what does isset do in php code example
Example 1: php shorthand if isset
$var = $var ?? "default";Example 2: isset in php
$age = 0;
// Evaluates as true because $age is set
if (isset($age)) {
echo '$age is set even though it is empty';
}$var = $var ?? "default";$age = 0;
// Evaluates as true because $age is set
if (isset($age)) {
echo '$age is set even though it is empty';
}