mysql_db_query

(PHP 4, PHP 5, PECL mysql:1.0)

mysql_db_query — Send a MySQL query

Popis

resource mysql_db_query ( string $database , string $query [, resource $link_identifier ] )

mysql_db_query() selects a database, and executes a query on it.

Parametre

database: The name of the database that will be selected.
query: The MySQL query.
link_identifier: Pripojenie k MySQL. Ak link identifier nie je zadaný, predpokladá sa posledné spojenie otvorené s mysql_connect(). Ak také spojenie nie je nájdené, pokúsi sa jedno vytvoriť ako keby bolo volané mysql_connect() bez argumentov. Ak sa náhodou nájde pripojenie, alebo je vytvorené, je vygenerované varovanie úrovne E_WARNING.

Vrátené hodnoty

Returns a positive MySQL result resource to the query result, or FALSE on error. The function also returns TRUE/FALSE for INSERT/UPDATE/DELETE queries to indicate success/failure.

ChangeLog

Verzia	Popis
4.0.6	This function is deprecated, do not use this function. Use mysql_select_db() and mysql_query() instead.

Príklady

Example#1 mysql_db_query() alternative example


<?php

if (!$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password')) {
    echo 'Could not connect to mysql';
    exit;
}

if (!mysql_select_db('mysql_dbname', $link)) {
    echo 'Could not select database';
    exit;
}

$sql    = 'SELECT foo FROM bar WHERE id = 42';
$result = mysql_query($sql, $link);

if (!$result) {
    echo "DB Error, could not query the database\n";
    echo 'MySQL Error: ' . mysql_error();
    exit;
}

while ($row = mysql_fetch_assoc($result)) {
    echo $row['foo'];
}

mysql_free_result($result);

?>

Poznámky

Note: Be aware that this function does NOT switch back to the database you were connected before. In other words, you can't use this function to temporarily run a sql query on another database, you would have to manually switch back. Users are strongly encouraged to use the database.table syntax in their sql queries or mysql_select_db() instead of this function.

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