PHP Arrays
What will be the output of the following PHP code ?
$a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow");
$result = array_flip($a1);
print_r($result);

Array ( [red] => red [green] => green [blue] => blue [yellow] => yellow )
Array ( [a] => a [b] => b [c] => c [d] => d )
Array ( [a] => red [b] => green [c] => blue [d] => yellow )
Array ( [red] => a [green] => b [blue] => c [yellow] => d )

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PHP Arrays
What will be the output of the following PHP code ?
$a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow");
$a2 = array("e" => "red","f" => "green", "g" => "blue");
$result = array_intersect($a1, $a2);
print_r($result);

Array ( [a] => red [b] => green [c] => blue [d] => yellow )
Array ( [e] => red [f] => green [g] => blue )
Array ( [a] => red [b] => green [c] => blue )
Array ( [a] => red [b] => green [c] => blue [d] => yellow [e] => red [f] => green [g] => blue )

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