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<!DOCTYPE html><html><body>​<?php// Check if the variable is numeric   $x = 5985;var_dump(is_numeric($x));​echo "<br>";​$x = "5985";var_dump(is_numeric($x));​echo "<br>";​$x = "59.85" + 100;var_dump(is_numeric($x));​echo "<br>";​$x = "Hello";var_dump(is_numeric($x));?>  ​</body></html>​