PHP basic calculator, PHP basic calculator_PHP tutorial

Basic calculator for PHP, basic calculator for PHP

Design a calculation function that can complete calculations and verify unreasonable data and give error prompts.

Rule: The first number and the second number cannot be empty

If the operator is /, the second number cannot be 0.

1 php 2 header('Content-Type: text/html; charset=utf-8'); 3 /*Design a calculation function that can complete operations and verify unreasonable data and give error prompts. 4 Rule: The first number and the second number cannot be empty 5 If the operator is /, the second count cannot be 0.*/ 6 7 function jsq($num1,$oper,$num2){ 8 //The detection data cannot be empty and prompts 9 if(!isset($num1) || !is_numeric($num1)){ 10 $error = <<<ERROR 11 <script> <span>12</span> alert('The first number is illegal'<span>); </span><span>13</span> </script> 14 ERROR; 15 return $error; 16 } 17 if(!isset($num2) || !is_numeric( $num2)){ 18 $error = <<<ERROR 19 <script> <span>20</span> alert('The second number is illegal'<span>); </span><span>21</span> </script> 22 ERROR; 23 return $error; 24 } 25 26 if($oper == "+"){ 27 $result = $num1 + $num2; 28 }elseif($oper == "-"){ 29 $result = $num1 - $num2; 30 }elseif($oper == "*"){ 31 $result = $num1 * $num2; 32 }elseif($oper = "/"){ 33 if($num2 == 0){ 34 $error = <<<ERROR 35 <script> <span>36</span> alert('The second number cannot be 0'<span>); </span><span>37</span> </script> 38 ERROR; 39 return $error; 40 } 41 $result = $num1 / $num2; 42 } 43 return $result; 44 } 45 46 if($_SERVER['REQUEST_METHOD'] == "POST"){ 47 $res = jsq($_POST['num1'],$_POST['oper'],$_POST['num2']); 48 }49 ?> 50 51

Basic calculator written in php

52

53 First number:

54 Operator: 55 + 56 - 57 * 58 / 59

60 Second number:

61 62 63

64 The calculated result is: echo isset($res)?$res:" "; ?> View Code

How to write a calculator web page using PHP code

After php obtains an expression,
analyzes and processes the expression. You can read books on data structures.
If you are just doing a simple calculator, it is to get two numbers and one operator. That would be simpler.
I don’t know how many functions your calculator needs to achieve

How to use php to do addition, subtraction, multiplication, division and remainder calculator based on the following code

Based on your code, I implemented it.
You can give it a try and ask if you have any questions.
Please enter two numbers in the form below to find their value

<...the rest of the text>>

http://www.bkjia.com/PHPjc/899445.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/899445.htmlTechArticlePHP basic calculator, PHP basic calculator is designed with a calculation function that can complete calculations and calculate Unreasonable data will be verified and an error message will be given. Rules: First...