1--TEST-- 2Testing dynamic calls using variable variables with curly syntax 3--FILE-- 4<?php 5 6$a = 'b'; 7$b = 'c'; 8$c = 'strtoupper'; 9 10var_dump(${${$a}}('foo') == 'FOO'); 11 12$a = 'b'; 13$b = 'c'; 14$c = 'strtoupper'; 15$strtoupper = 'strtolower'; 16 17var_dump(${${++$a}}('FOO') == 'foo'); 18 19?> 20--EXPECT-- 21bool(true) 22bool(true) 23