Can I say if(4 < $a < 44) instead of if(4 < $a && $a < 44)? (php)

Question

Can I use if(4 <= $a <= 44) instead of if(4 <= $a && $a <= 44)?

Answer 1

No, you can't. 

if(4 <= $a <= 44) will (I believe) be parsed as if ((4 <= $a) <= 44), which checks whether (4 <= $a) (which is either 0 or 1) is less than 44.

Answer 2

No, you can't do that.

if(4 <= $a <= 44) is equivalent to if((4 <= $a) <= 44). This may be equivalent to if(false <= 44) or if(true <= 44), neither of which makes sense.

Answer 3

No

Answer 4

No, you can't (as all others already said).

Comparison operators in PHP, as their name implies, allow you to compare two values, and with the expression

4 <= $a <= 44

you would be comparing three values. Read here for a complete explanation.