(PHP 5, PHP 7)
mysqli::ping -- mysqli_ping — ping 一锟斤拷锟斤拷锟接ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷诙峡锟阶刺拷锟斤拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷锟教伙拷锟斤拷锟�
锟斤拷榈斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷欠锟斤拷锟斤拷锟斤拷锟� 锟斤拷锟斤拷锟斤拷 mysqli.reconnect 选锟斤拷锟角帮拷锟斤拷拢锟� 锟斤拷锟斤拷锟斤拷锟斤拷丫锟斤拷峡锟斤拷锟� ping 锟斤拷锟斤拷锟结尝锟斤拷锟斤拷锟铰斤拷锟斤拷锟斤拷锟接★拷
Note: mysqlnd 锟斤拷锟斤拷锟斤拷锟斤拷锟� php.ini 锟叫碉拷 mysqli.reconnect 选锟筋， 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟斤拷
锟酵伙拷锟剿斤拷锟斤拷锟斤拷锟斤拷之锟襟，筹拷时锟戒处锟斤拷锟斤拷锟斤拷状态锟斤拷 锟斤拷锟斤拷锟矫此猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角凤拷乇锟斤拷锟斤拷锟斤拷锟斤拷锟接ｏ拷 锟斤拷锟叫憋拷要锟斤拷锟斤拷锟斤拷锟皆讹拷锟斤拷锟铰斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接★拷
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷
Example #1 mysqli::ping() 锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟�
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* 锟斤拷锟斤拷锟斤拷锟� */
if ($mysqli->connect_errno) {
printf("Connect failed: %s\n", $mysqli->connect_error);
exit();
}
/* 锟斤拷锟斤拷锟斤拷锟斤拷欠窕够锟皆� */
if ($mysqli->ping()) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", $mysqli->error);
}
/* 锟截憋拷锟斤拷锟斤拷 */
$mysqli->close();
?>
锟斤拷锟教伙拷锟斤拷锟�
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* 锟斤拷锟斤拷锟斤拷锟� */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* 锟斤拷锟斤拷锟斤拷锟斤拷欠窕够锟皆� */
if (mysqli_ping($link)) {
printf ("Our connection is ok!\n");
} else {
printf ("Error: %s\n", mysqli_error($link));
}
/* 锟截憋拷锟斤拷锟斤拷 */
mysqli_close($link);
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
Our connection is ok!