$_POST passed niet door

<?php
		$select = mysql_query("SELECT * FROM members WHERE username = '".addslashes($_POST['username'])."'");
		$obj = mysql_fetch_object($select);
		$count = mysql_num_rows($select);
?>

<?php
		$select = mysql_query("SELECT * FROM members WHERE username = '".addslashes($_POST['username'])."'");
		$obj = mysql_fetch_object($select);
		$count = mysql_num_rows($select);
?>

$query = "SELECT * FROM members WHERE username = '".addslashes($_POST['username'])."'";
$select = mysql_query($query) or die(mysql_error() . "<br />query:" . $query);

$query = "SELECT * FROM members WHERE username = '".addslashes($_POST['username'])."'";
$select = mysql_query($query) or die(mysql_error() . "<br />query:" . $query);