The difference between daddslashes() and saddslashes() in php

//----saddslashes
function daddslashes($string, $force = 0, $strip = FALSE) {
//Is the string or array forced? Remove
//If magic reference is not turned on or $force is not 0
if(!MAGIC_QUOTES_GPC || $force) {
if(is_array($string)) { //If it is an array, loop this function
foreach ($string as $key => $val) {
$string[$key] = daddslashes($val, $force);
}
} else {
//If magic references are on or $force is 0
/ /The following is a ternary operator. If $strip is true, execute stripslashes to remove the backslash character, and then execute addslashes
//$strip is true, that is, remove the backslash character first and then escape it as $ _GET, $_POST, $_COOKIE and $_REQUEST The $_REQUEST array contains the values ​​​​of the first three arrays
//Why do we need to remove the backslash and then escape the $string here, because sometimes $string may have Two backslashes, stripslashes filters out excess backslashes
　 $string = addslashes($strip ? stripslashes($string) : $string);
}
}
return $string;
}
//------saddslashes
function saddslashes($string) { if(!MAGIC_QUOTES_GPC){
if(is_array($string)) { //If the escape is an array, then the array Recursively escape the value in
　　　foreach($string as $key => $val) {
　　　$string[$key] = saddslashes($val);
　　　}
} else {
　　$string = addslashes($string ); //Escape single quotes ('), double quotes ("), backslashes () and NUL (NULL characters)
}
return $string;
}else{
return $string;
}
?>

The key point is: saddslashes can escape every data:

function saddslashes($string) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = saddslashes($val);
}
} else {
$string = addslashes($string);
}
return $string;
}
?>