How Do I Properly Insert PHP Variables into Echoed Strings?

PHP: Inserting Variables into Echoed Strings

When attempting to integrate variables into echoed strings in PHP, one might encounter issues.

Problem:

The code below fails to insert the variable $i into the echoed string:

$i = 1;
echo '
<p class="paragraph$i">
</p>
';
++i;

Solution:

The key to resolving this issue lies in the quotes used for the echoed string. Single quotes do not parse PHP variables, so one must use double quotes or a dot (.) to extend the echo.

Using Double Quotes:

$variableName = 'Ralph';
echo 'Hello ' . $variableName . '!';

Using a Dot to Extend the Echo:

echo "Hello $variableName!";

Applying to the Given Code:

In the given code, the following fixes apply:

Option 1 (Double Quotes):

$i = 1;
echo '<p class="paragraph' . $i . '"></p>';
++i;

Option 2 (Dot to Extend Echo):

$i = 1;
echo "<p class='paragraph$i'></p>";
++i;

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