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Operators are used to operate on values.
操作符(Operator)是用来对一个值进行操作的。
This section lists the different operators used in PHP.
下面的列表罗列了PHP中不同的操作符,以及它们不同的用法:
Arithmetic Operators
运算符(Arithmetic Operators)
| Operator 符号 |
Description 描述 |
Example 案例 |
Result 结果 |
|---|---|---|---|
| + | Addition 加号 |
x=2 x+2 |
4 |
| - | Subtraction 减号 |
x=2 5-x |
3 |
| * | Multiplication 乘号 |
x=4 x*5 |
20 |
| / | Division 除号 |
15/5 5/2 |
3 2.5 |
| % | Modulus (division remainder) 求模(余数) |
5%2 10%8 10%2 |
1 2 0 |
| ++ | Increment 自加 |
x=5 x++ |
x=6 |
| -- | Decrement 自减 |
x=5 x-- |
x=4 |
Assignment Operators
分配符(Assignment Operators)
| Operator 符号 |
Example 案例 |
Is The Same As 等同于 |
|---|---|---|
| = | 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 |
Comparison Operators
比较符(Comparison Operators)
| Operator 符号 |
Description 具体描述 |
Example 案例 |
|---|---|---|
| == | is equal to 等于 |
5==8 返回 false |
| != | is not equal 不等于 |
5!=8 返回 true |
| > | is greater than 大于 |
5>8 返回 false |
| < | is less than 小于 |
5<8 返回 true |
| >= | is greater than or equal to 大于等于 |
5>=8 返回 false |
| <= | is less than or equal to 小于等于 |
5<=8 返回 true |
Logical Operators
逻辑判断符(Logical Operators)
| Operator 符号 |
Description 描述 |
Example 案例 |
|---|---|---|
| && | and 与 |
x=6 y=3 (x < 10 && y > 1) 返回 true |
| || | or 或 |
x=6 y=3 (x==5 || y==5) 返回 false |
| ! | not 非 |
x=6 y=3 !(x==y)返回true |
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