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

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

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PHP Arrays
What will be the output of the following PHP code?
$fname = array("Peter", "Ben", "Joe");
$age = array("35", "37", "43");
$c = array_combine($fname, $age);
print_r($c);

Array ( Peter Ben Joe )
Array ( “[Peter] => 35” “[Ben] => 37” “[Joe] => 43” )
Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )
Array ( 35 37 43 )

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

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

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PHP Arrays
What will be the output of the following PHP code?
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
print_r(array_change_key_case($age, CASE_UPPER));

Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )
Array ( [PeTeR] => 35 [BeN] => 37 [Joe] => 43 )
Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )
Array ( [peter] => 35 [ben] => 37 [joe] => 43 )

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