array Set::numeric ($array=null)

Checks to see if all the values in the array are numeric

	$data = array('one');
	$res = Set::numeric(array_keys($data));
	
	// $res is true
	
	$data = array(1 => 'one');
	$res = Set::numeric($data);

	// $res is false
	
	$data = array('one');
	$res = Set::numeric($data);
	
	// $res is false
	
	$data = array('one' => 'two');
	$res = Set::numeric($data);
	
	// $res is false
	
	$data = array('one' => 1);
	$res = Set::numeric($data);
	
	// $res is true
	
	$data = array(0);
	$res = Set::numeric($data);
	
	// $res is true
	
	$data = array('one', 'two', 'three', 'four', 'five');
	$res = Set::numeric(array_keys($data));
	
	// $res is true
	
	$data = array(1 => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
	$res = Set::numeric(array_keys($data));
	
	// $res is true
	
	$data = array('1' => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
	$res = Set::numeric(array_keys($data));
	
	// $res is true
	
	$data = array('one', 2 => 'two', 3 => 'three', 4 => 'four', 'a' => 'five');
	$res = Set::numeric(array_keys($data));
	
	// $res is false

1. $data = array('one');
2. $res = Set::numeric(array_keys($data));
4. // $res is true
6. $data = array(1 => 'one');
7. $res = Set::numeric($data);
8. // $res is false
10. $data = array('one');
11. $res = Set::numeric($data);
13. // $res is false
15. $data = array('one' => 'two');
16. $res = Set::numeric($data);
18. // $res is false
20. $data = array('one' => 1);
21. $res = Set::numeric($data);
23. // $res is true
25. $data = array(0);
26. $res = Set::numeric($data);
28. // $res is true
30. $data = array('one', 'two', 'three', 'four', 'five');
31. $res = Set::numeric(array_keys($data));
33. // $res is true
35. $data = array(1 => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
36. $res = Set::numeric(array_keys($data));
38. // $res is true
40. $data = array('1' => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
41. $res = Set::numeric(array_keys($data));
43. // $res is true
45. $data = array('one', 2 => 'two', 3 => 'three', 4 => 'four', 'a' => 'five');
46. $res = Set::numeric(array_keys($data));
48. // $res is false