Print variable within html code

Question

$a="something";
echo ' <div id="content">$a, but not sure how to do it</div>'

How can I print $a's value inside echo?

Answer 1

echo " <div id=\"content\">$a, but not sure how to do it</div>";

Please read the difference between single and double quotes in PHP.

Answer 2

echo "<div id=\"content\">" . $a . ", but not sure how to do it </div>";

The \'s are escape sequences that allow you to have quotation marks within strings (otherwise they would terminate the string). The .'s are concatenation.

Answer 3

there are many ways

1) use " instead of '

echo " <div id='content'>$a, but not sure how to do it</div>"

2) use {} with " if you are want to print something complex and want your editor to format it correctly. most of the time i use it with arrays or when calling a function ex. {$arr['a']} instead of $arr['a'].

 echo " <div id='content'>{$a}, but not sure how to do it</div>"

3) just do this 

echo ' <div id="content">' . $a . ', but not sure how to do it</div>'