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# tcpwrap_check

(PECL)

tcpwrap_check -- Performs a tcpwrap check

## 说明

bool tcpwrap_check ( string daemon, string address [, string user [, bool nodns]] )

This function consults the `/etc/hosts.allow` and `/etc/hosts.deny` files to check if access to service daemon should be granted or denied for a client.

## 参数

daemon

  The service name.

address

  The client remote address. Can be either an IP address or a domain name.

user

  An optional user name.

nodns

  If address looks like domain name then DNS is used to resolve it to IP address; set nodns to `TRUE` to avoid this.

## 返回值

This function returns `TRUE` if access should be granted, `FALSE` otherwise.

## 范例

例子 1. Deny all connections from localhost

If your /etc/hosts.deny file contains:

    php: 127.0.0.1

And your code looks like:

`<?php if (!tcpwrap_check('php', $_SERVER['REMOTE_ADDR'])) { die('You are not welcome here'); } ?>`

## 参见

For more details please consult hosts_access(3) man page.

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