mysql_db_query

(PHP 4, PHP 5)

mysql_db_query — Selects a database and executes a query on it

Warning

This function was deprecated in PHP 5.3.0, and it and the entire original MySQL extension was removed in PHP 7.0.0. Instead, use either the actively developed MySQLi or PDO_MySQL extensions. See also the MySQL: choosing an API guide. Alternatives to this function include:

mysqli_select_db() then the query
PDO::__construct()

Description

mysql_db_query(string $database, string $query, resource $link_identifier = NULL): resource|bool

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

Parameters

database: The name of the database that will be selected.
query: The MySQL query. Data inside the query should be properly escaped.
link_identifier: The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() had been called with no arguments. If no connection is found or established, an E_WARNING level error is generated.

Return Values

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.

Examples

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);

?>

Notes