spintax.php

<?PHP
/**
 * Spintax - A helper class to process Spintax strings.
 * @name Spintax
 * @author Jason Davis - https://www.codedevelopr.com/
 * Tutorial: https://www.codedevelopr.com/articles/php-spintax-class/
 * Modified by Mark Larsen:
 * Added ability so that a fixed output can be returned.
 */
class Spintax
{
    protected $useFixedSeed = false;

    public function __construct( $bFixed = false, $cSeed = null )
    {
        if ($bFixed)
        {
            $this->useFixedSeed = $bFixed;
            if (null == $cSeed)
            {
                $cSeed = $_SERVER['REQUEST_URI'];
            }

            mt_srand( crc32( $cSeed ) );
        }

        return $this;
    }

    public function process($text)
    {
        return preg_replace_callback(
            '/\{(((?>[^\{\}]+)|(?R))*)\}/x',
            array($this, 'replace'),
            $text
        );
    }

    public function replace($text)
    {
        $text = $this->process($text[1]);
        $parts = explode('|', $text);

        // We want the same version returned each time
        if ($this->useFixedSeed)
        {
            // Need to use alternate method of selecting random element
            return $parts[ mt_rand(0, count($parts) - 1) ];
        }

        return $parts[ array_rand($parts) ];
    }
}


/* EXAMPLE USAGE */
$spintax = new Spintax();
$string = '{Hello|Howdy|Hola} to you, {Mr.|Mrs.|Ms.} {Smith|Williams|Davis}!';
echo $spintax->process($string);

/* NESTED SPINNING EXAMPLE */
echo $spintax->process('{Hello|Howdy|Hola} to you, {Mr.|Mrs.|Ms.} {{Jason|Malina|Sara}|Williams|Davis}');

/* Example of using Fixed method */
$spintaxFixed = new Spintax( true ); // Using default seed
// Will always bee the same value
echo $spintaxFixed->process($string);

// So will this (but differant to above)
echo $spintaxFixed->process($string);