PHP: Text Spinner Class - Nested spinning supported.

spintax.php

<?PHP

/**
 * Spintax - A helper class to process Spintax strings.
 */
class Spintax
{
    /**
     * Set seed to make the spinner predictable. 
     */
    public function seed(mixed $seed)
    {
        mt_srand(crc32($seed));
    }

    public function process(string $text)
    {
        return preg_replace_callback(
            '/\{(((?>[^\{\}]+)|(?R))*?)\}/x',
            function ($match) {
                $text = $this->process($match[1]);
                $parts = explode('|', $text);

                return $parts[mt_rand(0, count($parts) - 1)];
            },
            $text
        );
    }

    /**
     * If you want highest randomness,
     * this is the method to use.
     * Note: Seed has no effect.
     *
     * Last updated: 2023-10-26
     */
    public function spin(string $text)
    {
        $pattern = '/{([^{}]+)}/';
        while (preg_match($pattern, $text)) {
            $text = preg_replace_callback($pattern, function ($matches) {
                $options = explode('|', $matches[1]);

                return $options[ random_int(0, count($options) - 1) ];
            }, $text);
        }

        return $text;
    }
}


/* 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}');

is posible? {
Mensaje001
|Mensaje 002
{
Mensaje 002-1
|
Mensaje 002-2
}
}
To infinity data spintax.

Hello! Generally class working great even with 3rd or 4th nesting level. But i think there is some mysterious bug.

Spintax works fine with short texts, but when text is longer than 8.000 character (whole text including synonims in brackets {}) then class cause HTTP errors (connecion reset).

I make a test in separated file where was only class definition, one object and variable with text.

Can somone help me with this?

In php ini i have declared 2GB of ram and unlimited time of execution.

Regards!

I guess we could make the asterisk lazy for a little performance boost '/{(((?>[^\{\}]+)|(?R))*?)}/x'.

/\{(((?>[^\{\}]+)|(?R))*)\}/x 816 matches, 11424 steps (~30ms)

/\{(((?>[^\{\}]+)|(?R))*?)\}/x 816 matches, 9792 steps (~13ms)

I guess we could make the asterisk lazy for a little performance boost '/{(((?>[^{}]+)|(?R))*?)}/x'.

I forked this optimized solution and added seed rand in order to fix the spin text with srand.

Hello!

Great job. It is helping me a lot!

I'm trying to get the parts of the spintax text separately, but I only get the ones between {}

For example, in this text:
{Hi|Hello}{ Mr.|} Irfaq Syed. {How are you?|How about the day?}

I get:
{Hi | Hello}
{Mr. |}
{How are you? | How about the day?}

But not the text in the middle, that is, I don't get:

Irfaq Syed.

There is any Regex to get all, the spintax groups and the plain text?

Thanks!

Very interesting!
How to make the reverse?
Input: Hello to you, Mr. Smith!
Output: {Hello|Howdy|Hola} to you, {Mr.|Mrs.|Ms.} {Smith|Williams|Davis}!

how to output an array of all possible combinations?