Smarty Plugin for shielding email address

For the use of, think such display work, or to the template class is more appropriate. Work to use, feel such a display work, or to the template class is more appropriate.   So write a plugin like this. <?php
/**
* Smarty Plugin
* @package Smarty
* @subpackage Plugins
*/ /**
* Smarty Email_mask modifier plugin
*
* type:modifier<br>
* name:email_mask<br>
* Purpose:mask part of Email<br>
* input:<br>
*-String:input Email
*-Part:mask part [default '] Unit:percent
*-Position:mask position [default ' center '] (left, center, right)
*-Maskstring:mask string [default ' * ']
*
* @author wendaming <wendaming at comsenz Dot com>
* @param string
* @param integer
* @param string
* @param string
* @return Stringvoid
* * Function Smarty_modifier_email_mask ($string, $maskPart =, $position = ' center ', $maskString = ' * ') {
$emailName = substr ($string, 0, Strpos ($string, ' @ '));
$emailLen = strlen ($emailName);
$maskNum = Floor ($emailLen * $maskPart/100);
$maskName = '; if ($position = = ' Center ') {
$beginMask = Floor (($emailLen-$maskNum)/2);
} elseif ($position = = ' Left ') {
$beginMask = 0;
} else {
$beginMask = $emailLen-$maskNum;
} $count = 0;
for ($i = 0; $i < $emailLen; + + $i) {
if ($i >= $beginMask && $count < $maskNum) {
$maskName. = $maskString;
+ + $count;
} else {
$maskName. = $emailName {$i};
}
Return Str_replace ($emailName. ' @ ', $maskName. ' @ ', $string);
}