Check if Variable exists and === true

Question

I want to check if:

• a field in the array isset
• the field === true

Is it possible to check this with one if statement?

Answer 1

Alternative, just for fun

echo isItSetAndTrue('foo', array('foo' => true))."
\n";
echo isItSetAndTrue('foo', array('foo' => 'hello'))."
\n";
echo isItSetAndTrue('foo', array('bar' => true))."
\n";

function isItSetAndTrue($field = '', $a = array()) {
    return isset($a[$field]) ? $a[$field] === true ? 'it is set and has a true value':'it is set but not true':'does not exist';
}

results:

it is set and has a true value
it is set but not true
does not exist

Alternative Syntax as well:

$field = 'foo';
$array = array(
    'foo' => true,
    'bar' => true,
    'hello' => 'world',
);

if(isItSetAndTrue($field, $array)) {
    echo "Array index: ".$field." is set and has a true value 
\n";
} 

function isItSetAndTrue($field = '', $a = array()) {
    return isset($a[$field]) ? $a[$field] === true ? true:false:false;
}

Results:

Array index: foo is set and has a true value