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@ 2015-12-20T14:35:21Z

<?php

$data = array_fill_keys(range(100000, 200000), array('key' => 'plid'));
$headerKey = 'key';
$plids = array();
foreach ($data as $key => &$row)
{
    if (isset($row[$headerKey]))
    {
        $plids[] = $row[$headerKey];
    }
}

Output
Performance
VLD
References
Branches

array_fill_keys: documentation ( source)
range: documentation ( source)

preferences:dark modelive preview

28.47 ms | 402 KiB | 5 Q