<?php

namespace app\hejiang;

if (!function_exists('env')) {
    /**
     * Gets the value of an environment variable.
     *
     * @param  string  $key
     * @param  mixed   $default
     * @return mixed
     */
    function env($key, $default = null)
    {
        $value = getenv($key);

        if ($value === false) {
            return value($default);
        }

        switch (strtolower($value)) {
            case 'true':
            case '(true)':
                return true;
            case 'false':
            case '(false)':
                return false;
            case 'empty':
            case '(empty)':
                return '';
            case 'null':
            case '(null)':
                return;
        }

        if (strlen($value) > 1 && str_starts_with($value, '"') && str_ends_with($value, '"')) {
            return substr($value, 1, -1);
        }

        return $value;
    }
}

if (!function_exists('value')) {
    /**
     * Return the default value of the given value.
     *
     * @param  mixed  $value
     * @return mixed
     */
    function value($value)
    {
        return $value instanceof Closure ? $value() : $value;
    }
}

if (!function_exists('str_starts_with')) {
    /**
     * Determine if a given string starts with a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    function str_starts_with($haystack, $needles)
    {
        foreach ((array) $needles as $needle) {
            if ($needle !== '' && substr($haystack, 0, strlen($needle)) === (string) $needle) {
                return true;
            }
        }

        return false;
    }
}

if (!function_exists('str_ends_with')) {
    /**
     * Determine if a given string ends with a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    function str_ends_with($haystack, $needles)
    {
        foreach ((array) $needles as $needle) {
            if (substr($haystack, -strlen($needle)) === (string) $needle) {
                return true;
            }
        }

        return false;
    }
}

if (!function_exists('define_once')) {
    /**
     * Define a const if not exists.
     *
     * @param string $name
     * @param mixed $value
     * @return bool
     */
    function define_once($name, $value = true)
    {
        return defined($name) or define($name, $value);
    }
}