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//don't forget to set a higher memory limit to avoid errors like
//Allowed Memory Size of xxxxxxx Bytes Exhausted
ini_set('memory_limit', '4096M');
$query = "SELECT * FROM my_table";
$statement = $connect->prepare($query);
$statement->execute();
$number_of_rows = $statement->fetchColumn();
echo $number_of_rows;
----
Server IP: 45.112.84.4
Probable Submitter: 80.90.5.137 (proxied: 178.38.99.227)
----
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