Replace some strings in PHP with regex?

Question

I need to do a simple regex find and replace with PHP for my syntax highlighting script in PHP.

I need to take a string of code which will actually be a whole php file that is read into a string like this.

$code_string = 'the whole source code of a php file will be held in this string';

And then find all occurences of these and do a replace...

Find: [php] and replace with <pre class="brush: php;">
Find: [/php] and replace with </pre>

Find [javascript] and replace with <pre class="brush: js;">
Find: [/javascript] and replace with </pre>

I really am not good with regex could someone please help me with this?

@thephpdeveloper: some JS plugins use such weird classes to specify parameters, though they usually require no spaces anywhere in the relevant class (i.e. unrelatedclass brush:js; rather than unrelatedclass brush: js;). — Max Shawabkeh
– Max Shawabkeh, Commented Jan 28, 2010 at 5:37

Sam Becker · Accepted Answer · 2010-01-28 05:26:35Z

4

For the replacement of strings within strings you can just str_replace();. If I understand your question correctly it would look something like this:

$code_string = htmlentities(file_get_contents("file.php"));
$old = array("[php]","[javascript]","[/php]","[/javascript]");
$new = array('<pre class="brush: php;">','<pre class="brush: js;">','</pre>','</pre>');
$new_code_string = str_replace($old,$new,$code_string);
echo $new_code_string;

edited Jan 28, 2010 at 5:26

answered Jan 28, 2010 at 5:19

Sam Becker

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rob · Accepted Answer · 2010-01-28 05:42:11Z

0

$out = preg_replace(
  array(
   '/\<\?(php)?(.*)\?\>/s',
   '/\<script(.*) type\=\"text\/javascript\"(.*)\>(.+)\<\/script\>/s'
  ),
  array(
   '<pre class="brush: php;">$2</pre>',
   '<pre class="brush: js;">$3</pre>'
  ),
  $code
 );

Will replace any PHP source within open and close tags (short and long), will replace any JS source within script tags with at least one character (will avoid script tags linked to javascript source files).

answered Jan 28, 2010 at 5:42

rob

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