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<?php const UNIT_FACTOR = [ 'g' => 1, 'Kg' => 1000, ]; $weights = ['1 Kg','300 g','1.5 Kg','20 g','5 Kg']; $grams = []; foreach ($weights as $weight) { sscanf($weight, '%f%s', $amount, $unit); $grams[] = $amount * UNIT_FACTOR[$unit]; } array_multisort($grams, $weights); var_export($weights);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => '20 g', 1 => '300 g', 2 => '1 Kg', 3 => '1.5 Kg', 4 => '5 Kg', )

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