PHP - convert code section from a string to html characters

Question

I have string like this:

<a href="http://google.com"> link </a>
[code lang="html" anotherargument="foo"...]
<a href="http://google.com"> link </a>
[/code]

How can I convert the code wrapped between [code...] and [/code] to HTML characters?

like this:

<a href="http://google.com"> link </a>
[code lang="html" anotherargument="foo"...]
&lt;a href=&quot;http://google.com&quot;&gt; link &lt;/a&gt;
[/code]

chriso · Accepted Answer · 2011-04-02 11:29:46Z

1

Try this

preg_match_all('`\[code[^\]]*+]([^\[]*+)\[/code\]`i', $html, $matches, PREG_SET_ORDER);

foreach ($matches as $match) {
    $html = str_replace($match[1], htmlentities($match[1]), $html);
}

edited Apr 2, 2011 at 11:29

answered Apr 2, 2011 at 8:29

chriso

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2 Comments

Alex Over a year ago

thank you. do you know how can I do the same for <pre lang="html"> ... </pre> ?

chriso Over a year ago

change the pattern string to |<pre[^>]*+>([^<]*+)</pre>|i

Bjoern · Accepted Answer · 2011-04-02 08:25:01Z

1

I think htmlspecialchars or htmlentities have the functionality you are looking for. Both convert characters to HTML entities.

answered Apr 2, 2011 at 8:25

Bjoern

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Comments

Billy Moon · Accepted Answer · 2011-04-02 11:01:46Z

1

You could use regular expressions with a callback - so match the what is between code tags, then replace by running through a function.

Something like this untested code:

$str = preg_replace_callback('/(\[code.+?\])(.+?)(\[\/code\])/', create_function(
            '$m',
            'return $m[1] . htmlentities($m[2]) . $m[3];'
        ),$str)

edited Apr 2, 2011 at 11:01

answered Apr 2, 2011 at 8:28

Billy Moon

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1 Comment

chriso Over a year ago

i think you mean preg_replace_callback

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