issue

search.php

<?php
// You only have to pass the necessary arguments
WrapperForExampleApi::search(['arg2' => 'x', 'arg4' => 'x']);

/**
 * hand-written wrapper class for ExampleApi
 */
class WrapperForExampleApi
{
    public static function search()
    {
        $args = self::defaultArguments();
        $passed = func_get_args()[0];
        $merged = array_merge($args, $passed);

        return call_user_func_array([new ExampleApi, 'search'], $merged);
    }

    private static function defaultArguments()
    {
        $exampleApi = new ExampleApi;
        $method = new \ReflectionMethod($exampleApi, 'search');

        $arguments = [];
        foreach ($method->getParameters() as $parameter) {
            $arguments[$parameter->getName()] = $parameter->getDefaultValue();
        }

        return $arguments;
    }
}


/**
 * auto-generated api class
 */
class ExampleApi
{
    public function search($arg1 = null, $arg2 = null, $arg3 = null, $arg4 = null)
    {
        var_dump('$arg1 = ' . $arg1);
        var_dump('$arg2 = ' . $arg2);
        var_dump('$arg3 = ' . $arg3);
        var_dump('$arg4 = ' . $arg4);
    }
}