pg_lo_write

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_lo_write — 向大型对象写入数据

说明

pg_lo_write(resource $large_object, string $data): int

pg_lo_write() 把 data 参数中的数据尽可能多地写入大型对象并返回实际写入的字节数。如果出错则返回 false。large_object 参数是 pg_lo_open() 函数所返回的大型对象资源号。

要使用大型对象（lo）接口，需要将其放置在事务块中。

注意:
本函数以前的名字为 pg_lo_write()。

参见 pg_lo_create() 和 pg_lo_open()。

add a note

User Contributed Notes 2 notes

down

cedric at isoca.com ¶

21 years ago


Be aware when you modify a lo with pg_lowrite() to remove first the old one : if the new lo is smaller than the one before, it only overwrite the begining and you keep the end of the old lo (open with "w" parameter, PHP 4.04 Linux RH).

down

-1

nandrews at logictree dot co dot uk ¶

19 years ago


Using php 4.3.0 and PostgreSQL 7.3.1

I can write a simple script in which pg_lo_write seems to always return 1 and not the number of bytes written, as evidenced by extracting the data through another means.

Further more, I can make this pg_lo_write fail, or at least fail to write all the data it's pretty difficult to tell without the number of bytes written being returned, and not return the false value. In addition to this, the lo resource has been adjusted so that the oid it contains is 0.

Unfortunately, I do not know what exactly the failure mode is, it does seem to be in the ip network communication side of PostgreSQL, which is odd since the unix domain comms works fine for this. However, it would have been useful to have the pg_lo_write() function return as advertised, it would have saved some of the 2 man hours me and the dev. team put into diagnosing this problem.

add a note

官方地址：https://www.php.net/manual/en/function.pg-lo-write.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 php中几种注释规范利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号

略微加速

PHP官方手册 - 互联网笔记

pg_lo_write

说明

User Contributed Notes 2 notes