What will be the output of the following PHP code? <?php $a1 = array_fill(1, 4, "hello"); $b1 = array_fill(5, 1, "php"); $a2 = array_merge($a1, $a2); print_r($a2); echo "<br>"; print_r($b1); ?>

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Question:What will be the output of the following PHP code? <?php $a1 = array_fill(1, 4, "hello"); $b1 = array_fill(5, 1, "php"); $a2 = array_merge($a1, $a2); print_r($a2); echo "<br>"; print_r($b1); ?>

1.Array ( [1] => hello [4] => hello [5] => php ) Array ( [5] => php )

2.Array ( [1] => hello [2] => hello [3] => hello [4] => hello ) Array ( [5] => php )

3.Array ( [1] => hello [2] => hello [3] => hello [4] => hello [5] => php ) Array ( [5] => php )

4.Array ( [1] => hello [2] => hello [3] => hello [4] => hello ) Array ( [1] => php )

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  1. What will be the output of the following PHP code? <?php $a1 = array_fill(1, 4, "hello"); $b1 = array_fill(5, 1, "php"); $a2 = array_merge($a1, $a2); print_r($a2); echo "<br>"; print_r($b1); ?>
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