Problème de code en PHP

<?php

$db = mysql_connect("localhost","root","");
mysql_select_db('planet_prono',$db);

	$sql = "SELECT contenu FROM infos_tbl WHERE id=1";
	$i_1 = mysql_query($sql);
	$donnees = mysql_fetch_array($i_1);
	echo $donnees [contenu];
?>
<input type="checkbox" name="choix1"> <input type="checkbox" name="choix2"> <input type="checkbox" name="choix3">
<?
	$sql = "SELECT contenu FROM infos_tbl WHERE id=2";
	$i_1 = mysql_query($sql);
	$donnees = mysql_fetch_array($i_1);
	echo $donnees [contenu];
echo "<br>";

$sql = "SELECT contenu FROM infos_tbl WHERE id=3";
	$i_1 = mysql_query($sql);
	$donnees = mysql_fetch_array($i_1);
	echo $donnees [contenu];
echo "&nbsp;&nbsp;&nbsp;&nbsp;";
	$sql = "SELECT contenu FROM infos_tbl WHERE id=4";
	$i_1 = mysql_query($sql);
	$donnees = mysql_fetch_array($i_1);
	echo $donnees [contenu];
echo "<br>";