PHP运算符之PHP基本入门教程
运算符是任何一门开发语言中会用到的基本内容,下面我来介绍PHP运算符的一些基础知识与使用方法.
运算符用于对值进行运算.
PHP 运算符
本部分列出了在 PHP 中使用的各种运算符:
算数运算符
运算符 | 说明 | 例子 | 结果 |
---|---|---|---|
+ | 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 |
赋值运算符
运算符 | 说明 | 例子 |
---|---|---|
= | 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 |
比较运算符
运算符 | 说明 | 例子 |
---|---|---|
== | 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 |
逻辑运算符
运算符 | 说明 | 例子 |
---|---|---|
&& | 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 |
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