当前位置: 首页 > 网络学院 > 服务端脚本教程 > PHP > PHP操作符
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 |
评论 (0) All