<?php $array = [[ 2 => 9.6 ], [ 497 => 11.666666666667 ], [ 451 => 34 ], [ 459 => 8.8 ], [ 461 => 22.5 ]]; echo 'Before:', PHP_EOL; print_r($array); usort($array, function($a, $b) { return reset($b) <=> reset($a); }); echo 'After:', PHP_EOL; print_r($array);
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Value for `_results` contains invalid data `array`