Function to filter html code under PHP to improve program security_PHP tutorial

The following is a function for filtering HTML code:

Copy code The code is as follows:

function ihtmlspecialchars($string) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = ihtmlspecialchars($val);
}
} else {
$string = preg_replace('/&((#(d{3,5}|x[a-fA-F0-9]{4})|[a-zA-Z][a-z0 -9]{2,5});)/', '&\1',
str_replace(array('&', '"', '<', '>'), array('& ', '"', '<', '>'), $string));
}
return $string;
}

php Below is the function to filter HTML code

Copy code The code is as follows:

function htmlEncode($string) {
$string =trim($string);
$string=str_replace("&","&",$string);
$string=str_replace("'","'",$string);
$string=str_replace("&","&",$string);
$string=str_replace(""",""",$string);
$string=str_replace("""," "",$string);
$string=str_replace("<","<",$string);
$string=str_replace("<","<",$string) ;
$string=str_replace(">",">",$string);
$string=str_replace(">",">",$string);
$string =str_replace(" "," ",$string);
$string=nl2br($string);
return $string;
}

http://www.bkjia.com/PHPjc/321398.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/321398.htmlTechArticleThe following is the function for filtering HTML code: Copy the code as follows: function ihtmlspecialchars($string) { if(is_array( $string)) { foreach($string as $key = $val) { $string[$key] = ihtm...