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Editorial Team
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Asked: 2026-06-17T11:08:43+00:00

I need to replace BBCode quotes from a phpBB3 forum using PHP. Quoted posts

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I need to replace BBCode quotes from a phpBB3 forum using PHP. Quoted posts look like this:

[quote="John Doe":2sxn61wz][quote="Bob":2sxn61wz]Some text from Bob[/quote:2sxn61wz]Some text from John Doe[/quote:2sxn61wz]Some more text

I would like to parse this string and end up with an array like:

Array (

    [0] => Array (

        [0] => 'John Doe' 
        [1] => 'Some text from John Doe'
    )

    [1] => Array (

        [0] => 'Bob' 
        [1] => 'Some text from Bob'
    )
)

What would be the best approach to recursively find these quote blocks and their content? Thanks in advance for any help on that!

As suggested in the comments:

$str = '[quote="John Doe":2sxn61wz][quote="Bob":2sxn61wz]Some text from Bob[/quote:2sxn61wz]Some text from John Doe[/quote:2sxn61wz]Some more text';
$uid = '2sxn61wz';

print_r(quoteParser($str, $uid));

function quoteParser($str, $uid) {

    $pattern = "#\[quote(?:="(.*?)")?:$uid\]((?!\[quote(?:=".*?")?:$uid\]).)?#ise";

    echo "Unparsed string: " . $str . "<br /><br />";
    echo "Pattern: " . $pattern . "<br /><br />";

    preg_match_all($pattern, $str, $matches);

    return $matches;
}

Output:

Array ( [0] => Array ( [0] => [quote="John Doe":2sxn61wz] [1] => [quote="Bob":2sxn61wz]S ) [1] => Array ( [0] => John Doe [1] => Bob ) [2] => Array ( [0] => [1] => S ) )

That’s quite what I need but I don’t get the quoted text. Only the user names. Any help? Thanks so far.

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1 Answer

  1. Editorial Team

    Apparently what you’re wanting is to turn your BBCode output into HTML. You can check the bbcode_create() function if you like. Otherwise a different recursion -to format your text- is a better option, I believe.

    <style type="text/css">

    body {
        font-size:.9em;
        font-family:Arial, Helvetica, sans-serif;
    }

    .post {
        margin:1em;
        padding:1em;
        font-size:1em;
        border:1px solid #999;
    }
    .post > .text {margin:1em .4em}
    .post > div:first-child {margin-top:0}
    .post > div:last-child {margin-bottom:0}

    .post > .quote {border-color:#CCC}
    .quote {
        margin:1em 2em;
        background-color:#F9F9F9;
        border:1px solid #AAA;
        font-style:italic;
    }
    .quote .text {margin:.7em 1em}
    .quote .author {
        color:#039;
        font-size:.8em;
        background-color:#E0E0E0;
        padding:.5em .8em;
        margin:.5em;
    }
    .author a {
        font-weight:bold;
        text-decoration:none;
        color:inherit;
    }
    .author a:hover {text-decoration:underline;}

</style>

    function str2html($str,$className='post') {
    $patPost =
    '~(
        \[quote=&quot;(?:(?!&quot;).)+&quot;:(\w+)(?:\])
            (?:
                (?(?=\[quote=&quot;(?:(?!&quot;).+)&quot;:\w+\])
                    (?R)
                    |
                    (?(?!\[/quote:\2\]).)
                )*
            )
        \[/quote:\2\]
    )~xis';
    // note that these 2 are not identical
    $patQuote =
    '~
        (\[quote=&quot;((?:(?!&quot;).)+)&quot;:(\w+)(?:\]))
            (
                (?(?=\[quote=&quot;(?:(?!&quot;).+)&quot;:\w+\])
                    (?R)
                    |
                    (?(?!\[/quote:\3\]).)
                )*
            )
        (\[/quote:\3\])
    ~xis';

    $arr = preg_split($patPost,$str,-1,PREG_SPLIT_DELIM_CAPTURE);
    foreach ($arr as &$value) $value = trim($value);
    unset($value);
    //echo '<h2>split post</h2>'; print_r($arr);

    $res = empty($className) ? '' : "<div class=\"{$className}\">";
    for ($i = 0; $i < count($arr); $i += 3) {
        if (!empty($arr[$i]))
            $res .= '<div class="text">' . $arr[$i] . '</div>';
        if (!empty($arr[$i+1]))
            $res .= preg_replace_callback($patQuote,'replaceQuote',$arr[$i+1]);
    }
    $res .= empty($className) ? '' : '</div>';
    return $res;
}
function replaceQuote($m) {
    //echo '<h2>replacing quotes</h2>'; print_r($m);
    $res = '<div class="quote">';
    $res .= '<div class="author">';
    $res .= '<a href="">' . $m[2] . '</a> wrote:';
    $res .= '</div>';
    $res .= str2html($m[4],'');
    $res .= '</div>';
    return $res;
}

    You can call this by echo str2html('some string here'). You get the idea.

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