php smarty函数扩展的简单示例

这篇文章主要为大家详细介绍了php smarty函数扩展的简单示例，具有一定的参考价值，可以用来参考一下。

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代码如下:

 
function smarty_modifier_cn_truncate($string, $strlen = 20, $etc = '...', 
$keep_first_style = false) 
{ 
$strlen = $strlen*2; 
$string = trim($string); 
if ( strlen($string) <= $strlen ) { 
return $string; 
} 
$str = strip_tags($string); 
$j = 0; 
for($i=0;$i<$strlen;$i++) { 
if(ord(substr($str,$i,1))>0xa0) $j++; 
} 
if($j%2!=0) $strlen++; 
$rstr=substr($str,0,$strlen); 
if (strlen($str)>$strlen ) {$rstr .= $etc;} 
if ( $keep_first_style == true && ereg('^<(.*)>$',$string) ) { 
if ( strlen($str) <= $strlen ) { 
return $string; 
} 
$start_pos = strpos($string,substr($str,0,4)); 
$end_pos = strpos($string,substr($str,-4)); 
$end_pos = $end_pos+4; 
$rstr = substr($string,0,$start_pos) . $rstr . substr($string,$end_pos,strlen($string)); 
} 
return $rstr; 
} 

代码如下:

 
<?php 
function smarty_modifier_ubb($str) { 
$ubbs['quote'][0] = '/\[quote\](.*?)\[\/quote\]/s'; 
$ubbs['quote'][1] = '<blockquote>引用:<hr size=1>\1<hr size=1></blockquote>'; 
$ubbs['b'][0] = '/\[b\](.*?)\[\/b\]/s'; 
$ubbs['b'][1] = '<b>\1</b>'; 
$ubbs['i'][0] = '/\[i\](.*?)\[\/i\]/s'; 
$ubbs['i'][1] = '<i>\1</i>'; 
$ubbs['u'][0] = '/\[u\](.*?)\[\/u\]/s'; 
$ubbs['u'][1] = '<u>\1</u>'; 
$ubbs['li'][0] = '/\[li\](.*?)\[\/li\]/s'; 
$ubbs['li'][1] = '<li>\1</li>'; 
$ubbs['img'][0] = '/\[img\](.*?)\[\/img\]/s'; 
$ubbs['img'][1] = '<img border="0" src="\1">'; 
$ubbs['img2'][0] = '/\[img=([^,]+),([^\]]+)\](.*?)\[\/img\]/s'; 
$ubbs['img2'][1] = '<img border="0" width="\1" height="\2" src="\3">'; 
$ubbs['url'][0] = '/\[url\](.*?)\[\/url\]/s'; 
$ubbs['url'][1] = '<a href="\1" target="_blank">\1</a>'; 
$ubbs['url2'][0] = '/\[url=([^\]]+)\](.*?)\[\/url\]/s'; 
$ubbs['url2'][1] = '<a href="\1" target="_blank">\2</a>'; 
$ubbs['email'][0] = '/\[email=([^\]]+)\](.*?)\[\/email\]/s'; 
$ubbs['email'][1] = '<a href="mailto:\2">\2</a>'; 
$ubbs['qq'][0] = '/\[qq\]([0-9]{5,10})\[\/qq\]/s'; 
$ubbs['qq'][1] = '<a target="new" href="tencent://message/?uin=\1&Site=www.52515.net&Menu=yes"><img border="0" src="http://wpa.qq.com/pa?p=1:\1:\1" alt="点击这里给我发消息"></a>'; 
$ubbs['color'][0] = '/\[color=([^\]]+)\](.*?)\[\/color\]/s'; 
$ubbs['color'][1] = '<font color="\1">\2'; 
$ubbs['font'][0] = '/\[font=([^\]]+)\](.*?)\[\/font\]/s'; 
$ubbs['font'][1] = '<font face="\1">\2'; 
$ubbs['size'][0] = '/\[size=([0-9]+)\](.*?)\[\/size\]/s'; 
$ubbs['size'][1] = '<font size="\1"　style="line-height:\1em;">\2'; 
$ubbs['sizept'][0] = '/\[size=([0-9,pt]+)\](.*?)\[\/size\]/s'; 
$ubbs['sizept'][1] = '<font style="font-size:\1">\2'; 
$ubbs['align'][0] = '/\[align=([^\]]+)\](.*?)\[\/align\]/s'; 
$ubbs['align'][1] = '<div align="\1">\2'; 
$ubbs['media'][0] = '/\[media\](.*?)\[\/media\]/s'; 
$ubbs['media'][1] = '<embed src="\1"></embed>'; 
$ubbs['list'][0] = '/\[list\](.*?)\[\/list\]/s'; 
$ubbs['list'][1] = '<ul>\1</ul>'; 
$ubbs['list2'][0] = '/\[list=([0-9]+)\](.*?)\[\/list\]/s'; 
$ubbs['list2'][1] = '<ol>\2</ol>'; 
$ubbs['indent'][0] = '/\[indent\](.*?)\[\/indent\]/s'; 
$ubbs['indent'][1] = '<div style="text-indent: 20px;">\1'; 
$ubbs['table'][0] = '/\[table([=,0-9,%]*)\](.*?)\[\/table\]/s'; 
$ubbs['table'][1] = '<table style="border:#0099FF 1px dotted;border-right-width:0px; border-top-width:0px;">\2'; 
$ubbs['tr'][0] = '/\[tr\](.*?)\[\/tr\]/s'; 
$ubbs['tr'][1] = '<tr>\1'; 
$ubbs['td'][0] = '/\[td\](.*?)\[\/td\]/s'; 
$ubbs['td'][1] = '<td style="border:#0099FF 1px dotted; border-left-width:0px; border-bottom-width:0px;">&nbsp;\1'; 
$ubbs['td2'][0] = '/\[td([^(\]|\[)]+)\](.*?)\[\/td\]/s'; 
$ubbs['td2'][1] = '<td style="border:#0099FF 1px dotted; border-left-width:0px; border-bottom-width:0px;">&nbsp;\2'; 
$str = str_replace('[*]','<li>',$str); 
foreach ($ubbs as $ubb){ 
$str = ubb_replace($ubb[0],$ubb[1],$str); 
} 
return $str; 
} 
function ubb_replace($pattern,$replacement,$str){ 
do { 
$str_ret = $str; 
$str = preg_replace($pattern,$replacement,$str); 
}while($$str); 
return $str_ret; 
} 
?> 

代码如下:

 
function smarty_modifier_unescape($str) 
{ 
$str = rawurldecode($str); 
preg_match_all("/(?:%u.{4})|[^%]+/",$str,$r); 
$ar = $r[0]; 
foreach($ar as $k=>$v) { 
if(substr($v,0,2) == "%u" && strlen($v) == 6) 
$ar[$k] = iconv("UCS-2","GB2312",@pack("H4",substr($v,-4))); 
} 
return join("",$ar); 
} 

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