PHP生成随机单词

class GenRandWords
{

    private static $_alphas = [
        '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',
    ];

    // 生成
    private $_num = 1;

    // 单词最小长度
    private $_minLength = 5;

    // 单词最大长度
    private $_maxLength = 20;

    public function __construct($config = [])
    {
        if (isset($config['num']) && $config['num'] > 0) {
            $this->_num = $config['num'];
        }

        if (isset($config['minLength']) && $config['minLength'] > 0) {
            $this->_minLength = $config['minLength'];
        }

        if (isset($config['maxLength']) && $config['maxLength'] > 0) {
            $this->_maxLength = $config['maxLength'];
        }
    }

    public function generate()
    {
        $words = [];
        $num = $this->_num;

        while ($num--) {
            $words[] = $this->_genOneWord();
        }

        return $words;
    }

    private function _genOneWord()
    {
        $word = '';

        $wordLength = mt_rand($this->_minLength, $this->_maxLength);

        while ($wordLength--) {
            $index = mt_rand(0, 25);
            $word .= self::$_alphas[$index];
        }

        return $word;
    }
}

用法：

$config = [
'num' => 100,
];

$genRandWords = new GenRandWords($config);

$words = $genRandWords->generate();