mysqli::options
mysqli::poll
mysqli
PHP Manual

# mysqli::ping

# mysqli_ping

Pings a server connection, or tries to reconnect if the connection has gone down

### Description

Object oriented style

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.

### Parameters

`link`

  Procedural style only: A link identifier returned by mysqli_connect or mysqli_init

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 mysqli::ping example

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();
?>`

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);
?>`

The above examples will output:

    Our connection is ok!