sqlite_fetch_single

SQLiteResult->fetchSingle

SQLiteUnbuffered->fetchSingle

(No version information available, might be only in CVS)

SQLiteUnbuffered->fetchSingle — Fetches the first column of a result set as a string

Popis

string sqlite_fetch_single ( resource $result [, bool $decode_binary ] )

Object oriented style (method):

SQLiteResult

string fetchSingle ([ bool $decode_binary ] )

SQLiteUnbuffered

string fetchSingle ([ bool $decode_binary ] )

sqlite_fetch_single() is identical to sqlite_fetch_array() except that it returns the value of the first column of the rowset.

This is the most optimal way to retrieve data when you are only interested in the values from a single column of data.

Parametre

result: The SQLite result resource. This parameter is not required when using the object-oriented method.
decode_binary: Keď sa decode_binary parameter nastaví na TRUE (default), PHP dekóduje kódovanie binárneho súboru, ktorý aplikoval na dáta, ak bol zakódovaný pomocou sqlite_escape_string(). Túto hodnotu by ste mali ponechať vo svojom východzom stave, pokiaľ nespolupracujete s databázami vytvorenými inými sqlite schopnými aplikáciami.

Príklady

Example#1 A sqlite_fetch_single() example


<?php
if ($dbhandle = sqlite_open('mysqlitedb', 0666, $sqliteerror)) {

    $sql = "SELECT id FROM sometable WHERE id = 42";
    $res = sqlite_query($dbhandle, $sql);

    if (sqlite_num_rows($res) > 0) {
        echo sqlite_fetch_single($res); // 42
    }
    
    sqlite_close($dbhandle);
}
?>

Tiež pozri

sqlite_fetch_array()