php - Preg_replace returning empty post - 


$input = array(     '@\[(?i)br\](.*?)@si',     '@\[(?i)b\](.*?)\[/(?i)b\]@si',     '@\[(?i)i\](.*?)\[/(?i)i\]@si',     '@\[(?i)u\](.*?)\[/(?i)u\]@si',     '@\[(?i)img\](.*?)\[/(?i)img\]@si',     '@\[(?i)code\](.*?)\[/(?i)code\]@si',     '@\[(?i)s\](.*?)\[/(?i)s\]@si',     '@\[(?i)webs=(.*?)\](.*?)\[/(?i)webs\]@si',     '~\[(?i)color=(.*?)\](.*?)\[/(?i)color\]~s',     '@\[(?i)h1\](.*?)\[/(?i)h1\]@si',     '@\[(?i)h2\](.*?)\[/(?i)h2\]@si',     '@\[(?i)h3\](.*?)\[/(?i)h3\]@si',     '@\[(?i)h4\](.*?)\[/(?i)h4\]@si',     '@\[(?i)h5\](.*?)\[/(?i)h5\]@si',     '@\[(?i)h6\](.*?)\[/(?i)h6\]@si',     '@\[(?i)ul\](.*?)\[/(?i)ul\]@si',     '@\[(?i)ol\](.*?)\[/(?i)ol\]@si',     '@\[(?i)quote\](.*?)\[/(?i)quote\]@si',     '@\[(?i)a\](.*?)\[/(?i)a\]@si',     '~\[(?i)bcolor=(.*?)\](.*?)\[/bcolor\]~s',     '~\[(?i)t=(.*?):c=(.*?):p=(.*?):w=(.*?):s=(.*?)\](.*?)\[/t\]~s',     '@\[(?i)tr\](.*?)\[/(?i)tr\]@si',     '@\[(?i)td\](.*?)\[/(?i)td\]@si',     '~\[(?i)span=(.*?):c=(.*?)\](.*?)\[/span\]~s',     '~\[(?i)pre\](.*?)\[/pre\]~s' );  $output = array(     '<br/>',     '<b>\\1</b>',     '<i>\\1</i>',     '<u>\\1</u>',     '<img src="\\1">',     '<code>\\1</code>',     '<s>\\1</s>',     '<a href="\\1">\\2</a>',     '<span style="color:$1;">$2</span>',     '<h1>\\1</h1>',     '<h2>\\1</h2>',     '<h3>\\1<h3>',     '<h4>\\1</h4>',     '<h5>\\1</h5>',     '<h6>\\1</h6>',     '<ul>\\1</ul>',     '<ol>\\1</ol>',     '<quote>\\1</quote>',     '<a>\\1</a>',     '<span style="background-color:\\1;">\\2</span>',     '<table border="\\1"cellspacing="\\2"cellpadding="\\3"width="\\4"style="background-color:\\5;">\\6</table>',     '<tr>\\1</tr>',     '<td>\\1</td>',     '<span style="background-color:\\1;color:\\2;">\\3</span>',     '<pre>\\1</pre>' );  $post="[b]i love stackoverflow[/b]";  echo preg_replace($input,$output,$post);

the code working fine before, code returning empty string. read preg_replace deprecated, how use preg_replace_callback code? thanks.


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