contact form 7 - cannot run php - php

Question

I have installed WordPress and the plugin contact form 7 in it.
To make it a multi-page contact form I have installed Contact Form 7 Multi-Step Forms as well.
Everything works fine until yet. Even the mail gets sent.
The problem I am having is, that I want to run some PHP-code before the emails get sent.
I have inserted this code to try the ability of the plugin to run it.
function testfunc( $cf7 )
{
mysql_connect("localhost", "user_name", "password") or die(mysql_error());
mysql_select_db("db_name") or die(mysql_error());
mysql_query("CREATE TABLE `aaaaaaaaaaa` ( test VARCHAR(30))");
}
add_action( 'wpcf7_before_send_mail', 'testfunc', 1);
The function even works fine when I run it outside of the plugin in an extra php-file.
Now I cannot figure out why the function does not work when inserted in the plugin?

Answer 1

Query database in wordpress using it's global wpdb object like this way
Refer this
function testfunc( $cf7 )
{
global $wpdb;
$wpdb->query("CREATE TABLE `aaaaaaaaaaa` ( test VARCHAR(30))");
}
add_action( 'wpcf7_before_send_mail', 'testfunc', 1);

Answer 2

wordpress create tabel using this way not in php structure for connect:
More info hear for create, get table data for wp
function testfunc( $cf7 )
{
global $wpdb;
$table_name = $wpdb->prefix . 'tablename';
$sql = "CREATE TABLE IF NOT EXISTS ".$table_name."(
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(255) DEFAULT NULL,
UNIQUE KEY id (id)
);";
require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
dbDelta( $sql );
}

Answer 3

+1 for Rave Patel
I only suggest that you check if the table exists before trying to create it everytime.
function testfunc( $cf7 )
{
global $wpdb;
$table_name = $wpdb->prefix . 'tablename';
if($wpdb->get_var("SHOW TABLES LIKE '$table_name'") != $table_name) {
$sql = "CREATE TABLE $table_name (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(255) DEFAULT NULL,
UNIQUE KEY id (id)
)";
require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
dbDelta( $sql );
}
}