Why does bool data appear when directly using the var_dump() function to output data forced by settype()?

Question

<?php

$a=100.84;

settype($a,'int');

var_dump($a);

//This will display int (100)

?>

<?php

$a=100.84;

var_dump(settype ($a,'int'));

//This will display bool(true)

?>

Answer 1

settype has a return value, and if the set type conversion is successful, it returns true. Otherwise, it returns false