dBase

简介
安装／配置
预定义常量
dBase 函数
- dbase_add_record — Adds a record to a database
- dbase_close — Closes a database
- dbase_create — Creates a database
- dbase_delete_record — Deletes a record from a database
- dbase_get_header_info — Gets the header info of a database
- dbase_get_record_with_names — Gets a record from a database as an associative array
- dbase_get_record — Gets a record from a database as an indexed array
- dbase_numfields — Gets the number of fields of a database
- dbase_numrecords — Gets the number of records in a database
- dbase_open — Opens a database
- dbase_pack — Packs a database
- dbase_replace_record — Replaces a record in a database

add a note

User Contributed Notes 1 note

down

Anonymous ¶

12 years ago


Unfortunately the dbase functions are not compiled into my commercial server's php and I needed to read some geo data in shape files, which include data in dbfs.


So maybe this will help some others:


<?php

function echo_dbf($dbfname) {

    $fdbf = fopen($dbfname,'r'); 

    $fields = array();

    $buf = fread($fdbf,32);

    $header=unpack( "VRecordCount/vFirstRecord/vRecordLength", substr($buf,4,8));

    echo 'Header: '.json_encode($header).'<br/>';

    $goon = true; 

    $unpackString='';

    while ($goon && !feof($fdbf)) { // read fields:

        $buf = fread($fdbf,32);

        if (substr($buf,0,1)==chr(13)) {$goon=false;} // end of field list

        else {

            $field=unpack( "a11fieldname/A1fieldtype/Voffset/Cfieldlen/Cfielddec", substr($buf,0,18));

            echo 'Field: '.json_encode($field).'<br/>';

            $unpackString.="A$field[fieldlen]$field[fieldname]/";

            array_push($fields, $field);}}

    fseek($fdbf, $header['FirstRecord']+1); // move back to the start of the first record (after the field definitions)

    for ($i=1; $i<=$header['RecordCount']; $i++) {

        $buf = fread($fdbf,$header['RecordLength']);

        $record=unpack($unpackString,$buf);

        echo 'record: '.json_encode($record).'<br/>';

        echo $i.$buf.'<br/>';} //raw record

    fclose($fdbf); }

?>



This function simply dumps an entire file using echo and json_encode, so you can tweak it to your own needs... (eg random access would just be a matter of changing the seek to : fseek($fdbf, $header['FirstRecord']+1 +($header['RecordLength']* $desiredrecord0based); removing the for loop and returning $record


This function doesn't do any type conversion, but it does extract the type if you need to play with dates, or tidy up the numbers etc.


So quick and dirty but maybe of use to somebody and illustrates the power of unpack.


Erich

add a note

官方地址：https://www.php.net/manual/en/book.dbase.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扩展开发 [原创]诡异的php-fpm超时问题

略微加速

PHP官方手册 - 互联网笔记

dBase

User Contributed Notes 1 note