dba_fetch

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

dba_fetch — Fetch data specified by key

说明

dba_fetch ( string $key , resource $handle ) : string
dba_fetch ( string $key , int $skip , resource $handle ) : string

dba_fetch() fetches the data specified by key from the database specified with handle.

参数

key

The key the data is specified by.

Note:

When working with inifiles this function accepts arrays as keys where index 0 is the group and index 1 is the value name. See: dba_key_split().

skip

The number of key-value pairs to ignore when using cdb databases. This value is ignored for all other databases which do not support multiple keys with the same name.

handle

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

返回值

Returns the associated string if the key/data pair is found, false otherwise.

参见

User Contributed Notes

khan666 at lycos dot co dot kr 05-Dec-2010 05:11
:: fetch array sort.

ex) TEST_DATA.DB

    1/korea/5000/word 1
    10/japan/25000/word 10
    21/china/130000/word 21
    2/usa/35000/word 2

<?php
# LIST SORT
$DB4_DATABASE = "TEST_DATA.DB4";
$DIV = "/";
$_FILE = "$DATA_DIR/HUTM_NETWORK_ROUTER.DB"; // DB4 FileName

$db  = dba_open($DB4_DATABASE,"r","db4");
$key = dba_firstkey($db);
$ii = 0;
while($key != NULL)
{
     $LIST[$ii] = explode($DIV,dba_fetch($key, $db));    // fetch array
    $key = dba_nextkey($db);
    $ii++;
}
dba_close($db);
$total = $ii; // total count

# date sort
sort($LIST,SORT_NUMERIC);    // numeric key sort ..

# list display
for($i=0;$i<$total;$i++)
{
    $oData = explode($DIV,$LIST[$i]);    // key + value (sort)

    $key   = trim(chop($oData[0])); # ???
    $name  = trim(chop($oData[1])); # ??
    $count = trim(chop($oData[2])); # ?
    $word  = trim(chop($oData[3])); # ??

    echo "$key / $name / $count / $word <br>\r\n";
}
?>

::result::

1/korea/5000/word 1
2/usa/35000/word 2
10/japan/25000/word 10
21/china/130000/word 21