<?php

use PhpOption\None;
use PhpOption\Some;

class Before
{
    /**
     * @param mixed $param
     * @return null|int
     */
    public function find($param)
    {
        $value = null;
        
        if (!is_null($param)) {
            // result of your search by param
            $value = 1;
        }
        
        // 0 can be a result, null means nothing found
        return $value;
    }
}

class WithPhpOption
{
    /**
     * @param mixed $param
     * @return PhpOption\Option
     */
    public function find($param)
    {
        $value = None::create();
        
        if (!is_null($param)) {
            // result of your search by param
            $value = new Some(1);
        }
        
        return $value;
    }
}

$obj = new Before();
$value = $obj->find(null);
if (is_null($value)) {
    $value = 0;
}
echo $value . PHP_EOL;


$obj = new WithPhpOption();
echo $obj->find('mySearchValue')
    ->getOrElse(0) . PHP_EOL;
echo $obj->find(null)
    ->getOrElse(0) . PHP_EOL;

0
1
0

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PHP 8.3, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8