probleme pour ma map, que mettre dans l'organisation de ma requette ?

[leni]

Code PHP :

<?php 

$req2 = mysql_query("SELECT posx, posy FROM obstacles WHERE posx between '.$x_start.' and '.$x_end.' AND posy between '.$y_start.' and '.$y_end.'") or die(mysql_error());

$oasis=mysql_fetch_array($req2);