simple string operation not working..

[maya8989]

hi, this is my first positing here..  I've been wracking my brains with this for two days now.. 

it's something so simple and elemental, that I have done so many times, I can't understand why it's not working.. (I'm pre-PHP 8 )

$Host = $_SERVER['HTTP_HOST'];    //  evaluates to "localhost:8888" (MAMP localhost)
$HostLength = strlen($Host);  // evaluates to 14

// but this returns 0!!
$isLocalhost = strpos($Host, 'localhost');
echo "$isLocalhost";  // prints "0"

I use this to test whether user is on localhost on the server.. thus..

if ($isLocalhost) {   <load this or that or the other>; }
//  if on localhost the condition is not met!!

(and needless to say, I have so far tested this only on localhost..)

I can't understand why this is not working..

would appreciate some help..

thank you very much..
 

Edited March 19, 2023 by maya8989
typo

[Barand]

Looking up strpos() in the manual would have explained exactly what your problem is, and the first example gives you the cure.

[maya8989]

hi Brand, 

thank you for your response...

wow.. that worked.. thank you...   now the reason this surprises me is that I do this throughout the website (& another website)

$atEmpl = strpos($URL, 'empl.php');
if ($atEmpl) { $bodyClass = "empl"; } 

and it's always worked....  

so why does the above code work for detecting a substring in the current URL and not for detecting a substring in the localhost var ($_SERVER['HTTP_HOST'], which is also a string..)

(so should I change the above code too?  
to 

if ($atEmpl !== false) {

?)

thank you for your help.....

Edited March 19, 2023 by maya8989

[Barand]

41 minutes ago, maya8989 said:

so why does the above code work for detecting a substring in the current URL and not for detecting a substring in the localhost var ($_SERVER['HTTP_HOST'], which is also a string..)

Beacause in this case, the "needle" is at position 0

evaluates to "localhost:8888"
              ^
             pos 0

 

[requinix]

https://www.php.net/manual/en/function.str-contains.php