query("SELECT * FROM categories");

while($row = mysql_fetch_array($result))
 {
$category = $row['category'];
$id = $row['id'];

?>
<option value="<?php echo $category; ?>"><?php echo $category; ?></option>

<?php }
?>
           </select>
           <br />
           or make new category (leave blank if option is already selected):<br />
           <label for="category2"></label>
         <input type="text" name="category2" id="category2" />
         </td>
   </tr>
   <tr>
     <td> </td>
      <input name="image_max_width" type="hidden" id="image_max_width" value="600" size="4">


     <input name="image_max_height" type="hidden" id="image_max_height" value="1000000" size="4">
         </td>
   </tr>
       <tr>
         <td> </td>
     <td><div align="left"><input type="submit" name="submit" id="submit" value="Save"  /></div></td>
       </tr>
 </table>

</form>
<?php

if(isset($_GET['do']) && $_GET['do'] == "upload")
{

$upload_and_resize = generate_resized_image();
echo '<div id="upload">'. $upload_and_resize. '</div>';

}

?>

 

I know I will need to change image to image[](right?). can anyone help me out with this?