Compter les lignes table sql/php

SELECT Count(*)
FROM Nom_de_la_table;

<?php
$req = $bdd->query('SELECT COUNT(*) AS nbrLignes FROM matable');
$data = $req->fetch();
echo $data['nbrLignes'];
?>

<?php
try
{
	
	CONNECTION A BASE DE DONNEE 
}
catch(Exception $e)
{
	
        die('Erreur : '.$e->getMessage());
}


$reponse = $bdd->query('SELECT Count(*) FROM signal');

while ($donnees = $reponse->fetch())
{
?>

<?php
}

$reponse->closeCursor();

?>

<? echo $donnees ?>