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

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

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PHP Arrays
What will be the output of the following PHP code?
$array1 = array ("KA", "LA", "CA", "MA", "TA");
$array2 = array ("KA", "IA", "CA", "GA", "TA");
$inter = array_intersect ($array1, $array2);
print_r ($inter);

Array ( [0] => KA [1] => LA [2] => CA [3] => MA [4] => TA [5] => IA [6] => GA )
Array ( [1] => LA [3] => MA )
Array ( [0] => KA [2] => CA [4] => TA )
Array ( [1] => IA [3] => GA )

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

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