PHP $is_number isntead of is_numberic

is_number.php

<?php

declare( strict_types=1 );

$tests = array(
	"42",
	1337,
	0x539,
	02471,
	0b10100111001,
	1337e0,
	"0x539",
	"02471",
	"0b10100111001",
	"1337e0",
	"not numeric",
	array(),
	9.1,
	null,
	'',
);

foreach ($tests as $element) {
	if (is_numeric($element)) {
		echo var_export($element, true) . " is numeric", PHP_EOL;
	} else {
		echo var_export($element, true) . " is NOT numeric", PHP_EOL;
	}
}

$is_number = static function ($value):bool {
	return is_numeric( $value ) && (string) $value === (string) (float) $value;
};

var_dump('------');

foreach ($tests as $element) {
	if ($is_number($element)) {
		echo var_export($element, true) . " is numeric", PHP_EOL;
	} else {
		echo var_export($element, true) . " is NOT numeric", PHP_EOL;
	}
}