php各种过滤字符函数
复制代码 代码如下:
','>',$string);
    $string = str_replace({,'',$string);
    $string = str_replace('}','',$string);
    $string = str_replace('','',$string);
    return $string;
    }
    ?>
    $val) $string[$key] = new_addslashes($val);
    return $string;
    }
    ?>
-1) ? $safestep : 1;
    if($safestep == 1){
    $str = preg_replace(#script:#i, ｓｃｒｉｐｔ：, $str);
    $str = preg_replace(#]*>#isu, '', $str);
    $str = preg_replace(#[ ]{1,}#, ' ', $str);
    return $str;
    }else if($safestep == 2){
    $str = addslashes(htmlspecialchars(stripslashes($str)));
    $str = preg_replace(#eval#i, 'ｅｖａｌ', $str);
    $str = preg_replace(#union#i, 'ｕｎｉｏｎ', $str);
    $str = preg_replace(#concat#i, 'ｃｏｎｃａｔ', $str);
    $str = preg_replace(#--#, '－－', $str);
    $str = preg_replace(#[ ]{1,}#, ' ', $str);
    return $str;
    }else{
    return $str;
    }
    }
    ?>
/','',$text);
           //完全过滤js
           $text = preg_replace('/
0) {
                       $pattern .= '(';
                       $pattern .= '([xx]0{0,8}([9ab]);)';
                       $pattern .= '|';
                       $pattern .= '|({0,8}([9|10|13]);)';
                       $pattern .= ')*';
                   }
                   $pattern .= $ra[$i][$j];
               }
               $pattern .= '/i';
               $replacement = substr($ra[$i], 0, 2).''.substr($ra[$i], 2); // add in to nerf the tag
               $val = preg_replace($pattern, $replacement, $val); // filter out the hex tags
               if ($val_before == $val) {
                   // no replacements were made, so exit the loop
                   $found = false;
               }
           }
       }
       return $val;
    }
    ?>
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