mssql_pconnect Open persistent MS SQL connection php函数


(PHP 4, PHP 5, PECL odbtp >= 1.1.1)

mssql_pconnectOpen persistent MS SQL connection


resource mssql_pconnect ([ string $servername [, string $username [, string $password [, bool $new_link = false ]]]] )

mssql_pconnect() acts very much like mssql_connect() with two major differences.

First, when connecting, the function would first try to find a (persistent) link that's already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection.

Second, the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for future use (mssql_close() will not close links established by mssql_pconnect()).

This type of links is therefore called 'persistent'.



The MS SQL server. It can also include a port number. e.g. hostname:port.


The username.


The password.


If a second call is made to mssql_pconnect() with the same arguments, no new link will be established, but instead, the link identifier of the already opened link will be returned. This parameter modifies this behavior and makes mssql_pconnect() always open a new link, even if mssql_pconnect() was called before with the same parameters.


Returns a positive MS SQL persistent link identifier on success, or FALSE on error.


Example #1 mssql_pconnect() using the new_link parameter

// Connect to MSSQL and select the database
$link1 mssql_pconnect('MANGOSQLEXPRESS''sa''phpfi');

// Create a new link
$link2 mssql_pconnect('MANGOSQLEXPRESS''sa''phpfi'true);

mssql_query Send MS SQL query
mssql_result Get result data
mssql_rows_affected Returns the number of records affected by the query
mssql_select_db Select MS SQL database
mt_getrandmax 显示随机数的最大可能值
mt_rand 生成更好的随机数
mt_srand 播下一个更好的随机数发生器种子
mysqli_bind_param mysqli_stmt_bind_param的别名
mysqli_bind_result mysqli_stmt_bind_result的别名
mysqli_client_encoding mysqli_character_set_name的别名
mysqli_connect 别名 mysqli::__construct
mysqli_disable_reads_from_master 禁用从主机读取
mysqli_disable_rpl_parse 禁用RPL解析
mysqli_enable_reads_from_master 开启从主机读取

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