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@ 2019-08-27T10:46:25Z

<?php
$sampleData = range(80, 110);
foreach ($sampleData as $value) {
    $result[(10 * ((int)(($value - 1) / 10) <=> 9) + 100) . '+under'][] = $value;
}
var_export($result);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
range: documentation ( source)

preferences:dark modelive previewkey bindings

36.16 ms | 405 KiB | 5 Q