php制作验证码图片-PHP源码

php制作验证码图片-PHP源码

1. [代码]制作随机字符串

';

$chars = join("",array_merge(range("a","z"),range("A","Z"),range("0","9")));
$chars = str_shuffle($chars);
echo $chars;

foreach (range(0, 12) as $number) {
    echo $number,'
';
}
?>

2. [代码]利用GD库制作验证码

3. [代码]效果测试