mysqli::options
mysqli::poll
MySQLi
PHP Manual

# mysqli::ping

# mysqli_ping

(PHP 5)

mysqli::ping -- mysqli_ping — Pings a server connection, or tries to reconnect if the connection has gone down

### 설명

Object oriented style (method):

bool mysqli::ping ( void )

Procedural style:

bool mysqli_ping ( mysqli `$link` )

Checks whether the connection to the server is working. If it has gone down, and global option mysqli.reconnect is enabled an automatic reconnection is attempted.

This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary.

### 인수

`link`

  순차 형식 전용: mysqli_connect()나 mysqli_init()가 반환한 연결 식별자.

### 반환값

성공할 경우 `TRUE`를, 실패할 경우 `FALSE`를 반환합니다.

### 예제

Example #1 Object oriented style

`<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* check if server is alive */
if ($mysqli->ping()) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", $mysqli->error);
}
/* close connection */
$mysqli->close();
?>`

Example #2 Procedural style

`<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* check if server is alive */
if (mysqli_ping($link)) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", mysqli_error($link));
}
/* close connection */
mysqli_close($link);
?>`

위 예제의 출력:

    Our connection is ok!

mysqli::options
mysqli::poll
MySQLi
PHP Manual