PHP Preg_replace not working with
and new line together

Question

I have a Json file with html content in some rows, how ever everytime I try to use preg_replace to match this combination of a break and new line it doesn't work.

For example, <br> No atraviesa el papel

Want to replace with: <br>No atraviesa el papel

Already tried:

$pattern = '/<br>\n/m';
$subs = '<br>';
$json_response = preg_replace($pattern, $subs, $json_response);

Im looking to remove the newline and leave only the <br>

Are you sure you have `\n` and not a windows new line? Does `
\v` work? — user3783243, Sep 10 '19 at 01:14
@user3783243 I clearly need more coffee. You're probably on the right track with `\v` although it might need to be `\v+` if there's a `\r\n` sequence — Nick, Sep 10 '19 at 01:16
.. you could even do `
\s*` if you just want to remove all whitespace after a `
`. — user3783243, Sep 10 '19 at 01:33

Aleksandar · Answer 1 · 2019-09-10T03:00:05.833

0

You need to start with a positive lookahead.
And then substitute the match with an empty string.

/(?<=<br>)\s*\R/

Demo on regex101

edit: added a match for white space, if there is any after the <br>
edit: made it more concise and universal with the help of @ user3783243

edited Sep 10 '19 at 03:00

answered Sep 10 '19 at 01:34

Aleksandar

1,496
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1

There is no `g` in PHP. `\v` covers vertical spaces, for any type of new line `\R` should be used. – user3783243 Sep 10 '19 at 02:02
@user3783243: So you would suggest `/(?<=
)\s*\R/m` would be more concise and universal solution? – Aleksandar Sep 10 '19 at 02:10
1

Probably `/(?<=
)\s*\R/`. The `m` also has no context because there are no anchors – user3783243 Sep 10 '19 at 02:15

score 0 · Answer 2 · answered Sep 10 '19 at 03:12

0

Is it something you are looking for?

<?php

$json_response="<br>
No atraviesa el papel
";

$tobe = "<br>No atraviesa el papel
";

$pattern = '/<br>([\r\n]+)/is';
$subs = "<br>";
$json_response = preg_replace($pattern, $subs, $json_response);

echo $json_response;
echo "\r\n", $json_response==$tobe?"Matched":"Did not match";

It outputs: Matched.

answered Sep 10 '19 at 03:12

Bimal Poudel

1,214
2
18
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([\r\n]+) could be (\s+) as well. – Bimal Poudel Sep 10 '19 at 03:13

PHP Preg_replace not working with and new line together

2 Answers2

PHP Preg_replace not working with
and new line together