PHP character filtering method_PHP tutorial

/**
*Character filter
* $santype 1: Strip HTML, XML and PHP tags,
* 2: Strip HTML, XML and PHP tags, convert characters into HTML entities, encode double quotes and single quotes
* 3: Strip HTML, XML and PHP tags, add backslash before specified predefined characters Single quote (') Double quote (") Backslash () NULL
* 4: Used to clean data retrieved from databases or HTML forms (stripping HTML, XML and PHP tags)
* 6: Add a backslash before the specified predefined character Single quote (') Double quote (") Backslash () NULL
*
**/
  
 function sanitize($var, $santype = 1, $allowable_tags = ''){
  if ($santype == 1) {return strip_tags($var, $allowable_tags = '');}
  elseif ($santype == 2) {return htmlentities(strip_tags($var, $allowable_tags),ENT_QUOTES,'UTF-8');}
  elseif ($santype == 3) {
     return addslashes(strip_tags($var, $allowable_tags));
  }
  elseif ($santype == 4) {
     return stripslashes(preg_replace('/<([^>]+)>/es', "'<'.sanitize('\1',5).'>'",strip_tags($var, $allowable_tags)));
  }
  elseif ($santype == 5) {
   return preg_replace('/sonw+s*=/is','',$var);
  }
  elseif ($santype == 6 ){
   return addslashes($var);
  }
 } 
 
摘自 adamboy

http://www.bkjia.com/PHPjc/478337.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/478337.htmlTechArticle/** * 字符过滤 * $santype 1 : 剥去 HTML、XML 以及 PHP 的标签, * 2 : 剥去 HTML、XML 以及 PHP 的标签,字符转换为 HTML 实体 , 编码双引号和单引号 * 3...