PHP Help with referencing url in code

[chrisj]

I am trying to display something on web pages that show this in the url: “sub__” for example: …com/videos/category/1/sub__536. It was suggested that I try some code like this:

$page = basename($_SERVER['PHP_SELF']);
if ($page=="content.php") {
echo Hello World;
} elseif ($page=="content.php") {
Some Other code...
}

but I don’t know where to place the url in that code to make it purposeful.
And I’m not sure that I need if/else, just would like if: /videos/category/1/sub__ then show echo

The code above just gives a 404 error.

Any help/suggestions with display something on web pages that show this in the url: "sub__" is appreciated

 

[Mutiny]

So you want to display something on the page if "sub_" is in the URL?

Probably something like:

if(stristr($_SERVER['REQUEST_URI']), "sub_" !== false) {
    echo "Found sub_ in URL!";
}

The $_SERVER['REQUEST_URI'] variable gets the URL as it's seen in the browser whereas $_SERVER['PHP_SELF']) gets the filename of the PHP file currently executing.

 

[chrisj]

Thanks for your reply, however after putting this on the html page:

        <?php
if(stristr($_SERVER['REQUEST_URI']), "sub_" !== false) {
    echo "Found sub_ in URL!";
}
?>

I get a 404 error.

Any additional suggestions are appreciated

 

[OldMan]

Mutiny had a parenthesis sign out of place. Use this:
if(stristr($_SERVER['REQUEST_URI'],"sub_" )!== false) {

 

[chrisj]

Thank you that worked.

if(stristr($_SERVER['REQUEST_URI'],"sub_" )!== false) {

but I have found that this also works:

if (preg_match('#/?sub__[\d]+$#',$_SERVER['REQUEST_URI'])) {

what is the difference between the two? And which one is best to use?

 

[OldMan]

Chrisj you can find this out in the PHP manual.
Both look for a match. The top one matches a string to a string, the bottom one matches a regular expression to a string.
I personally don't write them. I have stayed away from writing them my entire career. If one is needed you can look them up on line most of the time..