nayen
May 15, 2014, 2:10pm
1
Hi,
I have the following function that I use to display code on my page.
function filter_code($text) {
if (preg_match_all('/\\[CODE\\](.*)\\[\\/CODE]/msU', $text, $callbacks)) {
$replace = $callbacks[0];
$with = preg_replace('/ /', ' ', $callbacks[1]);
foreach ($callbacks[1] as $k => $v) {
$text = str_replace($replace[$k], htmlspecialchars($with[$k]), $text);
$text = preg_replace('/ /', ' ', $text);
}
$removeTags = array('
', ’
');
$text = str_replace($removeTags, '', $text);
}
return $text;
}
For example this function gets the following code piece in the post body
<!DOCTYPE html>
and displays it on the page as code. With one issue though, it does not take new lines into account and displays it like this:
<!DOCTYPE html> <html> <head> <title>My Web Page</title> </head> <body> <p>Welcome to my web page!</p> </body> </html>
How can I modify it so that it will display with new lines as shown above? Thanks for any ideas.
Have you tried highlight_file() or highlight_string()?
Poked from a tablet
I’m not sure if this will work for you, but you could try using a <pre> tag: http://www.w3schools.com/tags/tag_pre.asp
nayen
May 16, 2014, 7:23am
4
Tried after you mentioned but didn’t work.
<pre> tag preformats the text, it doesn’t display html code on the page. Thanks, though.
Maybe use PHP heredoc and HTML <pre> :
<?php
$code=<<<CODE
<!DOCTYPE html>
<html>
<head>
<title>My Web Page</title>
</head>
<body>
<p>Welcome to my web page!</p>
</body>
</html>
CODE;
$style='float:left; background-color:lightgreen; color:black; padding: 0.42em; outline:dotted: 2px #f00';
echo '<pre style="'.$style .'">';
echo htmlspecialchars($code ) ;
echo '</pre>';
?>
Output:
<!DOCTYPE html>
Beware of trailing spaces when using heredoc
Have you tried highlight_file() or highlight_string()?
I use both the above on my website without a problem; I would guess you are removing some important character in your function.
I recommend starting your function from fresh using highlight_string() and the absolute basic code and build up from there.
nayen
May 16, 2014, 7:48am
7
John, thank you but I can’t use that because the post is stored in database. I can’t have PHP code in it.
the post is stored in database
Is the data stored in the database correctly - check with phpmyadmin.
nayen
May 16, 2014, 7:53am
9
I think so. Why did you ask that? Can you store PHP code in database? Also if you can give a working example for highlight_string() that displays HTML code on the screen, it will be much appreciated.
Thank you.
If the text is stored in a database then try this:
echo nl2br( $text );
// or
echo nl2br( htmlspecialchars($text ) );
nayen
May 16, 2014, 7:59am
11
Well, I had that but it adds a new line to whole post body. I just want to add a new line between CODE tags in my post body.
<p>This is my post body</p>
<p>This is sample code</p>
<p>This is some more text</p>
Like in a way the function replaces empty spaces like this:
$with = preg_replace('/ /', ' ', $callbacks[1]);
