PHP API is weird

fix-api.php

<?php

/**
 * Checks if a value exists in an array
 *
 * @param array $haystack
 * @param mixed $needle
 * @param bool $strict
 * @return bool
 */
function inarray(array $haystack, $needle, $strict = false) {
    return in_array($needle, $haystack, $strict);
}

/**
 * Find the position of the first occurrence of a substring in a string
 *
 * @param mixed $needle
 * @param string $haystack
 * @param int $offset
 * @return bool
 */
function str_pos($needle, $haystack, $offset = 0) {
    return strpos($haystack, $needle, $offset);
}

assert(in_array('a', ['a', 'b', 'c']) === inarray(['a', 'b', 'c'], 'a'));
assert(strpos('marco', 'a') === str_pos('a', 'marco'));