String replace functions in PHP - Mini Project: Build & Apply

String replace functions

📖 Scenario: You are working on a simple text editor feature that needs to replace certain words in a sentence.

🎯 Goal: Build a PHP script that replaces specific words in a given sentence using string replace functions.

📋 What You'll Learn

Create a string variable with a given sentence

Create a variable with the word to find

Use a string replace function to replace the word

Print the updated sentence

💡 Why This Matters

🌍 Real World

Replacing words in text is common in text editors, chat applications, and content management systems.

💼 Career

Understanding string replacement helps in data cleaning, user input processing, and building dynamic text features.

1

Create the initial sentence

Create a string variable called sentence and set it to the exact value: 'I love programming in PHP.'

PHP

# Create a string variable called sentence with the value 'I love programming in PHP.'
# Your code here

Need a hint?

Use $sentence = 'your text'; to create the string variable.

2

Set the word to replace

Create a string variable called wordToReplace and set it to the exact value: 'PHP'

PHP

<?php
$sentence = 'I love programming in PHP.';
# Create a string variable called wordToReplace with the value 'PHP'
# Your code here

Need a hint?

Use $wordToReplace = 'PHP'; to create the variable.

3

Replace the word in the sentence

Use the PHP function str_replace to replace $wordToReplace with 'JavaScript' in $sentence. Store the result back in $sentence.

PHP

<?php
$sentence = 'I love programming in PHP.';
$wordToReplace = 'PHP';
# Replace $wordToReplace with 'JavaScript' in $sentence and save it back to $sentence
# Your code here

Need a hint?

Use str_replace($wordToReplace, 'JavaScript', $sentence) to replace the word.

4

Print the updated sentence

Write a print statement to display the updated $sentence.

PHP

<?php
$sentence = 'I love programming in PHP.';
$wordToReplace = 'PHP';
$sentence = str_replace($wordToReplace, 'JavaScript', $sentence);
# Print the updated sentence
# Your code here

Need a hint?

Use print($sentence); to show the result.