, 2018
https://github.com/greg-kennedy/php-bbcode
This is public domain software. Please see LICENSE for more details.
******************************************************************************/
class BBCode
{
// Tag aliases. Item on left translates to item on right.
const TAG_ALIAS = [
'url' => 'a',
'code' => 'pre',
'quote' => 'blockquote',
'*' => 'li',
'list' => 'ul'
];
// helper function: normalize a potential "tag"
// convert to lowercase and check against the alias list
// returns a named array with details about the tag
static private function decode_tag($input) : array
{
// first determine if it's opening on closing tag, then substr out the inner portion
if ($input[1] === '/') {
$open = 0;
$inner = substr($input, 2, -1);
} else {
$open = 1;
$inner = substr($input, 1, -1);
}
// oneliner to burst inner by spaces, then burst each of those by equals signs
$params = array_map(
function($a) { return explode('=', $a, 2); },
explode(' ', $inner));
// first "param" is special - it's the tag name and (optionally) the default arg
$first = array_shift($params);
// tag name
$name = strtolower($first[0]);
if (isset(self::TAG_ALIAS[$name])) {
$name = self::TAG_ALIAS[$name];
}
// "default" (unnamed) argument
$args = null;
if (isset ($first[1])) {
$args['default'] = $first[1];
//echo $first[1];
}
// finally, put the rest of the args in the list
//array_walk( $params, function(&$a, $i, &$args) { print_r($args); $args[strtolower($a[1])] = $a[0]; }, $args);
foreach ($params as &$param) {
$k = isset($param[0]) ? strtolower($param[0]) : '';
$v = isset($param[1]) ? $param[1] : '';
$args[$k] = $v;
}
return [ 'name' => $name, 'open' => $open, 'args' => $args ];
}
// helper function: normalize HTML entities, with newline handling
static private function encode($input) : string
{
return $input;
// break substring into individual unicode chars
$characters = preg_split('//u', $input, null, PREG_SPLIT_NO_EMPTY);
// append each one-at-a-time to create output
$lf = 0;
$output = '';
foreach ($characters as &$ch)
{
if ($ch === "\n") {
$lf ++;
} elseif ($ch === "\r") {
continue;
} else {
if ($lf === 1) {
$output .= "\n
";
$lf = 0;
} elseif ($lf > 1) {
$output .= "\n\n";
$lf = 0;
}
if ($ch === '<') {
$output .= '<';
} elseif ($ch === '>') {
$output .= '>';
} elseif ($ch === '&') {
$output .= '&';
} elseif ($ch === "\u{00A0}") {
$output .= ' ';
} else {
$output .= $ch;
}
}
}
// trailing linefeed handle
if ($lf === 1) {
$output .= "\n
";
} elseif ($lf > 1) {
$output .= "\n\n
";
}
return $output;
}
// Renders a BBCode string to HTML, for inclusion into a document.
static public function bbcode_to_html($input) : string
{
global $MSG_TOTAL;
global $MSG_NUMBER_OF_PROBLEMS;
// split input string into array using regex, UTF-8 aware
// this should give us tokens to work with
// The regex is: one or more characters within square brackets,
// where the characters are any in this list (allowable URI chars):
// ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 -._~:/?#@!$&'()*+,;=%
// Square brackets are technically allowed, but excluded here, because they interfere.
$match_count = preg_match_all("/\[[A-Za-z0-9 \-._~:\/?#@!$&'()*+,;=%]+\]/u",
$input, $matches, PREG_OFFSET_CAPTURE);
if ($match_count === FALSE) {
throw new RuntimeException('Fatal error in preg_match_all for BBCode tags');
}
// begin with the empty string
$output = '';
$input_ptr = 0;
$plist_color = Array('panel-success','panel-info','panel-warning','panel-danger');
global $colorIndex;
$stack = [];
for ($match_idx = 0; $match_idx < $match_count; $match_idx ++)
{
list($match, $offset) = $matches[0][$match_idx];
// pick up chars between tags and HTML-encode them
$output .= self::encode(substr($input, $input_ptr, $offset - $input_ptr));
// advance input_ptr to just past the current tag
$input_ptr = $offset + strlen($match);
// decode the tag 7.0 do not supported (16.04)
//list('name' => $name, 'open' => $open, 'args' => $args) = self::decode_tag($match);
$decode_data= self::decode_tag($match);
$name=$decode_data['name'];
$open=$decode_data['open'];
$args=$decode_data['args'];
if (! $open) {
// CLOSING TAG
// Search the tag stack and see if the opening tag was pushed into it
if (array_search($name, $stack, TRUE) === FALSE) {
// Attempted to close a tag that was not on the stack!
$output = $output . self::encode($match);
} else {
//pop repeatedly until we pop the tag, and close everything on the way
do {
$popped_name = array_pop($stack);
$output = $output . '';
} while ($name !== $popped_name);
}
} else {
// OPENING TAG
// Big if / elseif ladder to handle each tag
if ($name === 'b' || $name === 'u' || $name === 'sup' || $name === 'sub' ||
$name === 'blockquote' ||
$name === 'ol' || $name === 'ul' ||
$name === 'table') {
// Simple tags (no validation or alternate modes)
$stack[] = $name;
$output = $output . '<' . $name . '>';
} elseif ($name === 'li') {
// Disallow [li] outside of [ol] or [ul]
if (array_search('ol', $stack, TRUE) !== FALSE ||
array_search('ul', $stack, TRUE) !== FALSE) {
$stack[] = 'li';
$output .= '
';
} else {
$output .= self::encode($match);
}
} elseif ($name === 'tr') {
// Disallow [tr] outside of [table]
if (array_search('table', $stack, TRUE) !== FALSE) {
$stack[] = 'tr';
$output .= '';
} else {
$output .= self::encode($match);
}
} elseif ($name === 'td' || $name === 'th') {
// Disallow [th] / [td] outside of [tr] outside of [table]
$tr_index = array_search('tr', $stack, TRUE);
$table_index = array_search('table', $stack, TRUE);
if ($tr_index !== FALSE && $table_index !== FALSE && $table_index < $tr_index) {
$stack[] = $name;
$output = $output . '<' . $name . '>';
} else {
$output .= self::encode($match);
}
} elseif ($name === 'font') {
// Font size adjustment. This requires an argument, one of "size" or "color" (or both).
$font_param = [];
if (isset ($args['size'])) {
//TODO: size validation
$font_param['font-size'] = $args['size'];
}
if (isset ($args['color'])) {
//TODO: color validation
$font_param['color'] = $args['color'];
}
//TODO: handle bad settings
if (! empty($font_param)) {
$stack[] = 'font';
// append all css_style params
$css_style = [];
foreach ($font_param as $name=>$value) {
$css_style[] = $name . ': ' . $value;
}
$output = $output . '';
} else {
// Font tag without good args is useless.
$output .= self::encode($match);
}
// SPECIAL TAG HANDLING
} elseif ($name === 'pre') {
// [pre] / [code] put us into RAW mode, where nothing is parsed except [/code]
for ($i = $match_idx + 1; $i < $match_count; $i ++)
{
list($search_match, $search_offset) = $matches[0][$i];
$search_tag = self::decode_tag($search_match);
if (! $search_tag['open'] && $search_tag['name'] === 'pre') { break; }
}
if ($i < $match_count) {
// successfully found ending tag
// encode everything contained between here and there
$output = $output . '' . self::encode(substr($input, $input_ptr, $search_offset - $input_ptr)) . '
';
// advance ptr (again)
$input_ptr = $search_offset + strlen($search_match);
// update search position
$match_idx = $i;
} else {
// Unrecognized type!
$output .= self::encode($match);
}
} elseif ($name === 'md') {
// markdown handling. : [md]title[/md] .
$buffer = null;
$i = $match_idx + 1;
if ($i < $match_count) {
list($search_match, $search_offset) = $matches[0][$i];
$search_tag = self::decode_tag($search_match);
if (! $search_tag['open'] && $search_tag['name'] === 'md') {
$buffer = substr($input, $input_ptr, $search_offset - $input_ptr);
}
}
// matched something in the middle
if (isset($buffer)) {
//var_dump($colorIndex);
$output = $output . ''.$buffer.'
';
// emit the tag
// advance ptr (again)
$input_ptr = $search_offset + strlen($search_match);
// update search position
$match_idx = $i;
} else {
// Unrecognized type!
$output .= self::encode($match);
}
} elseif ($name === 'plist') {
// Problem list handling. modes: [plist=1000,1001,1002]title[/plist].
// Verify enclosing value first.
$buffer = null;
$i = $match_idx + 1;
if ($i < $match_count) {
list($search_match, $search_offset) = $matches[0][$i];
$search_tag = self::decode_tag($search_match);
if (! $search_tag['open'] && $search_tag['name'] === 'plist') {
$buffer = substr($input, $input_ptr, $search_offset - $input_ptr);
}
}
// matched something in the middle
if (isset($buffer)) {
if (isset($args['default'])) {
// $buffer is the title
$url = $args['default'];
} else {
// $buffer is the url
$url = $buffer;
}
if(!isset($colorIndex)) $colorIndex =0;
$plist=html_entity_decode($url);
$pnum= count(explode(",",html_entity_decode($url)));
//var_dump($colorIndex);
// emit the tag 如果希望题单显示2列，修改下面的col-lg-12为col-lg-6
$output = $output . '';
$colorIndex++;
// advance ptr (again)
$input_ptr = $search_offset + strlen($search_match);
// update search position
$match_idx = $i;
} else {
// Unrecognized type!
$output .= self::encode($match);
}
} elseif ($name === 'a') {
// URL handling. Two modes: [a=url]title[/a] and [a]url[/a].
// Verify enclosing value first.
$buffer = null;
$i = $match_idx + 1;
if ($i < $match_count) {
list($search_match, $search_offset) = $matches[0][$i];
$search_tag = self::decode_tag($search_match);
if (! $search_tag['open'] && $search_tag['name'] === 'a') {
$buffer = substr($input, $input_ptr, $search_offset - $input_ptr);
}
}
// matched something in the middle
if (isset($buffer)) {
if (isset($args['default'])) {
// $buffer is the title
$url = $args['default'];
} else {
// $buffer is the url
$url = $buffer;
}
// emit the tag
$output = $output . '' . self::encode($buffer) . '';
// advance ptr (again)
$input_ptr = $search_offset + strlen($search_match);
// update search position
$match_idx = $i;
} else {
// Unrecognized type!
$output .= self::encode($match);
}
} elseif ($name === 'img') {
// image handling. [img (optional=args go=here)]url[/img].
// Verify enclosing value first.
$buffer = null;
$i = $match_idx + 1;
if ($i < $match_count) {
list($search_match, $search_offset) = $matches[0][$i];
$search_tag = self::decode_tag($search_match);
if (! $search_tag['open'] && $search_tag['name'] === 'img') {
$buffer = substr($input, $input_ptr, $search_offset - $input_ptr);
}
}
// matched something in the middle
if (isset($buffer)) {
// Image size adjustment - accepts width and height
$img_param = [];
if (isset ($args['width'])) {
//TODO: size validation
$img_param['width'] = $args['width'];
}
if (isset ($args['height'])) {
//TODO: size validation
$img_param['height'] = $args['height'];
}
//TODO: handle bad settings
// emit the tag
$output = $output . '
$value) {
$output = $output . ' ' . $name . '="' . $value . '"';
}
$output .= '>';
// advance ptr (again)
$input_ptr = $search_offset + strlen($search_match);
// update search position
$match_idx = $i;
} else {
// Unrecognized type!
$output .= self::encode($match);
}
// ADD CUSTOM TAGS HERE
} else {
// Unrecognized type!
$output .= self::encode($match);
}
}
}
// pick up any stray chars and HTML-encode them
$output .= self::encode(substr($input, $input_ptr));
// Close any remaining stray tags left on the stack
while ($stack)
{
$tag = array_pop($stack);
$output = $output . '';
}
return $output;
}
}
function filterDIV($input){
$count1=substr_count($input,"");
// echo $count1."-".$count2."=".($count1-$count2)."
";
if($count1!=$count2){
$value=mb_ereg_replace("<[dD][iI][vV][a-zA-Z -_=\"\']*>","",$input);
$value=mb_ereg_replace("","",$value);
$value=mb_ereg_replace("<([^>]+)<","<\\1<",$value); //fixing 0([^<]+)>",">\\1>",$value); //fixing 7000>m>7000
}else{
$value=$input;
}
return $value;
}
// procedural
function bbcode_to_html($input) : string
{
global $OJ_DIV_FILTER;
if(isset($OJ_DIV_FILTER)&&$OJ_DIV_FILTER) $input=filterDIV($input);
return BBCode::bbcode_to_html($input);
}