regex preg_replace breaks when bbcode

Question

I'm creating highlights of the searchwords on the results page.

This is what I use now:

$resmessage = preg_replace ( '/' . preg_quote ( $searchword, '/' ) . "/iu", '<span  class="searchword" >' . $searchword . '</span>', $resmessage );

But when the word is an title name on a attachment is will break the layout.

example text:

test ok /n[attachment=1]test-2.png[/attachment]

The result:

test ok test-2.png" title="test-2.png" rel="lightbox[imagelink2]">  test-2.png" style="max-height:800px;" alt="" />

So I want exclude none character before searchword. What is the regex to do that, I have tried many options.

What do you mean by none character? Whitespace?... or what is $searchword so I can run the test locally. — chris85
– chris85, Commented Jun 15, 2015 at 23:42
So if white space trails the search term replace it? From example output should be testok /n[attachment=1]test-2.png[/attachment], is that right? — chris85
– chris85, Commented Jun 16, 2015 at 0:00
Or bold is the best way, so you have: [b]test[/b]ok n[attachment=1]test-2.png[/attachment], There must be a space after the searchword to find the word — 810
– 810, Commented Jun 16, 2015 at 0:09

Marcos Dimitrio · Accepted Answer · 2015-06-16 01:06:55Z

2

You can do it by using regex backtracking control verbs (the (*SKIP)(*FAIL) part).

This will allow you to match any string that is not inside BBcode (either between tags or the tag name itself):

$searchword = "test";

$resmessage  = "test attachment ok \n[attachment=1]test-2.png[/attachment] test ";
$resmessage .= "[test]test[/test] ok [attachment=1]my-test-2.png[/attachment] test";

$pattern = '/\[.+?\].*?\[\/.+?\](*SKIP)(*FAIL)|' . 
    preg_quote($searchword, '/') . 
    "/iu";

$resmessage = preg_replace(
    $pattern, 
    '<span class="searchword">' . $searchword . '</span>', 
    $resmessage
);

This will return:

<span class="searchword">test</span> attachment ok 
[attachment=1]test-2.png[/attachment] <span class="searchword">test</span> 
[test]test[/test] ok [attachment=1]my-test-2.png[/attachment] 
<span class="searchword">test</span>

edited Jun 16, 2015 at 1:06

answered Jun 16, 2015 at 0:48

Marcos Dimitrio

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8 Comments

810 Over a year ago

This will break the bbcode. Same as in my first post.

Marcos Dimitrio Over a year ago

Could you provide an example of the code that breaks?

Marcos Dimitrio Over a year ago

Sorry, that's not what I meant. I didn't mean the broken code, I need the original string before it goes through any processing.

810 Over a year ago

original string: test ok /n[attachment=1]test-2.png[/attachment]

Marcos Dimitrio Over a year ago

It works fine for me: ideone.com/fork/a0X5Nv, access it and click run, you'll get: test ok /n[attachment=1]test-2.png[/attachment]

|

chris85 · Accepted Answer · 2015-06-16 00:15:05Z

1

This should do it for you. \s is a white space (tab, new line, or space), + says one or more occurances of a white space character.

<?php
$resmessage = "test ok /n[attachment=1]test-2.png[/attachment]";
$searchword = 'test';
echo preg_replace ( '/' . preg_quote ( $searchword, '/' ) . "\s+/iu", '<span  class="searchword" >' . $searchword . '</span>', $resmessage);

Output:

<span  class="searchword" >test</span>ok /n[attachment=1]test-2.png[/attachment]

You can replace it with whatever you want the second parameter of preg_replace is what you want there. http://php.net/manual/en/function.preg-replace.php

So

echo preg_replace ( '/' . preg_quote ( $searchword, '/' ) . "\s+/iu", '[b]' . $searchword . '[/b]', $resmessage);

would give you

[b]test[/b]ok /n[attachment=1]test-2.png[/attachment]

answered Jun 16, 2015 at 0:15

chris85

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5 Comments

810 Over a year ago

Works almost. When the Title is just "test" then isn't highlighted

chris85 Over a year ago

Can you provide a full sample on input with test in it? In your above example would it become testok test-2.png" title="test-2.png" rel="lightbox[imagelink2]"> test-2.png" style="max-height:800px;" alt="" />? You could change the + to a * but that's the equivalent of not checking for the whitespace because it no longer would be required.

810 Over a year ago

<?php $resmessage = 'test'; $searchword = 'test'; echo preg_replace ( '/' . preg_quote ( $searchword, '/' ) . "\s+/iu", '' . $searchword . '', $resmessage);

chris85 Over a year ago

No, I mean when $resmessage, the string you are searching, would have the search term without a space and you'd want to find it. For example what if you had tester, testing, testosterone, testimonials, etc. in your string would you still want to only find test? If so all would become [b]test[/b]....ending of word, is that what you'd want?

810 Over a year ago

What I want is to highlight all search terms, except in attachments or url bbcodes. Because the bbcode changed to html, and breaks the image result, and showed the html as in: s24.postimg.org/xmgd4jgl1/Untitled.jpg So I want a regex to search words except [*] is for the searchword

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