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mixed unserialize ( string $str )

<?php
$str = 'a:3:{i:0;s:6:"Google";i:1;s:6:"tutorialpro";i:2;s:8:"Facebook";}';
$unserialized_data = unserialize($str);
print_r($unserialized_data);
?>

Array
(
    [0] => Google
    [1] => tutorialpro
    [2] => Facebook
)