Hi! Could we please enable some services and cookies to improve your experience and our website?
Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$res = NULL;
$res1 = NULL;
print_r(gettype($res1));
//print_r(gettype($res) && !is_null($res1));
if(!is_null($res) && !is_null($res1)){
echo' не равен null';
}
elseif(is_null($res) && is_null($res1)){
echo' оба равны null';
}
elseif(!is_null($res) && is_null($res1)){
echo' res не равен null a res1 равен null';
}
elseif(is_null($res) && !is_null($res1)){
echo' res равен null a res1 не равен null';
}