I am looking for the best <code>br2nl</code> function. I would like to replace all instances of <code><code> </code></code> and <code><code> </code></code> with newlines <code>\n</code>. Much like the nl2br() function but the opposite. I know there are several solutions in the PHP manual comments but I'm looking for feedback from the SO community on possible solutions.

I would generally say "don't use regex to work with HTML", but, on this one, I would probably go with a regex, considering that <code> </code> tags generally look like either : <ul> <li><code> </code></li> <li>or <code> </code>, with any number of spaces before the <code>/</code> </li> </ul> I suppose something like this would do the trick : <pre class="prettyprint"><code>$html = 'this is some text !'; $nl = preg_replace('#<br\s*/?>#i', "\n", $html); echo $nl; </code></pre> Couple of notes : <ul> <li>starts with <code><br</code> </li> <li>followed by any number of white characters : <code>\s*</code> </li> <li>optionnaly, a <code>/</code> : <code>/?</code> </li> <li>and, finally, a <code>></code> </li> <li>and this using a case-insensitive match (<code>#i</code>), as <code> </code> would be valid in HTML</li> </ul>

How to replace all XHTML/HTML line breaks ( ) with new lines?

I am looking for the best br2nl function. I would like to replace all instances of   and   with newlines \n. Much like the nl2br() function but the opposite.

I know there are several solutions in the PHP manual comments but I'm looking for feedback from the SO community on possible solutions.

How do I replace all line breaks in a string with br /> elements?

The RegEx is used with the replace() method to replace all the line breaks in string with . The pattern /(\r\n|\r|\n)/ checks for line breaks. The pattern /g checks across all the string occurrences.

How do you force a new line in HTML?

To do a line break in HTML, use the tag. Simply place the tag wherever you want to force a line break. Since an HTML line break is an empty element, there's no closing tag.

I would generally say "don't use regex to work with HTML", but, on this one, I would probably go with a regex, considering that   tags generally look like either :

 
or  , with any number of spaces before the /

I suppose something like this would do the trick :

$html = 'this <br>is<br/>some<br />text <br    />!'; $nl = preg_replace('#<br\s*/?>#i', "\n", $html); echo $nl;

Couple of notes :

starts with <br
followed by any number of white characters : \s*
optionnaly, a / : /?
and, finally, a >
and this using a case-insensitive match (#i), as   would be valid in HTML

How to replace all XHTML/HTML line breaks (<br>) with new lines?

Tags:

regex

php

newline

markb

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1 Answers

Pascal MARTIN

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