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@ 2015-01-05T18:19:15Z

<?php

$array = array (
  0 => '730',
  1 => '724',
  2 => '720',
  3 => '530',
  4 => '56',
  5 => '76',
  6 => '528',
  7 => '394',
  8 => '390',
  9 => '388',
);

$a = 5;
$keys = array_slice( $array, $a-3, 2 );

var_dump($keys);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_slice: documentation ( source)

preferences:dark modelive previewkey bindings

171.04 ms | 405 KiB | 5 Q