php教程

dba_firstkey

(PHP 4, PHP 5, PHP 7)

dba_firstkeyFetch first key

说明

dba_firstkey ( resource $handle ) : string

dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.

参数

handle

The database handler, returned by dba_open() or dba_popen().

返回值

Returns the key on success 或者在失败时返回 FALSE.

参见

User Contributed Notes

rcracer91 at gmail dot com 26-Aug-2009 12:21
I wondered why it wasn't already written, so I did because I think working with associative arrays is always as comfortable as can be

<?php
function dba_fetch_assoc($handle) {
   
$assoc = array();
    for(
$k = dba_firstkey($handle); $k != false; $k = dba_nextkey($handle)) {
       
$assoc[$k] = dba_fetch($k, $handle);
    }
    return
$assoc;
}
?>
psycho-logic at excite dot com 22-Oct-2003 05:38
Looks like Jacky is using some DB object? I don't know if it's native to PHP or written on it's own... Anyways this is what I use:

$DBCon = dba_open("/tmp/test_db.db2", "r", "db2") or die("Uh oh, can't open the database :(");
if ($the_key = dba_firstkey($DBCon)) do {
    print("Key: $the_key    Value:");
    print dba_fetch($the_key, $DBCon);
    print("<BR>");
} while ($the_key = dba_nextkey($DBCon));
print ("<BR><BR><BR>Well looks like we're done here :-)");
jacky dot jackyhung dot net 17-Jan-2002 05:17
for ($key = dba_firstkey($this->handle); $key !== false; $key = dba_nextkey($this->handle)) {
            $keyset[] = $key;
        } // end for

CopyRight © 2008-2022 verySource.Com All Rights reserved. 京ICP备17048824号-1 京公网安备:11010502034788