[FIXED] How to get part of a URL?

Issue

How can I remove all the parts from url except base url and first part. There is no certainty in number of parts. Base url is variable. I tried some regex but in vain.

$url =  http://www.example.com/part1/part2/part3/part4;
base_url = parse_url($url, PHP_URL_HOST); // Outputs www.example.com

$desired_output = http://www.example.com/part1;

Solution

Here we can use a preg_replace, with a simple expression, maybe similar to:

(.+\.com\/.+?\/).+

where we are capturing our desired output using this capturing group:

(.+\.com\/.+?\/)

and then we swipe to the end of string and replace it with $1.

Test

$re = '/(.+\.com\/.+?\/).+/m';
$str = 'http://www.example.com/part1/part2/part3/part4';
$subst = '$1';

$result = preg_replace($re, $subst, $str);

echo $result;

DEMO

RegEx Circuit

jex.im visualizes regular expressions:

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For all domains .com or not, we might be able to solve it with this expression:

(.+\..+?\/.+?\/).+

Test

$re = '/(.+\..+?\/.+?\/).+/m';
$str = 'http://www.example.com/part1/part2/part3/part4';
$subst = '$1';

$result = preg_replace($re, $subst, $str);

echo $result;

Demo

Answered By - Emma

Answer Checked By - Mary Flores (PHPFixing Volunteer)