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

객체 기반 형식

bool mysqli::ping ( void )

절차식 형식

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

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

Example #1 mysqli::ping() example

객체 기반 형식


<?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();
?>

절차식 형식


<?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 예제들의 출력:

Our connection is ok!