php - Using empty over == "" -
It has come to my attention that by using (empty ($ var)) { It is not as efficient as most people think instead of using empty () if I am using ($ Var == "") {{/ Code> Because if the text box / input is a white space, it is not empty .. while using white at white locations using == "" Is not taken care of, so if any white spot and cave If there is a white spot, then my second example is more for PHP documentation The following things are considered empty: "(an empty string) 0 (0 as an integer) 0.0 (0 as a float)" 0 "(As a string) Null Falls array () (an empty array) $ var; (A variable has been declared, but without any value) It seems that you are just checking that there is a non-existent The black color is the character and therefore it should work: if (stroken ($ var) == 0)