Difference between daddslashes () and saddslashes () in php-php Tutorial

Differences between daddslashes () and saddslashes () in php

// ---- Saddslashes Function daddslashes ($ string, $ force = 0, $ strip = FALSE ){ // Whether to forcibly remove strings or arrays // If the magic reference is not enabled or $ force is not 0 If (! MAGIC_QUOTES_GPC | $ force ){ If (is_array ($ string) {// if it is an array, this function is executed cyclically. Foreach ($ string as $ key => $ val ){ $ String [$ key] = daddslashes ($ val, $ force ); } } Else { // If magic reference is enabled 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 and escape it as $ _ GET, $ _ POST, $ _ COOKIE and $ _ REQUEST arrays contain the values of the first three arrays. // Here, why do we remove the backslash and escape the $ string first, because sometimes $ string may have two backslashes, and stripslashes filters out unnecessary 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, recursively escape the values in the array Foreach ($ string as $ key => $ val ){ $ String [$ key] = saddslashes ($ val ); } } Else { $ String = addslashes ($ string); // Escape single quotation marks ('), double quotation marks ("), backslash (\), and NUL (NULL character) } Return $ string; } Else { Return $ string; } ?> Note: saddslashes can escape each data: Function saddslashes ($ string ){ If (is_array ($ string )){ Foreach ($ string as $ key => $ val ){ $ String [$ key] = saddslashes ($ val ); } } Else { $ String = addslashes ($ string ); } Return $ string; } ?>