How can I take an id from the url in php and use it like a number?

Question

I have a url that will look as follows.

post/:id

I am exploding the $_SERVER['REQUEST_URI'];

and I need to make the $uri[2] is numerical so I can do things like

$next = $uri[2]++;

I have tried is_numeric but of course the request_uri is a string (broken into an array of strings).

Can I type cast in php to integer?

http://php.net/manual/en/language.types.type-juggling.php#language.types.typecasting — Hamish, Jul 26 '12 at 23:30
I know PHP is dynamically typed, but its always a string, I need to cast to integer. — James Vince, Jul 26 '12 at 23:31
Yeees... and the section that I linked to "Type Casting" explains how to do it. — Hamish, Jul 26 '12 at 23:32
Hamish if you wanna make that an answer Although David is right, you did get there first so you kinda deserve the credit. — James Vince, Jul 26 '12 at 23:37
No, that's fine, I didn't post an answer, although I would recommend to David that he should link to documentation where possible. — Hamish, Jul 26 '12 at 23:39

score 3 · Accepted Answer · answered Jul 26 '12 at 23:31

3

$int = (int) $uri[2];

You just have to convert from string to integer.

answered Jul 26 '12 at 23:31

David

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score 1 · Answer 2 · edited May 23 '17 at 10:26

Have you tried intval(): http://php.net/manual/en/function.intval.php?

int intval(mixed $var [, int $base = 10 ])

"Returns the integer value of var, using the specified base for the conversion (the default is base 10). intval() should not be used on objects, as doing so will emit an E_NOTICE level error and return 1."

UPDATE

Having wondered what the difference between (int) $string and intval($string) is, there are some interesting comments on previous SO questions;

(int) is upto 600% faster
intval makes it easier to typecast within other functions
intval has the benefit of changing base (although this is fairly obscure)
intval is more readable (tho this is obviously very subjective)

score 0 · Answer 3 · edited May 23 '17 at 10:26

Just to clarify both David and ChrisW are correct. Those are two ways of doing it as described at http://www.php.net/manual/en/language.types.integer.php#language.types.integer.casting

<?php

$str = '100';

var_dump( $str ); // string(3) "100"

// http://php.net/manual/en/function.intval.php
var_dump( intval($str) ); // int(100)

// http://php.net/manual/en/language.types.type-juggling.php
var_dump( (int) $str ); // int(100)

?>

score 0 · Answer 4 · answered Jul 15 '15 at 04:50

you can just take it as a number from url passing argument in as a $_GET request.

Or pass through as a $_POST request.

But in the case of $_POST request we cann't pass the value to url. if you want you can using $_SERVER['REQUEST_URI'] and convert to (int) $_GET['pid'].

How can I take an id from the url in php and use it like a number?

4 Answers4