php operatorsthis section lists the different operators used in php.
arithmetic operators
operatordescriptionexampleresult
+ addition x=2
x+2 4
- subtraction x=2
5-x 3
* multiplication x=4
x*5 20
/ division 15/5
5/2 3
2.5
% modulus (division remainder) 5%2
10%8
10%2 1
2
0
++ increment x=5
x++ x=6
-- decrement x=5
x-- x=4
assignment operators
operatorexampleis the same as
= x=y x=y
+= x+=y x=x+y
-= x-=y x=x-y
*= x*=y x=x*y
/= x/=y x=x/y
.= x.=y x=x.y
%= x%=y x=x%y
comparison operators
operatordescriptionexample
== is equal to 5==8 returns false
!= is not equal 5!=8 returns true
> is greater than 5>8 returns false
is less than 5
>= is greater than or equal to 5>=8 returns false
is less than or equal to 5
logical operators
operatordescriptionexample
&& and x=6
y=3 (x 1) returns true
or x=6
y=3 (x==5 y==5) returns false
! not x=6
y=3 !(x==y) returns true
本文链接http://www.cxybl.com/html/wlbc/php/20120531/27128.html