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PHP运算符之PHP基本入门教程

WBOY
WBOYOriginal
2016-05-25 16:48:40975browse

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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