<?php $yourArray = [ ['item1' => 80], ['item2' => 25], ['item3' => 85], ]; usort( $yourArray, fn(array $a, array $b): int => reset($a) /* get the first array elements from $a */ <=> /* <--- the spaceship operator */ reset($b) /* and from $b for comparison */ ); print_r($yourArray);
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Value for `_results` contains invalid data `array`