Get the solution ↓↓↓
I am trying to subtract two variables which are in another variable and every time i try there is an error saying "Warning: A non-numeric value encountered". I can do multiplication, addition and even divide the variables but somehow subtraction is giving an error. Below is the code.
$first = 2;
$second = 4;
$answer.='<p>The answer is '.$first - $second.'</p> ';
echo $answer;
Subtract both values into one variable before. You can then echo that one.
$first = 2;
$second = 4;
$result = $first - $second;
$answer.='<p>The answer is '.$result.'</p> ';
echo $answer;
Or put () around the calculation if you want to do it quick and dirty:
$answer.='<p>The answer is '.($first - $second).'</p> ';
echo '<p>The answer is '. ($first - $second) .'</p> ';
//Output "The answer is -2"
Just set parentheses() arround your calculation.
<?php
$first = 2;
$second = 4;
$answer.='<p>The answer is '.($first - $second).'</p> ';
echo $answer;
Our community is visited by hundreds of web development professionals every day. Ask your question and get a quick answer for free.
Find the answer in similar questions on our website.
Do you know the answer to this question? Write a quick response to it. With your help, we will make our community stronger.
PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/
Welcome to the Q&A site for web developers. Here you can ask a question about the problem you are facing and get answers from other experts. We have created a user-friendly interface so that you can quickly and free of charge ask a question about a web programming problem. We also invite other experts to join our community and help other members who ask questions. In addition, you can use our search for questions with a solution.
Ask about the real problem you are facing. Describe in detail what you are doing and what you want to achieve.
Our goal is to create a strong community in which everyone will support each other. If you find a question and know the answer to it, help others with your knowledge.