［PHP］htmlentities 跟 htmlspecialchars 的區別
htmlentities - Convert all applicable characters to HTML entities. - [ Manual ] htmlspecialchars - Convert special characters to HTML entities. - The translations performed are: '&' (ampersand) becomes '&' '"' (double quote) becomes '"' when ENT_NOQUOTES is not set. "'" (single quote) becomes ''' (or ') only when ENT_QUOTES is set. '<' (less than) becomes '<' '>' (greater than) becomes '>' - [ Manual ]