Ask a retarded question.

How to judge the empty as long as there is no content to return True


$STR = 0;
!empty ($STR); I can't.


$STR = 0;
$str! = "; I can't.


$str = ";
Isset ($STR); Or not.

How can you let them not think of 0 as empty?

The result I want is that as long as the content is not empty, regardless of 0 not 0

Reply to discussion (solution)

Strlen ($STR) ===0

Try TypeOf Var_dump.

Strlen ($STR) ===0
Take the length of the three equals sign and learn a hand

Empty ($STR) is it OK? Why do you want to reverse?

Strlen ($STR) ===0

The first empty (0) PHP Take this seriously, the second $str!== ' ' This is OK, isset () is to determine that the variable is not present, you set an empty variable is also a variable AH.

Empty can.

Look at this article, the overall is quite comprehensive.
http://blog.csdn.net/timecolor/article/details/8762930

