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Image manipulation and PHP

Posted on 2009-04-11
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Last Modified: 2012-05-06
I have 2 images:

image1.jpg (650 x 300 px)
image2.jpg (10 x 10 px)

Basically I want PHP to place image2.jpg over the top of image1.jpg, in a certain place (e.g. 100w, 100h), then save the whole thing as a JPEG.

Any ideas how I can about doing this?

Many thanks.
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Question by:DReade83
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Ray Paseur earned 500 total points
ID: 24122620
http://us2.php.net/manual/en/function.imagecopymerge.php should get you started.  Can you please post the code you have so far?  Thanks, ~Ray
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Author Comment

by:DReade83
ID: 24122626
I haven't any code just yet. Is it possible to add some text over the top of the second image, and then save the whole thing as one image?
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by:Ray Paseur
Ray Paseur earned 500 total points
ID: 24122658
Yes, you can stack text or other images on top of a background image.  That function above does it for image stacking.  The imagestring() or imagestringup() functions can do it for text.  Then you can create the file with imagejpeg() and you're done.  There is a lot to be found in the GD functions for PHP.

Have a quick read of the functions on this page, and you will find almost everything you could desire!
http://us2.php.net/manual/en/ref.image.php

HTH, ~Ray
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Author Closing Comment

by:DReade83
ID: 31569202
Thanks Ray! :-)
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Expert Comment

by:Ray Paseur
ID: 24122685
Thanks for the points.  Here is a little code snippet that shows what I do to create a little image of a "captcha" number string.  If you look up the functions in the top part, you will get the gist of it quickly.

Cheers, ~Ray
<?php // CAPTCHA_NUMBER.PHP GENERATES A PICTURE OF A NUMBER

 $data	= base64_decode($_GET['dt']);

 $im	= imagecreate(46,13);

 $bg	= imagecolorallocate($im, 255,255,255);

 $gray	= imagecolorallocate($im, 188,188,188);

 $text	= imagecolorallocate($im, 178,34,34);  // firebrick

 imagestring($im,5,4,0,$data,$text);

 imageline($im,4,12,38,0,$gray);

 imagepng($im);

 imagedestroy($im);

?>
 
 
 
 
 
 

<html> <!-- GOES IN THE FORM SCRIPT -->

Type

<img style="display:inline;" src=captcha_number.php?dt=<?php $x = mt_rand(1000,10000); echo base64_encode($x);?> />

here:

<input type=hidden name='_newMd5' value="<?=md5($x)?>" />

&nbsp;

<input name="_newCode" type="text" maxlength="64" size="6" autocomplete="off" />
 
 
 
 
 
 
 

<?php // GOES IN THE ACTION SCRIPT

$newCode	= $_POST["_newCode"];

$newMd5		= $_POST["_newMd5"];

$newCode	= md5($newCode);

if ($newCode != $newMd5)

{

	die('Security code number did not match');

}

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Author Comment

by:DReade83
ID: 24122694
Nice! I'll have a go! Thanks mate!
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by:Ray Paseur
ID: 24122696
'Welcome!
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