Online PHP editor | perf for smH8Y

@ 2023-10-11T09:31:58Z

<?php
function flatten($input_data, $path = "", $delimiter = ".", &$output = null) {
    if (is_null($output)) {
        $output = [];
    }

    if (is_array($input_data)) {
        if (isAssoc($input_data)) {
            array_push($output, [$path, new stdClass()]);
            foreach ($input_data as $key => $value) {
                if (!is_string($key)) {
                    throw new Exception("Dictionary key must be a string, found " . gettype($key) . " instead.");
                }
                $new_key = $path ? $path . $delimiter . $key : $key;
                if (strpos($key, $delimiter) !== false) {
                    throw new Exception("Key '{$key}' contains the delimiter '{$delimiter}'.");
                }
                flatten($value, $new_key, $delimiter, $output);
            }
        } else {
            array_push($output, [$path, []]);
            foreach ($input_data as $i => $value) {
                $new_key = $path ? $path . $delimiter . $i : strval($i);
                flatten($value, $new_key, $delimiter, $output);
            }
        }
    } else {
        array_push($output, [$path, $input_data]);
    }
    return $output;
}

function isAssoc(array $arr) {
    if (array() === $arr) return false;
    return array_keys($arr) !== range(0, count($arr) - 1);
}

function unflatten($array_data, $delimiter = '.') {
    $root = $array_data[0][1];
    if (!is_array($root) && !is_object($root)) {
        return $root;
    }
    array_shift($array_data);
    foreach ($array_data as [$path, $value]) {
        $path_parts = explode($delimiter, $path);
        $target = &$root;
        foreach ($path_parts as $part) {
            if (is_numeric($part)) {
                $part = intval($part);
            }
if (is_array($target)) {
    $target = &$target[$part];
} elseif (is_object($target)) {
    $target = &$target->$part;
} else {
    // Handle error
}

        }
        $target = $value;
    }
    return $root;
}

function test_flatten_unflatten() {
    $test_cases = [
        [
            'input' => ['name' => 'John', 'age' => 30],
            'expected_flatten' => [
                ['', new stdClass()],
                ['name', 'John'],
                ['age', 30]
            ]
        ],
        [
            'input' => ['animals' => ['dog', 'cat']],
            'expected_flatten' => [
                ['', new stdClass()],
                ['animals', []],
                ['animals.0', 'dog'],
                ['animals.1', 'cat']
            ]
        ],
        [
            'input' => 'hello',
            'expected_flatten' => [
                ['', 'hello']
            ]
        ],
        [
            'input' => [],
            'expected_flatten' => [
                ['', []]
            ]
        ],
        [
            'input' => new stdClass(),
            'expected_flatten' => [
                ['', new stdClass()]
            ]
        ]
    ];

    foreach ($test_cases as $i => $test_case) {
        $input = $test_case['input'];
        $expected_flatten = $test_case['expected_flatten'];
        
        $flattened = flatten($input);
        if ($flattened === $expected_flatten) {
            echo "Test case $i for flatten: Passed\n";
        } else {
            echo "Test case $i for flatten: Failed\n";
            print_r($flattened);
        }

        $unflattened = unflatten($flattened);
        if ($unflattened == $input) {
            echo "Test case $i for unflatten: Passed\n";
        } else {
            echo "Test case $i for unflatten: Failed\n";
            print_r($unflattened);
        }
    }
}

// Run the test
test_flatten_unflatten();
?>

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.5.1	0.011	0.007	16.80
8.5.0	0.014	0.009	20.06
8.4.15	0.003	0.000	14.05
8.4.14	0.012	0.009	17.80
8.4.13	0.010	0.010	18.90
8.4.12	0.015	0.005	24.24
8.4.11	0.012	0.008	19.10
8.4.10	0.005	0.004	18.96
8.4.9	0.012	0.009	22.07
8.4.8	0.006	0.003	20.54
8.4.7	0.012	0.010	17.70
8.4.6	0.013	0.008	18.95
8.4.5	0.004	0.005	18.68
8.4.4	0.003	0.007	17.91
8.4.3	0.010	0.010	18.95
8.4.2	0.017	0.003	17.97
8.4.1	0.000	0.009	19.57
8.3.28	0.016	0.008	18.48
8.3.27	0.009	0.012	16.53
8.3.26	0.010	0.009	16.74
8.3.25	0.005	0.004	18.94
8.3.24	0.009	0.010	17.21
8.3.23	0.005	0.004	16.30
8.3.22	0.010	0.008	18.97
8.3.21	0.007	0.001	16.57
8.3.20	0.004	0.005	16.73
8.3.19	0.011	0.009	19.09
8.3.18	0.011	0.008	16.99
8.3.17	0.009	0.009	19.00
8.3.16	0.006	0.003	17.00
8.3.15	0.009	0.000	19.08
8.3.14	0.004	0.004	17.03
8.3.13	0.006	0.003	18.43
8.3.12	0.003	0.009	18.79
8.3.11	0.006	0.003	20.94
8.3.10	0.006	0.003	24.06
8.3.9	0.011	0.004	26.77
8.3.8	0.012	0.000	17.97
8.3.7	0.012	0.009	16.50
8.3.6	0.009	0.006	16.63
8.3.5	0.004	0.018	18.53
8.3.4	0.010	0.003	22.08
8.3.3	0.007	0.010	19.38
8.3.2	0.004	0.004	24.18
8.3.1	0.004	0.004	24.66
8.3.0	0.004	0.004	26.16
8.2.29	0.006	0.013	20.25
8.2.28	0.004	0.004	18.20
8.2.27	0.004	0.004	17.18
8.2.26	0.004	0.004	16.59
8.2.25	0.004	0.004	18.24
8.2.24	0.004	0.004	17.21
8.2.23	0.000	0.009	22.58
8.2.22	0.004	0.004	37.54
8.2.21	0.005	0.003	26.77
8.2.20	0.003	0.006	16.50
8.2.19	0.013	0.009	16.63
8.2.18	0.018	0.000	16.50
8.2.17	0.000	0.016	19.09
8.2.16	0.016	0.003	22.96
8.2.15	0.000	0.008	25.66
8.2.14	0.005	0.003	24.66
8.2.13	0.004	0.004	18.09
8.2.12	0.004	0.004	26.16
8.2.11	0.006	0.005	21.26
8.2.10	0.006	0.006	19.71
8.2.9	0.011	0.002	20.61
8.2.8	0.002	0.009	19.72
8.2.7	0.007	0.004	19.76
8.2.6	0.008	0.004	18.87
8.2.5	0.008	0.003	18.71
8.2.4	0.004	0.006	18.78
8.2.3	0.006	0.005	18.76
8.2.2	0.007	0.003	18.65
8.2.1	0.008	0.003	18.63
8.2.0	0.009	0.002	18.70
8.1.33	0.016	0.003	21.82
8.1.32	0.009	0.007	18.02
8.1.31	0.012	0.012	16.09
8.1.30	0.012	0.006	18.49
8.1.29	0.008	0.003	30.84
8.1.28	0.004	0.011	25.92
8.1.27	0.004	0.004	24.66
8.1.26	0.007	0.000	26.35
8.1.25	0.000	0.008	28.09
8.1.24	0.004	0.007	19.43
8.1.23	0.005	0.005	18.53
8.1.22	0.003	0.008	18.61
8.1.21	0.008	0.003	19.84
8.1.20	0.005	0.005	18.59
8.1.19	0.005	0.005	18.57
8.1.18	0.004	0.007	18.44
8.1.17	0.005	0.005	18.38
8.1.16	0.007	0.004	18.70
8.1.15	0.007	0.003	19.46
8.1.14	0.007	0.004	19.34
8.1.13	0.009	0.002	19.42
8.1.12	0.000	0.010	19.49
8.1.11	0.010	0.000	20.36
8.1.10	0.007	0.003	19.40
8.1.9	0.007	0.005	19.42
8.1.8	0.009	0.002	19.38
8.1.7	0.007	0.003	18.80
8.1.6	0.005	0.005	18.68
8.1.5	0.007	0.004	18.61
8.1.4	0.005	0.005	18.62
8.1.3	0.007	0.004	18.70
8.1.2	0.010	0.000	18.75
8.1.1	0.006	0.004	18.44
8.1.0	0.006	0.003	18.69
8.0.30	0.009	0.002	17.81
8.0.29	0.008	0.003	18.75
8.0.28	0.005	0.005	18.64
8.0.27	0.005	0.005	18.71
8.0.26	0.007	0.003	17.87
8.0.25	0.005	0.005	17.96
8.0.24	0.006	0.004	18.76
8.0.23	0.006	0.004	17.87
8.0.22	0.008	0.002	17.87
8.0.21	0.005	0.005	17.77
8.0.20	0.002	0.008	17.90
8.0.19	0.008	0.002	17.90
8.0.18	0.007	0.003	17.93
8.0.17	0.003	0.007	17.92
8.0.16	0.005	0.005	17.92
8.0.15	0.007	0.003	17.73
8.0.14	0.005	0.005	17.85
8.0.13	0.007	0.004	18.65
8.0.12	0.005	0.005	18.72
8.0.11	0.008	0.002	18.84
8.0.10	0.007	0.003	17.88
8.0.9	0.009	0.002	17.74
8.0.8	0.005	0.005	17.77
8.0.7	0.007	0.003	17.59
8.0.6	0.002	0.009	17.68
8.0.5	0.005	0.005	17.82
8.0.3	0.008	0.002	18.01
8.0.2	0.010	0.000	18.02
8.0.1	0.007	0.003	17.95

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