Use single quotes to print the variable name, not the value in PHP

Description

The following code shows how to use single quotes to print the variable name, not the value.

Example

/*  w  w  w. ja va2s.co  m*/
<?php
    $color = "red";
    echo "Roses are $color";
    echo "<br>";
    echo 'Roses are $color';
?>

The code above generates the following result.