function แปลง BB code ระหว่าง php กับ html สำเร็จรูป

<?php

function bbcode_format ($str) { 

// $str = htmlentities($str); ภาษาไทยจะเพี้ยน

$str = htmlspecialchars($str);

$simple_search = array( 

//added line break 

'/[br]/is', 

'/[b](.*?)[/b]/is', 

'/[i](.*?)[/i]/is', 

'/[u](.*?)[/u]/is', 

'/[url=(.*?)](.*?)[/url]/is', 

'/[url](.*?)[/url]/is', 

'/[align=(left|center|right)](.*?)[/align]/is', 

'/[img](.*?)[/img]/is', 

'/[mail=(.*?)](.*?)[/mail]/is', 

'/[mail](.*?)[/mail]/is', 

'/[font=(.*?)](.*?)[/font]/is', 

'/[size=(.*?)](.*?)[/size]/is', 

'/[color=(.*?)](.*?)[/color]/is', 

//added textarea for code presentation 

'/[codearea](.*?)[/codearea]/is', 

//added pre class for code presentation 

'/[code](.*?)[/code]/is', 

//added paragraph 

'/[p](.*?)[/p]/is', 

); 

$simple_replace = array( 

//added line break 

'<br />', 

'<strong>$1</strong>', 

'<em>$1</em>', 

'<u>$1</u>', 

// added nofollow to prevent spam 

'<a href="$1" rel="nofollow" title="$2 - $1" target="_blank">$2</a>', 

'<a href="$1" rel="nofollow" title="$1" target="_blank">$1</a>', 

'<div style="text-align: $1;">$2</div>', 

//added alt attribute for validation 

'<img src="$1" alt="" />', 

'<a href="mailto:$1" target="_blank">$2</a>', 

'<a href="mailto:$1" target="_blank">$1</a>', 

'<span style="font-family: $1;">$2</span>', 

'<span style="font-size: $1;">$2</span>', 

'<span style="color: $1;">$2</span>', 

//added textarea for code presentation 

'<textarea class="code_container" rows="30" cols="70">$1</textarea>', 

//added pre class for code presentation 

'<pre class="code">$1</pre>', 

//added paragraph 

'<p>$1</p>', 

); 

// Do simple BBCode's 

$str = preg_replace ($simple_search, $simple_replace, $str); 

// Do <blockquote> BBCode 

$str = bbcode_quote ($str); 

return $str; 

} 

function bbcode_quote ($str) { 

//added div and class for quotes 

$open = '<blockquote><div class="quote">'; 

$close = '</div></blockquote>'; 

// How often is the open tag? 

preg_match_all ('/[quote]/i', $str, $matches); 

$opentags = count($matches['0']); 

// How often is the close tag? 

preg_match_all ('/[/quote]/i', $str, $matches); 

$closetags = count($matches['0']); 

// Check how many tags have been unclosed 

// And add the unclosing tag at the end of the message 

$unclosed = $opentags - $closetags; 

for ($i = 0; $i < $unclosed; $i++) { 

$str .= '</div></blockquote>'; 

} 

// Do replacement 

$str = str_replace ('[' . 'quote]', $open, $str); 

$str = str_replace ('[/' . 'quote]', $close, $str); 

return $str; 

}

//ตัวอย่างการนำไปใช้งาน

$a="[url=http://www.pyayam.com]http://www.pyayam.com[/url]";

echo bbcode_format($a);

?>