Creating a Dynamic Variable Name(Variable Variables)

Use PHP's variable variable syntax by assign a $ to a variable whose value is the variable name you want:

<?php
 $a = "Hello";
$hello = "Hello Everyone";
echo $$a."<br/>";
?>

Output: Hello Everyone

Discussion:

The previous example prints Hello Everyone. Because $a = 'hello', $$a is $hello.

Using curly braces, you can construct more complicated expressions that indicate variable names: 

$stooges = array('Moe','Larry','Curly');
$stooge_moe = 'Moses Horwitz';
$stooge_larry = 'Louis Feinberg';
$stooge_curly = 'Jerome Horwitz';

foreach ($stooges as $s) {
  print "$s's real name was ${'stooge_'.strtolower($s)}.\n";
}
Moe's real name was Moses Horwitz.
Larry's real name was Louis Feinberg.
Curly's real name was Jerome Horwitz.

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