> I've been searching php.net for a function to do this:
>
> if page_url('browse.php') {
The $_SERVER global array has this sort of information. The 'PHP_SELF' key
might be what you want:
http://us.php.net/manual/en/reserved.variables.server.php
But where is the code that needs to know? I'm guessing it's in a common library
file that's going to be included in browse.php as well as other scripts, but am
I guessing rightly?
BTW, you could simplify your code slightly by defining $default as an empty
string before the IF block. Then you only have to read from $_GET once.
<?php
$default = "";
if (<url condition>) {
$default = "A";
}
/*
* No need for an "else" any more, now you can just
* set the value of $letter
*/
?>
I'd also suggest using filter_input() rather than reading directly from $_GET:
<?php
$letter = filter_input(INPUT_GET, 'letter', <filter>, [<options>]);
if (empty($letter)) {
$letter = $default;
}
?>
Presumably you'd want to use FILTER_VALIDATE_REGEXP in place of "<filter>" and,
for "<options>", pass a regex that ensures that 'letter' is a single
alphabetical character.
You can read about the filter functions here (sort of, the documentation is a
little sparse):
http://us.php.net/manual/en/ref.filter.php
A VALIDATE_REGEXP example is available here:
http://www.w3schools.com/php/filter_validate_regexp.asp
Ben
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