php validate integer [updated]
- by George Garchagudashvili
Read B
A:
I'll give quick example:
$a = "\n \t 34 3"; // string(9)
$aint = intval($a); // int(34)
var_dump($a == $aint);
result:
bool(true)
call me noob but can you tell me why/how does these variables do pass equalization test?
What I want to achieve is to check if '1989' equals 1989 would be true, but not any other case. ex: '1989 ' should not pass the test. Also I don't want to use regex.
B:
I need to validate if variable is integer, I've tried all the available built-in functions or helpful tips, but the only best solution would be regex which I don't want to use this time.
also filter_var is not best because it also filters data, but I want to only validate it.
123
-123
'123'
'-123'
these inputs to be only true, false otherwise
I've tried many different options:
ctype_digit("-123"); // false - doesn't work
is_int('123'); // false
filter_var(' 123 ', FILTER_VALIDATE_INT) !== false; // true - doesn't work
