--TEST-- Testing dynamic calls using variable variables with curly syntax --FILE-- <?php $a = 'b'; $b = 'c'; $c = 'strtoupper'; var_dump(${${$a}}('foo') == 'FOO'); $a = 'b'; $b = 'c'; $c = 'strtoupper'; $strtoupper = 'strtolower'; var_dump(${${++$a}}('FOO') == 'foo'); ?> --EXPECT-- bool(true) bool(true)