Online PHP editor | output for Aa1FA

<?php var_dump($a = memory_get_usage()); class Foo{ function test(){ return "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; } } var_dump(memory_get_usage() - $a); $a = memory_get_usage(); $v1 = (new Foo)->test(); var_dump(memory_get_usage() - $a); $a = memory_get_usage(); $v2 = (new Foo)->test(); var_dump(memory_get_usage() - $a); $a = memory_get_usage(); $v3 = (new Foo)->test(); var_dump(memory_get_usage() - $a); $a = memory_get_usage(); $v4 = (new Foo)->test(); var_dump(memory_get_usage() - $a); $a = memory_get_usage(); $v5 = (new Foo)->test(); var_dump(memory_get_usage() - $a); $a = memory_get_usage();