Online PHP editor | perf for daMKh

<?php // inside a class method $quotes = $this->listQuotes(); // $quotes now contains a list of quotes: // var_dump($quotes) will output something like: // array (size=26) // 0 => // array (size=23) // 'order_number' => string '12345678' (length=8) // 'customer_number' => string '111111' (length=6) // 'status' => string 'active' (length=6) // 'expired_date' => string '2017-08-06' (length=10) // 'quote_total' => float 24.61 // 'lineitems' => // array (size=0) // empty // 1 => // array (size=23) // ... // PROBLEM: I need to add an element to each of the arrays called grand_total // The output should then look something like this: // // array (size=26) // 0 => // array (size=23) // 'order_number' => string '12345678' (length=8) // 'customer_number' => string '111111' (length=6) // 'status' => string 'active' (length=6) // 'expired_date' => string '2017-08-06' (length=10) // 'quote_total' => float 24.61 // 'lineitems' => // array (size=0) // empty // 'grand_total' => array(size=2) // 'tax_inclusive' => float 123.45 // 'tax_exclusive' => float 120.00 // ] // 1 => // array (size=23) // ... // Routine would be something like $quotes = $this->listQuotes(); array_walk($quotes, function($quote, $key) { $quote['grand_total'] = [ 'tax_inclusive' => 123.45, 'tax_exclusive' => 120.00 ] }); // Then var_dump($quotes) *should* give me the expected described as above... // // I've tried with array_walk, array_map, and even a foreach. No errors setting the value, but the original list that gets returned is unchanged.

Version	System time (s)	User time (s)	Memory (MiB)
7.1.7	0.019	0.003	15.14
7.1.6	0.028	0.012	33.07
7.1.5	0.032	0.014	32.88
7.1.4	0.027	0.014	32.48
7.1.3	0.026	0.011	32.72
7.1.2	0.023	0.016	32.84
7.1.1	0.017	0.006	14.67
7.1.0	0.015	0.006	14.84
7.0.20	0.017	0.007	14.69
7.0.19	0.016	0.008	14.73
7.0.18	0.012	0.012	14.20
7.0.17	0.014	0.007	14.41
7.0.16	0.093	0.010	14.25
7.0.15	0.014	0.008	14.25
7.0.14	0.007	0.014	14.44
7.0.13	0.022	0.004	14.30
7.0.12	0.019	0.003	14.41
7.0.11	0.022	0.000	14.24
7.0.10	0.013	0.010	14.40
7.0.9	0.019	0.003	14.29
7.0.8	0.019	0.003	14.33
7.0.7	0.012	0.009	14.37
7.0.6	0.018	0.004	14.24
7.0.5	0.015	0.006	14.55
7.0.4	0.016	0.006	14.76
7.0.3	0.005	0.009	14.58
7.0.2	0.017	0.006	14.38
7.0.1	0.019	0.003	14.61
7.0.0	0.014	0.008	14.52