如何修改此类以在 MySQL 服务器消失时捕获异常并重新连接?
<?php
class DBConn
{
private $conn;
public function __construct( $persistent = false )
{
try
{
$this->conn = new PDO( "mysql:host=localhost;dbname=test", 'test', "hoollaahaoo" );
$this->conn->exec( "SET CHARACTER SET utf8" );
$this->conn->setAttribute( PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC );
if ( $persistent )
$this->conn->setAttribute( PDO::ATTR_PERSISTENT, true );
}
catch( PDOException $e )
{
return $e->getMessage();
}
}
public function getConn()
{
return $this->conn;
}
}
最佳答案
你可能需要像这样创建你自己的类
- 从
__construct
中移除try/except
- 然后像这样连接到你的数据库:
$conn = null; $limit = 10; $counter = 0; while (true) { try { $conn = DBConn(); break; } catch (Exception $e) { $conn = null; $counter++; if ($counter == $limit) throw $e; } }
EDIT 1:
but if you say that your server goes away.... then may be smth like this
protected function _connect( $persistent = false ) {
$conn = null;
$limit = 10;
$counter = 0;
while (true) {
try {
$this->conn = new PDO( "mysql:host=localhost;dbname=test", 'test', "hoollaahaoo" );
$this->conn->exec( "SET CHARACTER SET utf8" );
$this->conn->setAttribute( PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC );
if ( $persistent )
$this->conn->setAttribute( PDO::ATTR_PERSISTENT, true );
}
catch (Exception $e) {
$conn = null;
$counter++;
if ($counter == $limit)
throw $e;
}
}
public function __construct( $persistent = false )
{
$this->_connect($persistent);
}
关于php - 重新连接 MySQL 服务器已经消失,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6860709/