Regex: Fix duplicate slashes without affecting protocol

Let’s say you want to fix a URL that looks like:

https://www.example.com/my/path//to-file.jpg

Using a string replace or a simple regex could incorrectly “fix” the double slashes following the protocol. We can fix that by using a negative lookb…


This content originally appeared on DEV Community and was authored by Matt Kenefick

Let’s say you want to fix a URL that looks like:

https://www.example.com/my/path//to-file.jpg

Using a string replace or a simple regex could incorrectly “fix” the double slashes following the protocol. We can fix that by using a negative lookbehind.

(?<!:)/+

For PHP: 

<?php
$url = 'https://www.example.com/my/path//to-file.jpg';
$str = preg_replace('#(?<!:)/+#im', '/', $url);
// https://www.example.com/my/path/to-file.jpg

For Javascript: 

let url = 'https://www.example.com/my/path//to-file.jpg';
url.replaceAll(/(?<!:)\/+/gm, '/');
// "https://www.example.com/my/path/to-file.jpg"


This content originally appeared on DEV Community and was authored by Matt Kenefick


Print Share Comment Cite Upload Translate Updates
APA

Matt Kenefick | Sciencx (2021-05-13T15:34:48+00:00) Regex: Fix duplicate slashes without affecting protocol. Retrieved from https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/

MLA
" » Regex: Fix duplicate slashes without affecting protocol." Matt Kenefick | Sciencx - Thursday May 13, 2021, https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/
HARVARD
Matt Kenefick | Sciencx Thursday May 13, 2021 » Regex: Fix duplicate slashes without affecting protocol., viewed ,<https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/>
VANCOUVER
Matt Kenefick | Sciencx - » Regex: Fix duplicate slashes without affecting protocol. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/
CHICAGO
" » Regex: Fix duplicate slashes without affecting protocol." Matt Kenefick | Sciencx - Accessed . https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/
IEEE
" » Regex: Fix duplicate slashes without affecting protocol." Matt Kenefick | Sciencx [Online]. Available: https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/. [Accessed: ]
rf:citation
» Regex: Fix duplicate slashes without affecting protocol | Matt Kenefick | Sciencx | https://www.scien.cx/2021/05/13/regex-fix-duplicate-slashes-without-affecting-protocol/ |

Please log in to upload a file.



There are no updates yet.
Click the Upload button above to add an update.

You must be logged in to translate posts. Please log in or register.

Related Posts