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@ 2019-04-03T08:32:10Z

<?php

$arr = ["1549440811" => 1, "1549448226" => 2, "1551108588" => 3 ];
$range = "1549460338";

$filtered = array_filter(
    $arr,
    function ($key) use ($range) {
        return $range > $key;
    },
    ARRAY_FILTER_USE_KEY
);


print_r($filtered);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_filter: documentation ( source)

preferences:dark modelive previewkey bindings

30.85 ms | 405 KiB | 5 Q