...monstrous 300 line parser.
A lot of the "debugging" variables are still there, so expect a massive code cleanup soon. :)
PHP Code:
<?php
//Parser power!
if(!isset($_REQUEST['bbsubmit']))
{
echo "
<html>
<head>
<title>SimpleBB\Tests\BBCode</title>
</head>
<body style=\"font-family:Tahoma; background-color: grey; color:white;\">
<div style=\"text-align: center;\">
<p onclick=\"window.location='#DOCS'\">SimpleBB BBCode Parser ALPHA Scroll down or click for some documentation!</p><br />
<br />
<form method=\"post\" action=\"\">
<textarea cols=\"50\" rows=\"10\" style=\"margin-left:auto; margin-right:auto;\" name=\"bbcode\">sample[b]hello[i]recursive[b]test[/b][/i][/b][long]test[/long][i]hello[/b]
</textarea>
<br />
<input type=\"submit\" name=\"bbsubmit\" value=\"Parse It! (ALT+P)\" accesskey=\"p\"/>
</form>
<br />
<br />
<br />
<br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br />
<strong>ParserDOC</strong><br />
<br />
<a name=\"DOCS\"></a>
8.28.10 - Started on parser. Parser can detect unfinished <strong>first-level</strong> bbcode. Recursive checking is not done yet.<br />
8.29.10 - Recursive parsing just about done. There may still be bugs though...next up: Tag fixing.<br />
8.31.10 - Parser is pretty much done. (Most) Bugs have been fixed.
</div>
</body>
</html>
";
}
else
{
$codes = array(
'b' => array(
'handler' => 'simplebb_parse_bold'
),
'i' => array(
'handler' => 'simplebb_parse_italics'
),
'u' => array(
'handler' => 'simplebb_parse_underline'
)
);
$text = $_REQUEST['bbcode'];
$text = nl2br($text, true);
echo "<pre>";
echo "<p onclick=\"window.location='bbcode.php';\" style=\"color:blue;\">Click here to go back.</p>";
echo "<br />";
echo "The text " . $text . "generated...<br /><br />";
function test($text, $isrecursive=false)
{
//We want to "globalize" our code array
global $codes;
$pos = 0;
//Syntax tree--initialize it to an empty array
$tree = array();
//What offset are we at?
$offset = 0;
$id = 1;
$error = 0;
$textstart = 0;
$prevbegin = 0;
$prevend = -1;
//Loop...
while(1)
{
//Initialize our found variable to false
$found = false;
//Search for a tag!
$begin = stripos($text, "[", $offset);
$end = stripos($text, "]", $begin);
//Didn't find anything?
if($begin === false || $end === false)
{
//Since there's no bbcode, exit the loop.
break;
}
//In that case, let's set our offset as the closing bracket
$offset = $end;
//What tag are we dealing with?
$bbtag = substr($text, $begin+1, $end-$begin-1);
foreach($codes as $key => $value)
{
//Does this tag even exist?
if(strcmp($bbtag, $key) == 0)
{
//Ok, good, I was starting to get worried. :P
$found = true;
}
}
//Now look for the end tag.
//Was it a valid tag?
if(!$found)
{
//It wasn't a tag?
continue;
}
else
{
//Add the text to the array...
//$tree["text".$id] = substr($text, $offset-$begin-2, $begin);
//$id++;
//Open and end brackets for the closing tag
$begin_ = stripos($text, "[/".$bbtag, $offset);
$end_ = stripos($text, "]", $begin_);
//Not found?
if(!$begin_ || !$end_)
{
//We have an error!
$error++;
continue;
}
$length = $begin-$prevend-1;
$textbefore = substr($text, $textstart, $length);
if(empty($textbefore))
{}
//Push any text before the bbcode onto the array...
else
array_push($tree, array("", $textbefore, array()));
$textstart = $end_+1;
$offset = $end_;
$endbbtag = substr($text, $begin_+1, $end_-$begin_-1);//We want to skip the [
//Are they the same?
if($endbbtag == "/" . $bbtag)
{
//Yes! Now we can process the text inside!
$intags = substr($text, $end+1, $begin_-$end-1);
$original = $intags;
$multiple = false;
//Search for repeating tags
/*while(1)
{
$multipletags = stripos($intags, "[".$bbtag."]");
if($multipletags === false)
break;
else
{
$multiple = $multipletags;
for($i = strlen($bbtag)+1; $i >= 0; $i--)
{
$intags[$multipletags+$i] = "";
}
}
}*/
//Children trees...
$children = array();
//Recursive--find any tags with in children, and find any tags within those, and within those, and within...
$children = test($intags, true);
//Push the whole thing on...
array_push($tree, array($bbtag, $intags, $children));
}
else
{ }
$prevbegin = $begin;
$prevend = $end_;
}
}
//Anymore text?
$lasttext = substr($text, $textstart);
if($isrecursive)
{}
else
{
if(empty($lasttext))
{ }
else
{
array_push($tree, array("", $lasttext, array()));
}
}
//if($error)
//return $error;
//Check for empt
//EVRY'THING MUST GOETH!
return $tree;
}
function simplebb_parse_bold($text)
{
return "<span style=\"font-weight:bold;\">".$text."</span>";
}
function simplebb_parse_italics($text)
{
return "<span style=\"font-style:italic;\">".$text."</span>";
}
function simplebb_parse_underline($text)
{
return "<span style=\"text-decoration:underline;\">".$text."</span>";
}
//NOTE: This assumes that the tag exists!!!
function GenerateText($textarray)
{
global $codes;
if(!is_array($textarray))
return "";
$output = array();
$tag = $textarray[0];
$wrapped = $textarray[1];
$children = $textarray[2];
//It's plain text
if($tag == "")
{
return $wrapped;
}
$recursive = array();
if(count($children) > 0)
{
//This needs to be fixed...
foreach($children AS $child)
{
$recursive_ = GenerateText($child);
array_push($recursive, $recursive_);
}
}
foreach($recursive AS $rec)
{
if(!empty($rec[0]))
{
$toreplace = "[".$rec[0]."]".$rec[1]."[/".$rec[0]."]";
$wrapped = str_ireplace($toreplace, $rec[2], $wrapped);
}
}
$handler = $codes[$tag]["handler"];
$output[0] = $tag;
$output[1] = $wrapped;
$output[2] = call_user_func($handler, $wrapped, array(), array());
return $output;
}
function GenerateFromTree($tree)
{
if(!is_array($tree))
return "";
//This is it!
$output = "";
foreach($tree AS $part)
{
if(!is_array($part))
return "";
$output_ = GenerateText($part);
//Some weird bug happens here...probably just a code problem :P
if(isset($output_[2]))
{
if(is_array($output_))
$output .= $output_[2];
else
$output .= $output_;
}
}
return $output;
}
$bbcodetree = test($text);
print_r($bbcodetree);
$out = GenerateFromTree($bbcodetree);
echo $out;
echo "</pre>";
echo "<p onclick=\"window.location='bbcode.php';\" style=\"color:blue;\">Click here to go back.</p>";
}
?>
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