PHP Arrays
Which array function checks if the specified key exists in the array?

array_keys_exists()
arrays_key_exists()
array_key_exist()
array_key_exists()

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PHP Arrays
What will be the output of the following PHP code?
$fruits = array ("apple", "mango", "peach", "pear", "orange");
$subset = array_slice ($fruits, 2);
print_r ($subset);

Array ( [0] => peach )
Array ( [0] => peach [1] => pear [2] => orange )
Array ( [0] => apple [1] => mango )
Array ( [0] => apple [1] => mango [2] => peach )

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

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PHP Arrays
What will be the output of the following PHP code?
$fruits = array ("mango", "apple", "peach", "pear");
$fruits = asort ($fruits);
printr ($fruits);

Error
Array ( [1] => apple [0] => mango [2] => peach [3] => pear )
Array ( [0] => apple [1] => mango [2] => peach [3] => pear )
Array ( [1] => apple [0] => mango [3] => peach [2] => pear )

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PHP Arrays
What will be the output of the following PHP code?
$a1 = array("red", "green");
$a2 = array("blue", "yellow");
$a3 = array_merge($a1, $a2);
$a4 = array("a", "b", "c", "d");
$a = array_combine($a4, $a3);
print_r($a);

Array ( [0] => blue [1] => yellow [2] => red [3] => green )
Array ( [a] => red [b] => green [c] => blue [d] => yellow )
Array ( [a] => blue [b] => yellow [c] => red [d] => green )
Array ( [0] => red [1] => green [2] => blue [3] => yellow )

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