w3resource

PHP functions - Exercises, Practice, Solution

PHP functions [ 6 exercises with solution]

1. Write a function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument. Go to the editor

Click me to see the solution

2. Write a function to check whether a number is prime or not. Go to the editor
Note: A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Click me to see the solution

3. Write a function to reverse a string. Go to the editor

Click me to see the solution

4. Write a function to sort an array. Go to the editor

Click me to see the solution

5. Write a PHP function that checks whether a string is all lowercase. Go to the editor
Click me to see the solution

6. Write a PHP function that checks whether a passed string is a palindrome or not? Go to the editor
A palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.

Click me to see the solution

PHP Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.



Follow us on Facebook and Twitter for latest update.

PHP: Tips of the Day

PHP: How to get a variable name as a string in PHP?

You could use get_defined_vars() to find the name of a variable that has the same value as the one you're trying to find the name of. Obviously this will not always work, since different variables often have the same values, but it's the only way I can think of to do this.

Edit: get_defined_vars() doesn't seem to be working correctly, it returns 'var' because $var is used in the function itself. $GLOBALS seems to work so I've changed it to that.

function print_var_name($var) {
    foreach($GLOBALS as $var_name => $value) {
        if ($value === $var) {
            return $var_name;
        }
    }

    return false;
}

Edit: to be clear, there is no good way to do this in PHP, which is probably because you shouldn't have to do it. There are probably better ways of doing what you're trying to do.

Ref : https://bit.ly/37qFimU