Dynamic

Dynamic is a common concept in PHP, and may be used in three distinct situations:

• dynamic call, to call a function or method whose name is in a variable

• dynamic constant, to call a constant whose name is in a variable

• dynamic property, to access a property whose name is in a variable

• dynamic loading, for PHP to load an extension after the start of execution

• dynamic variable, to access a variable whose name is in another variable.

<?php

$a = K;
$x = 'a';
echo $$x; // K

?>

Related : Dynamic Call, Dynamic Constant, Dynamic Properties, Dynamic Loading, Dynamic Variable, Variable Variables