- var_dump: documentation ( source)
<?php
var_dump(
NULL, (int)NULL,
FALSE, (int)FALSE,
TRUE, (int)TRUE,
NULL, (array)NULL,
FALSE, (array)FALSE,
TRUE, (array)TRUE,
NULL, (string)NULL,
FALSE, (string)FALSE,
TRUE, (string)TRUE,
NULL, (bool)(string)NULL,
FALSE, (bool)(string)FALSE,
TRUE, (bool)(string)TRUE
);