PHP操作符笔记

直接复制来的,只是用来方便查询

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
x=6
y=3(x < 10 && y > 1)?返回 true
|| or
x=6
y=3(x==5 || y==5)?返回 false
! not
x=6
y=3!(x==y)返回true

php

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