What's the point of E_ALL | E_STRICT if it's the same value as E_ALL?

Question

E_ALL equals 8191 (0001 1111 1111 1111)
E_STRICT equals 2048 (0000 1000 0000 0000)

Using bitwise OR to combine them:

1 1111 1111 1111
  1000 0000 0000

We get the exact same value as the original E_ALL:

1 1111 1111 1111

What's the point of doing error_reporting(E_ALL | E_STRICT) if we can simply do error_reporting(E_ALL) to get the same thing?

I've noticed that with 5.4 that I can do the following 1. Set E_ALL in php.ini and then E_ALL | E_STRICT 2. Check phpinfo() and the value for error reporting is the same. This seems like a bug to me.... — Alex Waters, Oct 25 '12 at 07:55
use https://maximivanov.github.io/php-error-reporting-calculator/ to create error reporting of your choice — pkachhia, May 24 '17 at 06:44

score 19 · Accepted Answer · edited Apr 14 '13 at 08:29

19

You want:

error_reporting(E_ALL | E_STRICT);

E_ALL does not include E_STRICT (unless you are using PHP 5.4+). Your values are incorrect. From Predefined Constants E_ALL is defined as:

All errors and warnings, as supported, except of level E_STRICT prior to PHP 5.4.

32767 in PHP 5.4.x, 30719 in PHP 5.3.x, 6143 in PHP 5.2.x, 2047 previously

edited Apr 14 '13 at 08:29

alxgb

543
8
18

answered Oct 28 '09 at 16:05

cletus

616,129
168
910
942

I see this means the constant values will change as the version changes. The values I found is from http://www.w3schools.com/PHP/func_error_reporting.asp They are very outdated, right? – bobo Oct 28 '09 at 16:20
12

w3schools can have some very outdated information. I would ALWAYS go to php.net as a first reference for anything PHP related. – cletus Oct 28 '09 at 16:27
3

In PHP 5.4, `E_STRICT` is included in `E_ALL`. – apaderno Nov 30 '12 at 02:38

Azeem.Butt · Answer 2 · 2009-10-28T16:18:59.603

3

1 | 1 = 1

The simplest answer possible is that there's presently no reason to combine the two with a bitwise or operation, but if they ever decide to change those constants in the future, then there might be.

Edit: and you seem to have pulled the wrong values for those constants, making the entire question moot.

edited Oct 28 '09 at 16:18

answered Oct 28 '09 at 16:10

Azeem.Butt

5,855
1
26
22

score 1 · Answer 3 · answered Aug 14 '13 at 22:59

1

from php.net:

Passing in the value -1 will show every possible error, even when new levels and constants are added in future PHP versions. The E_ALL constant also behaves this way as of PHP 5.4.

answered Aug 14 '13 at 22:59

Lan

1,874
2
20
37

Michael Käfer · Answer 4 · 2018-12-08T18:48:26.517

The bit values provided in the question are not generally wrong but only for PHP versions older than 5.4.

PHP 5.4+

E_ALL includes E_STRICT so you should use: error_reporting(E_ALL);

Binary                  Name       Decimal
0001 1111 1111 1111     E_ALL      32767
0000 1000 0000 0000     E_STRICT   2048
----------------------------------------------------------------------
0001 1111 1111 1111     E_ALL | E_STRICT produces the same result as E_ALL

PHP 5.3

E_ALL does not include E_STRICT so you should use: error_reporting(E_ALL | E_STRICT);

Binary                  Name       Decimal
0111 0111 1111 1111     E_ALL      30719
0000 1000 0000 0000     E_STRICT   2048
----------------------------------------------------------------------
0111 1111 1111 1111     E_ALL | E_STRICT produces a different value than E_ALL

PHP 5.0 till 5.2

E_ALL does not include E_STRICT so you should use: error_reporting(E_ALL | E_STRICT); but the bit values differ from the values in PHP 5.3.

PHP before 5.0

E_STRICT does not exist so you must use: error_reporting(E_ALL);

What's the point of E_ALL | E_STRICT if it's the same value as E_ALL?

4 Answers4

PHP 5.4+

PHP 5.3

PHP 5.0 till 5.2

PHP before 5.0

Linked