PHP String Interpolation

In PHP, you can use string interpolation with curly braces to embed variables and expressions within double-quoted strings. This feature allows you to include the values of variables and evaluate expressions directly within the string. Here's how string interpolation with curly braces works in PHP:

Basic Variable Interpolation:

You can include variable values directly within double-quoted strings by wrapping the variable name in curly braces preceded by a dollar sign ({$variable}).

$name = "John";
$message = "Hello, {$name}!";
echo $message; // Output: Hello, John!

Complex Expressions:

You can also evaluate complex expressions and include their results within the string using curly braces. The expression should be enclosed in {}.

$x = 5;
$y = 3;
$result = "The sum of {$x} and {$y} is {$x + $y}.";
echo $result; // Output: The sum of 5 and 3 is 8.

Nested Curly Braces:

If you need to include literal curly braces within your interpolated string, you can escape them by doubling the braces ({{ or }}).

$name = "Alice";
$message = "Hello, {{$name}}!";
echo $message; // Output: Hello, {Alice}!

Array Indexing:

You can interpolate array elements or object properties using curly braces as well.

$person = ['name' => 'Alice', 'age' => 30];
$message = "Hello, {$person['name']}! You are {$person['age']} years old.";
echo $message; // Output: Hello, Alice! You are 30 years old.

In next chapter is string heredoc in php

---

Share this page on :