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<8 returns true |
| >= |
is greater than or equal to |
5>=8 returns false |
| <= |
is less than or equal to |
5<=8 returns true |
logical operators
operatordescriptionexample
| && |
and |
x=6 y=3 (x < 10 && y > 1) returns true
|
|
or |
x=6 y=3 (x==5 y==5) returns false
|
| ! |
not |
x=6 y=3 !(x==y) returns true
|
本文連結http://www.cxybl.com/html/wlbc/Php/20120531/27128.html