odbc_pconnect

(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_pconnect — Open a persistent database connection

说明

odbc_pconnect(
    string $dsn,
    string $user,
    string $password,
    int $cursor_option = SQL_CUR_USE_DRIVER
): resource|false

Opens a persistent database connection.

This function is much like odbc_connect(), except that the connection is not really closed when the script has finished. Future requests for a connection with the same dsn, user, password combination (via odbc_connect() and odbc_pconnect()) can reuse the persistent connection.

参数

See odbc_connect() for details.

返回值

Returns an ODBC connection, 或者在失败时返回 false. error.

注释

注意: Persistent connections have no effect if PHP is used as a CGI program.

参见

odbc_connect() - Connect to a datasource
Persistent Database Connections

add a note

User Contributed Notes 4 notes

down

wls at wwco dot com ¶

21 years ago


I found that using  odbc_close($odbchandle)  on a connection opened by odbc_pconnect() causes a warning "not a valid ODBC-Link resource".  So you can't just change odbc_connect() to odbc_pconnect() and expect things to work without warning messages.  However, you can use odbc_close_all() and not get a warning.

down

etsai at email dot com ¶

21 years ago


The following constants are defined for cursortype:

 - SQL_CUR_USE_IF_NEEDED 

 - SQL_CUR_USE_ODBC 

 - SQL_CUR_USE_DRIVER 

 - SQL_CUR_DEFAULT 


With some ODBC drivers, executing a complex stored procedure may fail with an error similar to: "Cannot open a cursor on a stored procedure that has anything other than a single select statement in it". Using SQL_CUR_USE_ODBC may avoid that error. Also, some drivers don't support the optional row_number parameter in odbc_fetch_row(). SQL_CUR_USE_ODBC might help in that case, too.

down

j_schrab at execpc dot com ¶

21 years ago


Ok, learning time.  As I was told by the PHP-DevTeam...



Multiple connections are supported, but when you try to connect with exactly the same parameters, an existing

connection will be reused, leading to the behaviour you see.


You can simply omit the calls to odbc_close() since

connections get closed on script termination anyway or better:

Consider making your connection id a global variable or pass

it to your functions.

down

-3

alberici at to dot infn dot it ¶

19 years ago


I saw that closing an ODBC persistent connection opened with odbc_pconnect() with odbc_close() doesnt work. Someone here have proposed using odbc_close_all() but wouldnt that close all persistent connections (also others ones !!!) ? What about catching a persistent handle with odbc_connect() and then closing the connection with odbc_close() ? If there are no available handles (for some reason the last pconn has been closed) this approach opens and close a normal single-script connection. Waiting comments...

add a note

官方地址：https://www.php.net/manual/en/function.odbc-pconnect.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像常用的php ADODB使用方法集锦 PHP获取指定函数定义在哪个文件中及行号 PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗

略微加速

PHP官方手册 - 互联网笔记

odbc_pconnect

说明

参数

返回值

注释

参见

User Contributed Notes 4 notes