Online PHP editor | output for r1Sc9

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