Call count result from stored procedure MySQL in PHP

I'm trying to get a value from a stored procedure in php but I can't do it.

My stored procedure:

DROP PROCEDURE IF EXISTS sp_table;
DELIMITER $$
CREATE PROCEDURE sp_table()
BEGIN
SELECT COUNT(*) FROM table;
END$$
DELIMITER ;
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My PHP code:

$recordSet_table = $conn->query("CALL sp_table()");

print_r($recordSet_table)."<br><br>";
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