Defining Macros

jayant

How do I define macros in PHP. I need to write them for some code, hence [man]define/man will not work:-

Whenever I include a file I need to exec about 20 lines of code to decide whether to include a file or not, perform security checks etc.

// line 1
// line 2
// line 3
// ...
// ...
// ...
// line 18
if($file_should_be_included) {
    include_once("/path/to/file");
}

writing this code everytime I have to include a file is tedious.

I need macros that will replace SPECIAL_INCLUDE("/path/to/file");
will the above code.

I cannot use function for this because:-

function special_include($filename) {
// line 1
// line 2
// line 3
// ...
// ...
// ...
// line 18
if($file_should_be_included) {
    include_once("$filename");
}

}

In this scope of file included will get limited to this function only, and I wont be able to use the file outside this function.

I was able to think of a workaround in which the function will return the source of the file and we can "eval" it. but that makes code look ugly.

since i have to use something like

eval(source_of_file_to_be_included($filename));

I want it to be simply:
SPECIAL_INCLUDE("/path/to/file");

leatherback

Hi,

You could of course add a "return" value to your function:

You test in your script wether the file should be included. If that is the case, you set $Include_my_file to 1, otherwise 0.
At the end of the function:

return $Include_my_file;

You then call the script for each file:

$include_this = special_include($filename);

if ($include_this == '1')
{
include_once("$filename");
}

Hope this helps

jayant

The main reson for that is, that the application also needs to provide some sort of API to the user and it is certainly better to have :

special_inclusion($filename);

instead of

if (special_include($filename)) {
include_once("$filename");
}