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<?php $arr = [ "action: Added; amount: 1; code: RNA1; name: Mens Organic T-shirt; colour: White; size: XL", "action: Subtracted; amount: 7; code: RNC1; name: Kids Basic T-shirt; colour: Denim Blue; size: 3-4y", "action: Added; amount: 20; code: RNV1; name: Gift Voucher; style: Mens; value: £20", ]; $keyed = array_reduce($arr, function($collector, $value) { $collector[] = array_reduce(explode('; ', trim($value, '; ')), function($collector, $value) { $parts = explode(': ', $value); $collector[$parts[0]] = $parts[1]; return $collector; }, []); return $collector; }, []); var_dump($keyed);

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