How do you create a function library in PHP

Creating a function library in PHP allows developers to organize reusable code snippets that can be called in various parts of an application. This promotes code reusability and maintainability.

Learn how to create a PHP function library that can streamline your coding process and improve project efficiency.

PHP, function library, reusable code, programming, software development


        <?php
        // Define a function library file called 'function_library.php'
        
        // Function to add two numbers
        function add($a, $b) {
            return $a + $b;
        }

        // Function to subtract two numbers
        function subtract($a, $b) {
            return $a - $b;
        }
        
        // Function to multiply two numbers
        function multiply($a, $b) {
            return $a * $b;
        }

        // Function to divide two numbers
        function divide($a, $b) {
            if ($b == 0) {
                return 'Error: Division by zero';
            }
            return $a / $b;
        }
        
        // Example usage of the functions
        echo add(5, 3);      // Outputs: 8
        echo subtract(5, 3); // Outputs: 2
        echo multiply(5, 3); // Outputs: 15
        echo divide(5, 3);   // Outputs: 1.6666666666667
        echo divide(5, 0);   // Outputs: Error: Division by zero
        ?>

How do you create a function library in PHP

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How do you create a function library in PHP

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