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PHP Basics

Print a value from a PHP script.

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The concept

PHP variables begin with $. The echo statement writes to output; the newline character starts a new line in a terminal.

PHP

<?php
$name = "Ada";
echo "Hello, $name\n";

Output

Hello, Ada

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Guided walkthroughReady

1<?php

2$name = "Ada";

3echo "Hello, $name\n";

Start to inspect the source, values, and output. These prepared steps explain the published sample; grouped loop steps describe multiple iterations.

View the complete dry-run table

Prepared trace of the published program. Some rows group repeated iterations.
Step / line	What happens	State after step	Output so far
	Assign Ada to the PHP variable.	`$name = "Ada"`	—
	Interpolate the variable and echo the result.	`$name = "Ada"`	Hello, Ada

How PHP processes this code

The PHP runtime executes the script. echo writes to the response or terminal output.