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 Post subject: GD code runs REEL slow
PostPosted: Thu Jun 05, 2008 6:21 pm 
Forum Newbie

Joined: Thu Jun 05, 2008 6:07 pm
Posts: 2
Below is a small script that I am thinking of using for sign on verification (you know the letters with a background that new users need to enter to signup)

The problem is to draw this image takes almost 6 seconds.

Is there some PHP configuration I can change to speed this up?

Note: I have attached the background file if you want to test your spped.

------ code follows ---------------------------


// make a string with all the characters that we
// want to use as the verification code

// generate the verication code
$rand = substr(str_shuffle($alphanum), 0, 5);

// create an image object using the chosen background
$image = imagecreatefromjpeg("background1.jpg");

$textColor = imagecolorallocate ($image, 0, 0, 0);

// write the code on the background image
imagestring ($image, 5, 5, 8, $rand, $textColor);

// create the hash for the verification code
// and put it in the session
$_SESSION['image_random_value'] = md5($rand);

// send several headers to make sure the image is not cached
// taken directly from the PHP Manual

// Date in the past
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

// always modified
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

// HTTP/1.1
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);

// HTTP/1.0
header("Pragma: no-cache");

// send the content type header so the image is displayed properly
header('Content-type: image/jpeg');

// send the image to the browser

// destroy the image to free up the memory

background1.jpg [ 1.81 KiB | Viewed 2417 times ]
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