Write a PHP program that contains a function which is to determine whether a text string passed as an argument to the function is a string palindrome or not. If the string is a palindrome, then the function returns true, otherwise it returns false. Note: a string palindrome is a word, phrase, or sequence of characters that reads the same backwards as forwards, e.g. kayak, level, madam, mom, noon. Test your function with these palindromes: a nut for a jar of tuna amore roma borrow or rob Also test your function with words phrases, or sequences of characters that are not palindromes. Use the echo function to display the results. There are several ways to do this, but I am requesting that you use the method given below. Your program must solve the palindrome problem from first principles (see below), and not use any PHP built-in function that is not mentioned below. No other solution will be accepted. Steps for solving the palindrome problem ... Note: You should research the built-in functions given in the following hints. 1. Split the text string into an array of characters, saving it in a variable. str_split() is an built-in function in PHP and may be used to split a given string into an array of single characters. https://www.php.net/manual/en/function.str-split.php 2. Reverse the elements of this array. arrameverse) is an built-in function in PHP and is used to return an array with its elements in reverse order https://www.php.net/manual/en/function array-reverse.php 3. Combine the reversed array elements into a string. inetede is an built-in function in PHP that will produce a string from an array of characters. Set the first parameter to the empty string "". https://www.php.net/manual/en/function.implode.php 4. Compare the initial string to the reversed one, and output the result Take a few screenshots of valid and invalid palindrome strings