String Manipulation: Reversing Words in PHP | CodeSignal Learn

String Manipulation: Reversing Words in PHP | CodeSignal Learn

Our first task is to separate the words in the sentence. In PHP, the explode() function allows us to achieve this easily. The delimiter you'll use in the explode() function is a single space " ". Here is a sample code to illustrate this:

PHP

$inputStr = "Hello neat php_lovers_123";
$words = explode(" ", $inputStr);

// Now the array 'words' holds all the words of the string

Note that " " as the delimiter ensures that the string is split at each space, effectively separating the words.

Next, we need to reverse each word separated in the previous step. In PHP, we can use the strrev() function to do this. Let's add these lines to our existing code:

PHP

$reversedWords = [];

foreach ($words as $word) {
    $reversedWords[] = strrev($word);
}

// 'reversedWords' now contains the reversed words

Step-by-Step Solution Building: Step 3

Finally, we need to consolidate these reversed words into a single string, separated by spaces. We can achieve this using the implode() function in PHP . Here's how we do that: PHP $finalStr = implode(" ", $reversedWords); This joins all the elements of the reversedWords array into a single string with each word separated by a space.

Final Solution

It remains for us to combine the code from the steps together in a function reverseWords and test it. PHP<?php function reverseWords($inputStr) { $words = explode(" ", $inputStr); $reversedWords = []; foreach ($words as $word) { $reversedWords[] = strrev($word); } return implode(" ", $reversedWords); } // Test the function echo reverseWords("Hello neat php_lovers_123"); // prints: 'olleH taen 321_srevol_php' ?>