


php method to implement addition, subtraction, multiplication and division: 1. Create a php sample file; 2. Define two variables as "$x" and "$y"; 3. Through "$x $y", "$x-$y", "$x*$y" and "$x/$y" formulas implement addition, subtraction, multiplication and division operations; 4. Use "echo" to output the operation results.
This tutorial operating system: Windows 10 system, PHP8.1 version, Dell G3 computer
How to implement addition, subtraction, multiplication and division in php Operation?
In PHP, operators are divided into: arithmetic operators, logical operators, ternary operators and bitwise operators.
We can implement addition, subtraction, multiplication and division operations through arithmetic operators in PHP.
The calculation formulas for addition, subtraction, multiplication and division are "x y", "x - y", "x * y" and "x / y", which respectively represent the sum, difference, product and quotient of two numbers.
php implementation code is as follows:
<?php $x = 100; $y = 150; echo ($x + $y)."<br>"; // 输出 250 echo ($x - $y)."<br>"; // 输出 -100 echo ($x * $y)."<br>"; // 输出 1500 echo ($x / $y)."<br>"; // 输出 0.6666666666667 echo ($x % $y); // 输出 1 ?>
Output result:
PHP arithmetic operator:
Operator | Name | Description | Instance | Result |
---|---|---|---|---|
x y | Add the sum of | x and y | 2 2 | 4 |
x - y | minus the difference between | x and y | 5 - 2 | 3 |
multiplied by the product of | x and y | 5 * 2 | 10 | |
Divide | Quotient of x and y | 15 / 5 | 3 | |
Modulo (remainder of division) | Remainder of x divided by y | 5 % 2 | 10 % 810 % 2 1 | 20 |
Set a negative number | Take the opposite sign of x | <?php $x = 2;echo -$x;?> |
-2 | |
Inversion | x Inversion, perform "inversion" operation based on binary digits . Operation rules: | ~1=-2; ~0=-1; <?php $x = 2;echo ~$x;?> |
-3 | ##a . b |
Connect two strings | "Hi" . "Ha" | HiHa | ##Related expansion: |
Description | x = y | |
---|---|---|
The left operand is set to the value of the right-hand expression | x = y | |
Add | x -= y | |
minus | x *= y | |
times | x /= y | |
Division | x %= y | |
modulo (remainder of division) | a .= b | |
Connect two strings | Recommended learning: 《 |
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php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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