Código PHP:
require_once("config.php");
// Generate Reference ID
if (isset($_GET["refid"]) && !empty($_GET["refid"])) {
$referenceid = stripslashes($_GET["refid"]);
} else {
$referenceid = md5(mktime()*rand());
}
// Select Font
$font = "Century.ttf";
// Select random background image
$bgurl = rand(1, 3);*/
$im = ImageCreateFromPNG("images/bg".$bgurl.".png"); // LINEA 27
//Generate the random string
$chars = array("a","A","b","B","c","C","d","D","e","E","f","F","g","G","h","H","i","I","j","J","k",
"K","l","L","m","M","n","N","o","O","p","P","q","Q","r","R","s","S","t","T","u","U","v",
"V","w","W","x","X","y","Y","z","Z","1","2","3","4","5","6","7","8","9");
$length = 5;
$textstr = "";
for ($i=0; $i<$length; $i++) {
$textstr .= $chars[rand(0, count($chars)-1)];
}
// Create random size, angle, and dark color
$size = rand(12, 16);
$angle = rand(-5, 5);
$color = ImageColorAllocate($im, rand(0, 100), rand(0, 100), rand(0, 100));
// Determine text size, and use dimensions to generate x & y coordinates
$textsize = imagettfbbox($size, $angle, $font, $textstr);
$twidth = abs($textsize[2]-$textsize[0]);
$theight = abs($textsize[5]-$textsize[3]);
$x = (imagesx($im)/2)-($twidth/2)+(rand(-20, 20));
$y = (imagesy($im))-($theight/2);
// Add text to image
ImageTTFText($im, $size, $angle, $x, $y, $color, $font, $textstr);
// Output PNG Image
header("Content-Type: image/png");
/*ImagePNG($im);*/
// Destroy the image to free memory
imagedestroy($im);
// Insert reference into database, and delete any old ones
// Create reference
mysql_query("INSERT INTO $secure_image (insertdate, referenceid, hiddentext) VALUES (
now(), '".$referenceid."', '".$textstr."')");
// Delete references older than 1 day
mysql_query("DELETE FROM $secure_image WHERE insertdate < date_sub(now(), interval 1 day)");
// End Output
exit;
El código de arriba es un script que me pasaron pero al ejecutarlo me da el siguiente error:
Fatal error: Call to undefined function: iimagecreatefrompng() ... on line 27
La linea 42 la que marcado arriba, espero me puedan ayudar saludos