Where is the wrong?

Question

<?php
$string = "Hello World!";
$string2 = "Hi,\"man"";
echo $string2;
echo "<br />";
echo "<p>"Hello World,$string </p>";
// This is a single-line comment
echo "<p>I am learning PHP!</p>";
echo "<p>This is my first program!</p>";
?>

There are some wrong but i don't know.

Answer 1

Here is the right code. There were some mistakes in the 3rd and 6th line.

<?php
$string = "Hello World!";
$string2 = "Hi,\"man\"";
echo $string2;
echo "<br />";
echo "<p>Hello World".$string."</p>";
// This is a single-line comment
echo "<p>I am learning PHP!</p>";
echo "<p>This is my first program!</p>";
?>

Answer 2

<?php
$string = "Hello World!";
$string2 = "Hi,\"man\"";
echo $string2;
echo "<br />";
echo "<p>Hello World,$string</p>";
// This is a single-line comment
echo "<p>I am learning PHP!</p>";
echo "<p>This is my first program!</p>";
?>