Online PHP editor | refs for 2dWP6

<?php $x = [array ( 'timestamp' => 1505324820, 'dateTimeISO' => '2017-09-13T13:47:00-04:00', 'tempF' => 71, 'dewpointF' => 63, 'humidity' => 76, 'pressureMB' => 1012, 'altimeterMB' => 1013, 'windMPH' => 10, 'windSpeedMPH' => 10, 'windDirDEG' => 240, 'windGustMPH' => NULL, 'visibilityMI' => 10, 'weather' => 'Cloudy', 'weatherShort' => 'Cloudy', 'weatherCoded' => '::OV', 'weatherPrimary' => 'Cloudy', 'weatherPrimaryCoded' => '::OV', 'cloudsCoded' => 'OV', 'heatindexF' => 71, 'windchillF' => 71, 'feelslikeF' => 71, 'sunriseISO' => '2017-09-13T06:42:20-04:00', 'sunsetISO' => '2017-09-13T19:14:27-04:00', 'snowDepthIN' => NULL, 'precipIN' => 0, 'sky' => 100, ), array ( 'timestamp' => 1505325240, 'dateTimeISO' => '2017-09-13T13:54:00-04:00', 'tempF' => 71, 'dewpointF' => 63, 'humidity' => 76, 'pressureMB' => 1012, 'altimeterMB' => 1013, 'windMPH' => 10, 'windSpeedMPH' => 10, 'windDirDEG' => 250, 'windGustMPH' => NULL, 'visibilityMI' => 10, 'weather' => 'Cloudy', 'weatherShort' => 'Cloudy', 'weatherCoded' => '::OV', 'weatherPrimary' => 'Cloudy', 'weatherPrimaryCoded' => '::OV', 'cloudsCoded' => 'OV', 'heatindexF' => 71, 'windchillF' => 71, 'feelslikeF' => 71, 'sunriseISO' => '2017-09-13T06:42:20-04:00', 'sunsetISO' => '2017-09-13T19:14:27-04:00', 'snowDepthIN' => NULL, 'precipIN' => 0, 'tempMax6hrF' => 75, 'tempMin6hrF' => 57, 'sky' => 100, ),]; $x = array_filter($x, function ($array) { return array_key_exists('tempMax6hrF', $array); }); var_dump($x);