PHP Arrays
Array values are keyed by ______ values (called indexed arrays) or using ______ values (called associative arrays). Of course, these key methods can be combined as well.

Float, string
Even number, string
Positive number, negative number
Integer, string
String, Boolean

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

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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] => red [1] => green [2] => blue [3] => yellow )
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 )

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