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<?php
  if(isset($_POST))// Ö»ÓÐ $_POST ±äÁ¿´æÔÚ£¬²Å´¦Àí.
{
echo $_POST['tel'].' <p>';

}

echo preg_replace("/hi/i","zuoyefeng","HI ,china php")." <br>";
echo preg_replace("/ /i","****","$_POST[tel]");

?>
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$hidden_phone=$_POST['tel'];
$hidden_phone[2]="*";
$hidden_phone[3]="*";
$hidden_phone[4]="*";
$hidden_phone[5]="*";
$hidden_phone[6]="*";
$hidden_phone[8]="*";
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echo preg_replace("/(? <=\d{2})\d{5}/i","*****","12345678963")." <br>";
?>

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<?
echo preg_replace("/(? <=\d{2})\d{6}/i","******","12345678963")." <br>";
?>

ÎÒ¾õµÃ»¹ÊÇsubstrºÃÒ»µã  echo substr($_POST['tel'],3,6);

....Ū´íÁË substr_replace($_POST['tel'],'******',3,6)£»


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if($_SERVER['HTTP_REFERER']!=''){
  @header("Content-type:image/jpeg");
  echo file_get_contents("xlight.jpg");
}
else{
  @header("location:ht ......

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$a = $_FILES['userfile']['name'] ;

$test = $a;

$p = split('/',$test);

$p[count($p)-1];

$content = file_get_contents("$p");

$con ......

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PHP code:
function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
$ckey_length = 4;
$key = md5($key ? $key : UC_KEY);
$keya = md5(substr($key, 0, 16));
$keyb ......
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