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@ 2013-11-25T23:19:26Z

<?php

$startMemory = memory_get_usage();
$array = new SplFixedArray(100000);
for ($i = 0; $i < 100000; ++$i) {
    $array[$i] = $i;
}
echo memory_get_usage() - $startMemory, ' bytes';

Output
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memory_get_usage: documentation ( source)

preferences:dark modelive preview

43.96 ms | 402 KiB | 5 Q