<?
session_start();
$width = 180; $height=40;$inverse=0;
/*
$AlphabetNum = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","1","2","3","4","5","6","7","8","9");
$phrase = "";$i = 0;
while ($i < 6) { $phrase .= strtoupper($AlphabetNum[rand(0,count($AlphabetNum)-1)]); $i++; }
$_SESSION['CodePost'] = $phrase;
//$phrase = sprintf("%02d%s%01d%s%s%02d",rand(0,99),strtoupper($Alphabet[rand(0,25)]),rand(0,9),strtoupper($Alphabet[rand(0,25)]),strtoupper($Alphabet[rand(0,25)]),rand(0,99));
*/
$phrase = $_SESSION['CodePost'];
 #-- initialize in-memory image with gd library
srand(microtime()*21017);
$Image = imagecreatetruecolor($width, $height) or die ("Impossible d'initialiser la bibliothèque GD");
$R = $inverse ? 0xFF : 0x00;
imagefilledrectangle($Image, 0,0, $width, $height, random_color($Image, 222^$R, 255^$R));
$c1 = rand(150^$R, 185^$R);
$c2 = rand(195^$R, 230^$R);

//$font = dirname($_SERVER["SCRIPT_FILENAME"])."/college.ttf";
$font = dirname($_SERVER["SCRIPT_FILENAME"])."/scrawl.ttf";

/* Définission de la variable d'environnement pour GD */
//putenv('GDFONTPATH=' . realpath('.'));

/* Nom de la police à utiliser (notez l'absence de l'extension .ttf) */
//$font = "college";

#-- encolour bg
$wd = 20;
$x = 0;
while ($x < $width) {
	imagefilledrectangle($Image, $x, 0, $x+=$wd, $height, random_color($Image, 222^$R, 255^$R));
	$wd += max(10, rand(0, 20) - 10);
}

#-- make interesting background I, lines
$wd = 4;
$w1 = 0;
$w2 = 0;
for ($x=0; $x<$width; $x+=(int)$wd) {
	if ($x < $width) {   // verical
		imageline($Image, $x+$w1, 0, $x+$w2, $height-1, random_color($Image,$c1,$c2));
	}
	if ($x < $height) {  // horizontally ("y")
		imageline($Image, 0, $x-$w2, $width-1, $x-$w1, random_color($Image,$c1,$c2));
	}
	$wd += rand(0,8) - 4;
	if ($wd < 1) { $wd = 2; }
	$w1 += rand(0,8) - 4;
	$w2 += rand(0,8) - 4;
	if (($x > $height) && ($x > $height)) {
		break;
	}
}

#-- more disturbing II, random letters
$limit = rand(30,90);
for ($n=0; $n<$limit; $n++) {
	$letter = "";
	do {
		$letter .= chr(rand(31,125)); // random symbol
	} while (rand(0,1));
	$size = rand(5, $height/2);
	$half = (int) ($size / 2);
	$x = rand(-$half, $width+$half);
	$y = rand(+$half, $height);
	$rotation = rand(60, 300);
	$c1  = random_color($Image, 130^$R, 240^$R);
	//$font = $fonts[rand(0, count($fonts)-1)];
	imagettftext($Image, $size, $rotation, $x, $y, $c1, $font, $letter);
}

#-- add the real text to it
$len = strlen($phrase);
$w1 = 10;
$w2 = $width / ($len+1.5);
for ($p=0; $p<$len; $p++) {
	$letter = $phrase[$p];
	$size = rand(18, $height/2.2);
	$half = (int) $size / 2;
	$rotation = rand(-33, 33);
	$y = rand($size+3, $height-3);
	$x = $w1 + $w2*$p;
	$w1 += rand(-$width/90, $width/40);  // @BUG: last char could be +30 pixel outside of image
	//$font = $fonts[rand(0, count($fonts)-1)];
	$r=rand(30,99); $g=rand(30,99); $b=rand(30,99); // two colors for shadow
	$c1  = imagecolorallocate($Image, $r*1^$R, $g*1^$R, $b*1^$R);
	$c2  = imagecolorallocate($Image, $r*2^$R, $g*2^$R, $b*2^$R);
	$c3  = imagecolorallocate($Image, 150, 120, 90);
	//imagestring ($Image, round(rand(3,10)), $x, $y-20,  $letter, $c3);
	imagettftext($Image, $size, $rotation, $x+1, $y, $c2, $font, $letter);
	imagettftext($Image, $size, $rotation, $x, $y-1, $c1, $font, $letter);
}

header ("Content-type: image/jpeg");

/* si votre serveur ne manage pas les police ttf 
alors decommenter le code ce dessous */

/*
imagedestroy($Image);
$Image = @imagecreate (60, 20) or die ("Impossible d'initialiser la bibliothèque GD");
$CouleurFond = imagecolorallocate ($Image, 200, 200, 200);
$CouleurTexte = imagecolorallocate ($Image, 120, 120, 120);
imagestring ($Image, 3, 3, 3,  $phrase, $CouleurTexte);
*/

imagejpeg ($Image,"",90);
imagedestroy($Image);

function random_color($Image, $a,$b) {
	return imagecolorallocate($Image, rand($a,$b), rand($a,$b), rand($a,$b));
}
?>