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

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

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PHP Arrays
What will be the output of the following PHP code?
$a=array("A","Cat","Dog","A","Dog");
$b=array("A","A","Cat","A","Tiger");
$c=array_combine($a,$b);
print_r(array_count_values($c));

Array ( [A] => 2 [Cat] => 1 [Dog] => 4 [Tiger] => 1 )
Array ( [A] => 2 [Cat] => 2 [Dog] => 1 [Tiger] => 1 )
Array ( [A] => 6 [Cat] => 1 [Dog] => 2 [Tiger] => 1 )
Array ( [A] => 5 [Cat] => 2 [Dog] => 2 [Tiger] => 1 )

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