Re: Introducing pragmas into PHP?

On 08/12/13 17:14, Alexey Zakhlestin wrote:

I am suggestion the overload of constants of the form PHP_PRAGMA_XXX to define PHP / Zend compiler / executor behaviours. This approach would be BC to 5.3 unless, of course, the application already used PHP_PRAGMA_* constants, in which case we might also need an allow_php_pragmas INI parameter to globally enable/disable their interpretation.

we already have declare() for this purpose exactly. http://docs.php.net/declare it might make sense to use it for more things Alexey, perhaps you missed the subtlety of my example:

namespace fred; const PHP_PRAGMA_ALLOW_OVERRIDE_BUILTINS=false; echo strlen("DDDD"); define() is a runtime function implemented by Zend/zend_builtin_functions.c:ZEND_FUNCTION(define). The constant which is defines is not available until the DO_FCALL_BY_NAME opcode is itself executed sometime *after* the compile of the current source completes. const is a syntactic construct that can be intercepted in zend_compile.c, etc., and therefore can condition the remainder of the compile of that source. That's what pragmas do. However, you are quite correct that: define('fred\PHP_PRAGMA_ALLOW_OVERRIDE_BUILTINS', false); include "some_other_php_file_in_namespace_fred.php"; ... would set the pragma for subsequent source scripts in the "fred" namespace, if we adopted this convention. Hope this helps. Terry