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PHP Numbers

Check if the variable is numeric

bool(true)
bool(true)
bool(true)
bool(false)

<?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));
?>

Note: From PHP 7.0: The is_numeric() function will return FALSE for numeric strings in hexadecimal form (e.g. 0xf4c3b00c), as they are no longer considered as numeric strings.