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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$res = [1];
$res1 = [1];
print_r(gettype($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';
}