cubrid_lob2_read

(PECL CUBRID >= 8.4.1)

cubrid_lob2_read — Read from BLOB/CLOB data

说明

cubrid_lob2_read(resource $lob_identifier, int $len): string

The cubrid_lob2_read() function reads len bytes from the LOB data and returns the bytes read.

参数

lob_identifier: Lob identifier as a result of cubrid_lob2_new() or get from the result set.
len: Length from buffer you want to read from the lob data.

返回值

Returns the contents as a string, false when there is no more data, or null on failure.

范例

示例 #1 cubrid_lob2_read() example 1


<?php
// test_lob (id INT, contents CLOB)

$conn = cubrid_connect("localhost", 33000, "demodb", "public", "");

$req = cubrid_execute($conn, "select * from test_lob");

$row = cubrid_fetch_row($req, CUBRID_LOB);

print "position now is " . cubrid_lob2_tell($row[1]) . "\n";

cubrid_lob2_seek($row[1], 10, CUBRID_CURSOR_FIRST);

print "\nposition after moving farword is " . cubrid_lob2_tell($row[1]) . "\n";

$data = cubrid_lob2_read($row[1], 12);

print "\nposition after reading is " . cubrid_lob2_tell($row[1]) . "\n";

print $data . "\n";

cubrid_lob2_seek($row[1], 5, CUBRID_CURSOR_CURRENT);

print "\nposition after moving again is " . cubrid_lob2_tell($row[1]) . "\n";

$data = cubrid_lob2_read($row[1], 20);
print $data . "\n";

cubrid_disconnect($conn);
?>

示例 #2 cubrid_lob2_read() example 2


<?php
// test_lob (id INT, contents CLOB)

$conn = cubrid_connect("localhost", 33000, "demodb", "dba", "");

$req = cubrid_execute($conn, "select * from test_lob");

$row = cubrid_fetch_row($req, CUBRID_LOB);

while (true) {
    if ($data = cubrid_lob2_read($row[1], 1024)) {
        print $data . "\n";
    }
    elseif ($data === false) {
        print "There is no more data\n";
        break;
    }
    else {
        print "There must some errors\n";
        break;
    }
}

cubrid_disconnect($conn);
?>

参见

cubrid_lob2_write() - Write to a lob object
cubrid_lob2_seek() - Move the cursor of a lob object
cubrid_lob2_seek64() - Move the cursor of a lob object
cubrid_lob2_tell() - Tell the cursor position of the LOB object
cubrid_lob2_tell64() - Tell the cursor position of the LOB object
cubrid_lob2_size() - Get a lob object's size
cubrid_lob2_size64() - Get a lob object's size

add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址：https://www.php.net/manual/en/function.cubrid-lob2-read.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获取指定函数定义在哪个文件中及行号 PHP mkdir()写出来的权限与mode值不符合 adodb连接mysql多个数据库的问题 PHP-FPM进程数的设定利用PHP SOAP实现WEB SERVICE

略微加速

PHP官方手册 - 互联网笔记

cubrid_lob2_read

说明

参数

返回值

范例

参见

User Contributed Notes