set max width and height when uploading image

[goldensebbe]

This is the code I use to upload an image to my database and my ftp it works great but I want to be able to set the max width and max height, how can I do that?


In header

<?php
session_start();

include("connect_to_mysql.php"); 

if (!isset($_SESSION['sess_user'])){
  header("Location: index.php");
  exit;
}

if (isset($_GET['logout'])){
  session_unset();
  session_destroy();
  header("Location: index.php");
  exit;
}
$upload_dir = 'files/';

$filetypes = 'jpg,jpeg,gif,png,bmp';


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


$userfile = $_FILES['userfile']['name'];



$types = explode(',',$filetypes);
$file = explode('.',$_FILES['userfile']['name']);
$extension = $file[sizeof($file)-1];

if(!in_array($extension,$types)) {

if($IngenBildSiffra == 1) {
echo "";
} else {
$notAllowedFileType = 1;
}
}

if(is_uploaded_file($_FILES['userfile']['tmp_name'])) {
move_uploaded_file($_FILES['userfile']['tmp_name'],$upload_dir.$_FILES['userfile']['name']);
}

$sql = "INSERT INTO CMS_bild (image) VALUES ('$userfile')";
mysql_query($sql);
header("Location: botright.php?sent");
exit();
}

?>


<script type="text/javascript"> 

function submit_form(valVar) { 
    // Sätter vald åtgärd till 'true' 
    document.getElementById(valVar).value = 'true'; 
    document.getElementById('formName').submit(); 
}
<?php

if ($added == 1){
echo "alert('Uppdateringen skedde utan problem.');\r\n";
$header = 1;
}


?>
// -->
</script>

On page

<?php



if(isset($_GET['sent'])) {
echo "Bilden <strong>".$_FILES['userfile']['name']."</strong> laddades upp utan problem!<br>";
}
if(isset($_GET['imageexist'])) {
echo "Bilden existerar redan.<br>";
}

}
?>

</td>
</tr>
</table>
</div>
<form method="post" action="<? echo "".$_SERVER['PHP_SELF'].""; ?>" enctype="multipart/form-data">

<tr>
<td>

Bild
</td> <td><input type="file" name="userfile" value="" /></td>
</tr>



<tr>
<td colspan="2"><input type="submit" name="submit" / value="Lägg upp bild"></td>

</tr>
</table>
</form>

[Belrick]

You can get height and width of an uploaded image by:
list($width, $height, $type, $attr) = getimagesize($image);

You can then test if greater than your maximums and either redraw the image for them or bounce back an error.

Hope this helps

[Dasher]

Or you set the max size in your html or css file for the page, and all images will be resized regardless of actual size. You can also set limits on the file size in bytes in your upload program, so they don't take too long to load in a browser.

[WolfShade]

Or you set the max size in your html or css file for the page, and all images will be resized regardless of actual size. You can also set limits on the file size in bytes in your upload program, so they don't take too long to load in a browser.

If the image needs to be 200 x 200, but what is uploaded is 1600 x 1600, sizing it down using HTML will look correct, but it is HIGHLY inefficient and not optimized for the web.