Example of parsing arguments in php cli

README.txt

Example: 

php -s "Hello world" -h md5
php --string "Hello world" --hash md5

Foo.php

<?php

class Hash
{

    protected $string;
    protected $hash;

    /**
     * Init arguments
     * @param array $argv cli arguments
     */
    public function __construct(array $argv)
    {
        $this->parseArgs($argv);
    }

    /**
     * Parse arguments
     * @param  array  $argv cli arguments
     * @return void exit if arguments are null
     */
    protected function parseArgs(array $argv)
    {
        array_shift($argv); // Remove argv[0] from the arguments

        $short_opts = 's:h:';
        $long_opts = array('string:', 'hash:');
        $options = getopt($short_opts, $long_opts);

        foreach(array_keys($options) as $key){
            if ($key === 's' || $key === 'string')
                $this->string = is_array($options[$key]) ? $options[$key][0] : $options[$key];

            if ($key === 'h' || $key === 'hash')
                $this->hash = is_array($options[$key]) ? $options[$key][0] : $options[$key];
        }

        if (is_null($this->string) || is_null($this->key)) {
            echo 'Missing arguments';
            die;
        }
    }

    /**
     * Hash string to md5 or sha1
     * @return string return hashed string
     */
    public function run()
    {
        switch ($this->hash) {
            case 'md5':
                print md5($this->string);
                break;

            case 'sha1':
                print sha1($this->string);
                break;
        }
    }
}