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

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

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