variable-types

I was trying to get my Netbeans to autocomplete with PHP , and I learned that this code is valid in PHP: function blah(Bur $bur) {} A couple of questions: Does this actually impose any limits on what type of variable I can pass to the blah method? If this is just to help the IDE, that's fine with me. How can I declare the type of a variable in PHP if I'm not in a function? JW. This type-hinting only works for validating function arguments; you can't declare that a PHP variable must always be of a certain type. This means that in your example, $bur must be of type Bur when "blah" is called, but

How can I check if a var is a string in JavaScript? I've tried this and it doesn't work... var a_string = "Hello, I'm a string."; if (a_string typeof 'string') { // this is a string } You were close: if (typeof a_string === 'string') { // this is a string } On a related note: the above check won't work if a string is created with new String('hello') as the type will be Object instead. There are complicated solutions to work around this, but it's better to just avoid creating strings that way, ever. alex The typeof operator isn't an infix (so the LHS of your example doesn't make sense). You

Is there some "nice" way to check if a variable passed to a macro is a pointer? e.g. #define IS_PTR(x) something int a; #if IS_PTR(a) printf("a pointer we have\n"); #else printf("not a pointer we have\n"); #endif The idea is that this is not done run-time but compile-time, as in: we get different code depending on if the variable is a pointer or not. So I would like IS_PTR() to evaluate to some kind of constant expression in some way. Am I going about this idea all the wrong way? It is certainly not observable through the preprocessor in #if as you imply in your question. The preprocessor

I'm currently migrating my website from PHP5 to PHP7, and I've started using the strict typing feature that was added. However this requires me to begin all files with the following line: <?php declare(strict_types=1); // All other code here // ... So I was wondering, is there any way to enable strict_types globally using something like php.ini or the apache configuration file so I don't have to write this line every time, and if so how could I enable this? This is deliberately not possible, because the implementation adopted after an extremely long discussion of scalar type hints was this one