Save image from imagecreatefromjpg

[Mateobus]

Hey all,

I am trying to implement a captcha on my website. Rather than creating the image on the fly, I would like to have a database of the captcha codes, and a thousand or so associated images.  I was wondering if anyone knew how to save an image to a directory on the server, after it has been created with the imagecreatefrompng or imagecreatefromjpg function.  Here is the code i found from a tutorial

 

<?php
/*
Now for the GD stuff, for ease of use lets create
the image from a background image.
*/

$captcha = imagecreatefrompng("./captcha.png");

/*
Lets set the colours, the colour $line is used to generate lines.
Using a blue misty colours. The colour codes are in RGB
*/

$black = imagecolorallocate($captcha, 0, 0, 0);
$line = imagecolorallocate($captcha,233,239,239);

/*
Now to make it a little bit harder for any bots to break, 
assuming they can break it so far. Lets add some lines
in (static lines) to attempt to make the bots life a little harder
*/
imageline($captcha,0,0,39,29,$line);
imageline($captcha,40,0,64,29,$line);
?> 

 

so, i was planning on putting that in a loop and saving the images in a folder.  Maybe not the most secure way, but its the most efficient. Does anyone know how to move that file to a non-temporary directory on the server?

[bibby]

Mateobus,

The write out function would be imagepng() .

http://us2.php.net/manual/en/function.imagepng.php

 

So right where you've left off (or in your loop) ...

 

// path to save, dir must be 777 , you are web-user not "you"
$captcha_path = '/home/you/www/project/path/captcha/'.

//save the file
imagepng($captcha , $captcha_path.'filename.png');

 

imagepng() also be used with headers (see php.net examples) to send an image like this..

<img src="captcha.php">

, but there can be no other output.

 

If you do decide to premake images (and I don't think that you should) , get friendly also with opendir() , readdir() , and the holy file_exists() .

[Mateobus]

Great, thanks for the help.  I was wondering why you would not suggest saving the images first?