PHP Arrays
What elements will the following script output?
$array = array (true => 'a', 1 => 'b');
var_dump ($array);

None
It will output NULL
1 => 'b'
True => 'a', 1 => 'b'

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PHP Arrays
What will be the output of the following PHP code?
$cars = array("Volvo", "BMW", "Toyota", "Honda", "Mercedes", "Opel");
print_r(array_chunk($cars, 2));

Array ( [1] => Array ( [1] => Volvo [2] => BMW ) [2] => Array ( [1] => Toyota [2] => Honda ) [3] => Array ( [1] => Mercedes [2] => Opel ) )
Array ( [0] => Array ( [0] => Volvo [1] => BMW ) [1] => Array ( [0] => Toyota [1] => Honda ) [2] => Array ( [0] => Mercedes [1] => Opel ) )
Array ( [0] => Array ( [0] => Volvo [1] => Volvo ) [1] => Array ( [0] => BMW [1] => BMW ) [2] => Array ( [0] => Toyota [1] => Toyota ) )
Array ( [0] => Array ( [1] => Volvo [2] => BMW ) [1] => Array ( [1] => Toyota [2] => Honda ) [2] => Array ( [1] => Mercedes [2] => Opel ) )

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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");
$result = array_flip($a1);
print_r($result);

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

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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", "h" => "orange");
$a3 = array("i" => "orange");
$a4 = array_combine($a2, $a3);
$result = array_diff($a4, $a2);
print_r($result);

Array ( [i] => orange )
Array ( [h] => orange )
Array ( [d] => yellow )
Array ( [d] => yellow [h] => orange )

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