bbcode

function BBCode($string){
    $patterns = array(
        '`\*\*(.+?)\*\*`is',
        '`\*(.+?)\*`is',
        '`%%(.+?)%%`is',
        '`\[b\](.+?)\[/b\]`is',
        '`\[i\](.+?)\[/i\]`is',
        '`\[u\](.+?)\[/u\]`is',
        '`\[s\](.+?)\[/s\]`is',
        '`\[spoiler\](.+?)\[/spoiler\]`is',
        '`\[lination\](.+?)\[/lination\]`is',
        );
    $replaces =  array(
        '<b>\\1</b>',
        '<i>\\1</i>',
        '<span class="spoiler">\\1</span>',
        '<b>\\1</b>',
        '<i>\\1</i>',
        '<span style="border-bottom: 1px solid">\\1</span>',
        '<strike>\\1</strike>',
        '<span class="spoiler">\\1</span>',
        '<span style="color: #D14836; border-bottom: 1px dashed #D14836;">\\1</span>',
        );
    $string = preg_replace($patterns, $replaces , $string);
    $string = preg_replace_callback('`\[code\](.+?)\[/code\]`is', array(&$this, 'code_callback'), $string);

    return $string;
}