Error: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

<?php
	$con = mysql_connect('localhost', 'root', '1234') or die('Error: '.mysql_error());
	mysql_select_db('test', $con)  or die('Error: '.mysql_error());
	
	$result = mysql_query('SELECT * FROM tests');
	
	while($rs = mysql_fetch_assoc($result))
	{
		echo $rs['id'].' <ab> '.$rs['user'].'<br />';	
	}
	echo "Hello I'm Ohm";
?>