check if variable is empty php code example

Example 1: php code to check if variable is null

if(empty($var1)){
    echo 'This line is printed, because the $var1 is empty.';
}

Example 2: php check for empty string

if (empty($var)) {
    echo '$var is either 0, empty, or not set at all';
}

Example 3: php check empty variable

empty var php