Remove a string and a number from the end of string in PHP

Question

Fairly new to PHP and trying to figure out something that I can't get my head around too.

I have a URL below where I want to remove &page_number=x. The page_number variable and the number has to be removed with the function, which will always be at the end of the string.

http://url.com/search/?location=london&page_number=1

I have tried a few versions of preg_replace but I am not having any luck.

Thanks

[`parse_url`](http://php.net/parse_url) and [`parse_str`](http://php.net/parse_str) would also be suitable. — mario, Dec 29 '14 at 13:16
As this is a duplicate question I have provided an answer to the linked one that does what you want the way it should be done. — Sergey Telshevsky, Dec 29 '14 at 13:26

score 1 · Answer 1 · answered Dec 29 '14 at 13:16

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&page_numer=\d+$

Try this.Replace by empty string.

See demo.

https://regex101.com/r/gX5qF3/10

answered Dec 29 '14 at 13:16

vks

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I think somebody randomly downvoted every answer for this question. All suddenly droped 1 vote. – Sebi Dec 29 '14 at 13:30
Really. My answer has been upvoted and downvoted and i have zero now – Dmitri Kadykov Dec 29 '14 at 13:32
@DmitriKadykov can we somehow bring this for consideration to moderator – vks Dec 29 '14 at 13:33
I don't know if it's possible. Maybe this way: http://stackoverflow.com/questions/ask – Dmitri Kadykov Dec 29 '14 at 13:35
@DmitriKadykov that we get 3 or 4 more downvotes : – vks Dec 29 '14 at 13:36
@DmitriKadykov I would use [meta](http://meta.stackoverflow.com) for that, if I were to ask about something like that – Sebi Dec 29 '14 at 13:42

score 1 · Answer 2 · answered Dec 29 '14 at 13:17

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If its the current page it can be done like this:

 unset($_GET['page_number']);
 $newStr='?'.http_build_query($_GET);

answered Dec 29 '14 at 13:17

andrew

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score 1 · Accepted Answer · edited Dec 29 '14 at 13:21

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$str = 'http://url.com/search/?location=london&page_number=1';
$str = preg_replace('/[?&]page_number=\d+/', '', $str);

edited Dec 29 '14 at 13:21

Zaffy

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answered Dec 29 '14 at 13:18

Dmitri Kadykov

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Hi thank you for this brilliant solution. I love regular expressions and this does exactly what it needs to. Happy New Year may it bring great fortunes for you :) – Cam Dec 29 '14 at 13:41
Thank you for your wish :) And thanks @Zaffy for correct editing – Dmitri Kadykov Dec 29 '14 at 13:43

Sebi · Answer 4 · 2014-12-29T13:38:41.687

0

The following code should remove it without regex's or expensive explode:

$str = 'http://url.com/search/?location=london&page_number=1';
$cropped = substr($str, 0, strrpos($str, '&page_number='));
// $cropped is 'http://url.com/search/?location=london'

First, it looks for position of last occurance of &page_number= using strrpos, then crops the string up to that occurance using substr.

Note: This assumes that the parameter that you want to remove is at the end.

edited Dec 29 '14 at 13:38

answered Dec 29 '14 at 13:18

Sebi

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Can the downvoter please provide me some feedback on what's wrong with my answer? – Sebi Dec 29 '14 at 13:28
Hi thank you for the solution. I have tried it and it works also. Much appreciated for your time. – Cam Dec 29 '14 at 13:40

Remove a string and a number from the end of string in PHP

4 Answers4