Captcha image Text Size

Hi,

Learning PHP code; playing with various methods of generating captcha
codes:

In the code below, how would I change the size of the text displayed in
the captcha code?
Is it even possible with this method?
TIA,
Twayne

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<?php

session_start();

$width = 120;

$height = 40;

$length = 5;

$baseList = '23456789abcdfghjkmnpqrstvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ';

$code = "";

$counter = 0;

$image = @imagecreate($width, $height) or die('Cannot initialize GD!');

for( $i=0; $i<10; $i++ ) {

imageline($image,

mt_rand(0,$width), mt_rand(0,$height),

mt_rand(0,$width), mt_rand(0,$height),

imagecolorallocate($image, mt_rand(150,255),

mt_rand(150,255),

mt_rand(150,255)));

}

for( $i=0, $x=0; $i<$length; $i++ ) {

$actChar = substr($baseList, rand(0, strlen($baseList)-1), 1);

$x += 10 + mt_rand(0,10);

imagechar($image, mt_rand(3,5), $x, mt_rand(5,20), $actChar,

imagecolorallocate($image, mt_rand(0,155), mt_rand(0,155),
mt_rand(0,155)));

$code .= strtolower($actChar);

}


header('Content-Type: image/jpeg');

imagejpeg($image);

imagedestroy($image);

$_SESSION['securityCode'] = $code;

?>

\

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