如何将 Codeigniter-2 验证码生成为有意义的词而不是代码？

Question

我了解到默认情况下 codeigniter-2 只能生成 字母数字 类型的验证码。我如何扩展它以生成有意义的 word ?

例如：

1. morning
2. overlooking
3. 等等

生成验证码的代码示例：

$vals = array(
                'img_path'      => './assets/captcha/',
                'img_url'       => 'http://url/assets/captcha/',
                'img_width'     => '130',
                'font_path'     => './assets/fonts/Moms_typewriter.ttf',
                'img_height'    => '33',
                'expiration'    => CAPTCHA_MAX_TIME_EXPIRATION
                );

$cap = create_captcha($vals);

Answer 1

只需使用 array 并通过循环传递元素

<?php

    $ab = array('Morning','Night','welcome','im here');

    $word = '';
    $n = 0;
    while ($n < 1)
    {
        $word .= $ab[mt_rand(0,9)];
        $n++;
    }


    $vals = array(
        'word'          => $word,
        'img_path'      => './assets/captcha/',
        'img_url'       => base_url().'assets/captcha/',
        'img_width'     => '130',
        'font_path'     => './assets/fonts/Moms_typewriter.ttf',
        'img_height'    => '33',
        'expiration'    => CAPTCHA_MAX_TIME_EXPIRATION
    );