Write a function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.
Write a function to check whether a number is prime or not. Note: A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.
Write a function to reverse a string.
Write a function to sort an array.
Write a PHP function that checks whether a string is all lowercase.
Write a PHP function that checks whether a passed string is a palindrome or not?
Write a PHP program to calculate area of rectangle by using PHP Function.
Write a PHP program to calculate sum of 3 given number by using PHP Function with return type.
Write a PHP Program to check a given number is either Even or Odd using PHP function.
Write a PHP Program to generate a febonacci series using PHP functions
