Parse input string

Question

I have a strings like this:

index.php?url=index/index
index.php?url=index/index/2&a=b

I'm trying to get this part of string: index/index or index/index/2.

I have tried parse_str function but not successful. Thanks.

echo '
'; parse_str($filename, $output); print_r($output); echo '
'; — XTRUST.ORG, Oct 20 '15 at 18:52
`$filename` is not defined in your comment. Edit your post and put a [mcve] into it. — Josh J, Oct 20 '15 at 18:52
You can use [`parse_url()`](http://php.net/manual/en/function.parse-url.php) to extract the query string and then [`parse_str()`](http://php.net/manual/en/function.parse-url.php) to get at the arguments. — Josh J, Oct 20 '15 at 18:55

score 2 · Accepted Answer · answered Oct 20 '15 at 18:59

You should be able to use $_SERVER['QUERY_STRING'] as shown below:

$url_params = $_SERVER['QUERY_STRING']; // grabs the parameter
$url_params = explode( '/', $url_params ); // seperates the params by '/'

which returns an array

Example index.php?url=index/index2 now becomes:

$url_params[ 0 ] =  index;
$url_params[ 1 ] =  index2;

score 0 · Answer 2 · answered Oct 20 '15 at 18:52

Without more info:

// Example input
$input               = "index.php?url=index/index/2&a=b";
$after_question_mark = explode("=",$input)[1];
$before_ampersand    = explode("&",$after_question_mark)[0];
$desired_output      = $before_ampersand; // 'index/index/2'

More resilient option:

// Example input
$input               = "index.php?url=index/index/2&a=b";
$after_question_mark = explode("=",$input)[1];
if (strstr($after_question_mark, "&")){
    // Check for ampersand
    $before_ampersand    = explode("&",$after_question_mark)[0];
    $desired_output      = $before_ampersand; // 'index/index/2'
} else {
    // No ampersand
    $desire_output       = $after_question_mark;
}

Andrew · Answer 3 · 2015-10-20T19:35:23.447

-1

$url = "index.php?url=index/index/2&a=b";
$query = parse_url($url, PHP_URL_QUERY);
$output = substr($query, $strpos($query, "=") + 1);
output: index/index/2&a=b

This will get you everything after the question mark

You can get more info on parse_url

or

$url = "index.php?url=index/index/2&a=b";
$output = substr($url, strpos("=") +1, $strrpos($url, "&") - strlen($url));
output: index/index/2

You dont need to break into an array to create overhead if you really just want to get a substring from a string

this will return false on no query string

edited Oct 20 '15 at 19:35

answered Oct 20 '15 at 18:54

Andrew

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I have edited my answer to fit your request...but mainly `parse_url` is the function to go for..imho – Andrew Oct 20 '15 at 19:07

Parse input string

3 Answers3