Questa funzione permette di scrivere un testo e di fonderlo con un’immagine esistente. Se l’immagine non esiste restituisce un’immagine con un messaggio di errore!

 
< ?php
 
/*** set the header for the image ***/
header("Content-type: image/jpeg");
 
/*** specify an image and text ***/
$im = writeToImage(‘test.jpg’, ‘PHPRO rules again’);
 
/*** spit the image out the other end ***/
imagejpeg($im);
 
/**
*
* @Write text to an existing image
*
* @Author Kevin Waterson
*
* @access public
*
* @param string The image path
*
* @param string The text string
*
* @return resource
*
*/
function writeToImage($imagefile, $text){
/*** make sure the file exists ***/
if(file_exists($imagefile))
{
/*** create image ***/
$im = @imagecreatefromjpeg($imagefile);
 
/*** create the text color ***/
$text_color = imagecolorallocate($im, 233, 14, 91);
 
/*** splatter the image with text ***/
imagestring($im, 6, 25, 150, "$text", $text_color);
}
else
{
/*** if the file does not exist we will create our own image ***/
/*** Create a black image ***/
$im = imagecreatetruecolor(150, 30); /* Create a black image */
 
/*** the background color ***/
$bgc = imagecolorallocate($im, 255, 255, 255);
 
/*** the text color ***/
$tc = imagecolorallocate($im, 0, 0, 0);
 
/*** a little rectangle ***/
imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
 
/*** output and error message ***/
imagestring($im, 1, 5, 5, "Error loading $imagefile", $tc);
}
return $im;
}
 
?>
 

fonte: www.sastgroup.com