<?php
session_start();
$text = rand(1000,9999);
$_SESSION["vercode"] = $text;
$height = 25;
$width = 65;

$image_p = imagecreate($width, $height);
$black = imagecolorallocate($image_p, 0, 0, 0);
$white = imagecolorallocate($image_p, 255, 255, 255);
$font_size = 15;

imagestring($image_p, $font_size, 5, 5, $text, $white);
imagejpeg($image_p, null, 180);
?>