$a

";//Output value 1 var_dump($a);//Type of data that can be output: int (1)?>"> Example explanation of PHP operators-PHP Tutorial-php.cn

Example explanation of PHP operators

巴扎黑
Release: 2023-03-14 18:20:02
Original
1881 people have browsed it

1. Arithmetic operators:
%: Modulo operation (remainder operation)
/: Division operation (the result is the value of the quotient)
Note: The divisors of the above two operations cannot be 0. In PHP language, the operands on both sides of % will be converted to integers before the operation.
Example:


$a

";//输出数值1 var_dump($a);//可以输出数据的类型:int(1)?>
Copy after login



##2. String operatorin PHP There is only one string operator in English, which is the English period (.), also known as the connection operator
If you are connecting a variable, you need to add (.) on both sides of the variable and add "" on the outside
Example:


我的名字:".$name.",

我来自".$adress."。

"."
今年$age.岁"; ?>
Copy after login

3. Assignment operator: Operate the value on the left and your value on the right and assign it to the left.=

## 4. Comparison operators: Denta computers


# This, "==", "===" the differences" =”: It is an assignment symbol“==”: It is an equal sign. When the operand on the left is equal to the operand on the right, TRUE is returned, otherwise it returns FALSE“===”: When the operand on the left The operands are the same as the operands on the right, and their data types are also the same before TRUE







5. Logical operators: used to determine right or wrong
and or &&: TRUE is returned only when the operands on both sides are TRUEor or ||: operands on both sides When it is FASE, it returns FALSEnot or!: When the operand is TRUE, it returns FALSExor: Logical AND or operation, as long as one side of the operand is TRUE, it can return TRUE




6. Bit operators:


&: Two 1s are 1;|: Two 0s are 0;^ : When the two operands are different, it is 1Example:




我的名字:".$name.",

我来自".$adress."。

"."
今年$age.岁"; ?>
Copy after login


7.三元运算符:(exprl)?(exprl1):(exprl2)类似与 “if...else”,但是三元运算符会显得更加的整洁
当experl的值为TRUE时,获取exprl1 的值,反之 取exprl2的值


8.执行运算符 :反引号‘ ’
PHP将尝试将引号的内容作为操作系统命令来执行,并将其输出信息返回


9.错误输出控制符号:@
将其放在一个PHP表达式之前,产生的任何警告信息都将被忽略,它只对表达式有效。

规则:如果能从某处取到值,就可以在它的前面加上@。不能放在函数和类的定义之前。

10.运算符的优先级

优 先 级 结合方向 运 算 符 附加信息
1 非结合 new new
2 左 [ array()
3 非结合 ++ -- 递增/递减运算符
4 非结合 ! ~ - (int) (float) (string) (array) (object) @ 类型
5 左 * / % 算数运算符
6 左 + - . 算数运算符和字符串运算符
7 左 << >> 位运算符
8 非结合 < <= > >= 比较运算符
9 非结合 == != === !== 比较运算符
10 左 & 位运算符和引用
11 左 ^ 位运算符
12 左 | 位运算符
13 左 && 逻辑运算符
14 左 || 逻辑运算符
15 左 ? : 三元运算符
16 右 = += -= *= /= .= %= &= |= ^= <<= >>= 赋值运算符
17 左 and 逻辑运算符
18 左 xor 逻辑运算符
19 左 or 逻辑运算符
20 左 , 多处用到

The above is the detailed content of Example explanation of PHP operators. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!