Get a value from an associative array or object, or return default.

get.php

<?php

/**
 * Get a value from an associative array or object, or return default.
 *
 * @param    string        $key      Dot-separated path to key you wish to extract.
 * @param    array|object  $hash     Associative array or object.
 * @param    mixed         $default  Value to return if key is non-existent.
 * @param    bool          $is_int   Only return key if value is integer.
 * @return   mixed
 *
 * @example  $email = get('email', $_POST);
 * @example  $email = get('response.author.email', $json);
 */

function get($key, $hash, $default = null, $is_int = false)
{
    if (!is_array($hash) && !is_object($hash)) {
        return $default;
    }

    $hash = (array) $hash;
    $keys = explode('.', $key);
    $key = array_shift($keys);
    $return = $default;

    if (isset($hash[$key])) {
        $return = $hash[$key];

        if (count($keys)) {
            return get(implode('.', $keys), $hash[$key], $default, $is_int);
        } else {
            $return = $is_int ? (is_numeric($return) ? (int) $return : $default) : $return;
        }
    }

    return $return;
}