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dba_fetch

(PHP 4, PHP 5, PHP 7)

dba_fetchFetch data specified by key

说明

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

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.

更新日志

版本 说明
4.3.0 The skip parameter is available to support cdb's capability of multiple keys having the same name.

参见

  • dba_exists() - Check whether key exists
  • dba_delete() - Delete DBA entry specified by key
  • dba_insert() - Insert entry
  • dba_replace() - Replace or insert entry
  • dba_key_split() - Splits a key in string representation into array representation

用户评论:

[#1] khan666 at lycos dot co dot kr [2010-12-05 05:11:11]

:: 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

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