Heredoc and nowdoc syntax in PHP - Mini Project: Build & Apply

Using Heredoc and Nowdoc Syntax in PHP

📖 Scenario: You are creating a simple PHP script to store and display multi-line text messages. These messages include variables and special characters, so you want to use the best way to write them clearly.

🎯 Goal: Build a PHP script that uses heredoc and nowdoc syntax to store multi-line strings, then display them.

📋 What You'll Learn

Create a variable using heredoc syntax with a multi-line string that includes a variable.

Create a variable using nowdoc syntax with a multi-line string that includes a variable but does not parse it.

Print both variables to show the difference.

💡 Why This Matters

🌍 Real World

Heredoc and nowdoc syntax help PHP developers write multi-line strings clearly, especially when working with templates, emails, or large text blocks.

💼 Career

Understanding these syntaxes is useful for PHP developers working on web applications, content management systems, or any project that involves dynamic text generation.

1

Create a heredoc string with a variable

Create a variable called name and set it to the string "Alice". Then create a variable called heredocText using heredoc syntax that contains the text: Hello, $name! Welcome to heredoc syntax. on one line and This is a multi-line string. on the next line.

PHP

<?php

// Create variable 'name' and set to "Alice"
// Create variable 'heredocText' using heredoc syntax with the specified text
// Your code here

Need a hint?

Remember, heredoc starts with <<<EOD and ends with EOD; on its own line.

2

Create a nowdoc string with a variable

Create a variable called nowdocText using nowdoc syntax that contains the text: Hello, $name! This will not parse the variable. on one line and This is also a multi-line string. on the next line.

PHP

<?php

$name = "Alice";
$heredocText = <<<EOD
Hello, $name! Welcome to heredoc syntax.
This is a multi-line string.
EOD;

// Create variable 'nowdocText' using nowdoc syntax with the specified text
// Your code here

Need a hint?

Nowdoc syntax uses single quotes around the identifier like <<<'EOD'.

3

Print both heredoc and nowdoc variables

Use echo to print the variable heredocText followed by a newline, then print the variable nowdocText.

PHP

<?php

$name = "Alice";
$heredocText = <<<EOD
Hello, $name! Welcome to heredoc syntax.
This is a multi-line string.
EOD;

$nowdocText = <<<'EOD'
Hello, $name! This will not parse the variable.
This is also a multi-line string.
EOD;

// Print 'heredocText' then a newline, then 'nowdocText'
// Your code here

Need a hint?

Use echo and add a newline character "\n" after printing heredocText.

4

Run the script and observe output

Run the PHP script and observe the output. The first printed text should show the variable $name replaced by Alice. The second printed text should show the variable name $name literally, without replacement.

PHP

<?php

$name = "Alice";
$heredocText = <<<EOD
Hello, $name! Welcome to heredoc syntax.
This is a multi-line string.
EOD;

$nowdocText = <<<'EOD'
Hello, $name! This will not parse the variable.
This is also a multi-line string.
EOD;

echo $heredocText . "\n";
echo $nowdocText;

// Run the script and check output

Need a hint?

The heredoc string replaces $name with Alice, but the nowdoc string shows $name as text.