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run code in 300+ PHP versions simultaneously

@ 2020-03-28T17:59:27Z

<?php

$list = array(
'ind' => array(
    'messagetype' => 'Alert',
    'visibility' => 'Public',
    'info' => array(
        0 => array(
            'urgency' => 'Urgent',
            'params' => array(
                0 => array(
                    'Name' => 'display',
                    'value' => '3; top',
                ),
                1 => array(
                    'Name' => 'level',
                    'value' => '1; blue',
                ),
            ),
            'area' => array(
                'ard' => 'Bob',
                'code' => array(
                    0 => array(
                        'Name' => 'Badge',
                        'value' => 'GSSD154',
                    ),
                ),
            ),
        ),
        1 => array(
            'messagetype' => 'Information',
            'visibility' => 'Private',
            'info' => array(
                0 => array(
                    'urgency' => 'Minor',
                    'params' => array(
                        0 => array(
                            'Name' => 'display',
                            'value' => '1; left',
                        ),
                        1 => array(
                            'Name' => 'level',
                            'value' => '1; red',
                        ),
                    ),
                    'area' => array(
                        'ard' => 'Bob',
                        'code' => array(
                            0 => array(
                                'Name' => 'Badge',
                                'value' => 'GBECS23',
                            ),
                        ),
                    ),
                ),
            ),
        ),
    ),
),

);

function replaceKeys(&$arr) {
    
    foreach ($arr as &$v) {
        if ( !is_array($v) )
            continue;
        
        $keys = array_keys($v);
        $count = count($keys);

        if ( $count < 2 ||
             $keys !== array_flip($keys) ||
             array_keys(array_merge(...$v)) !== ['Name', 'value'] ) {
            replaceKeys($v);
            continue;
        }
        
        foreach ($v as $k => &$item) {
            $item = array_combine(["Name$k", "value$k"], $item);
        }
    }
}

replaceKeys($list);
print_r($list);

Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Array ( [ind] => Array ( [messagetype] => Alert [visibility] => Public [info] => Array ( [0] => Array ( [urgency] => Urgent [params] => Array ( [0] => Array ( [Name0] => display [value0] => 3; top ) [1] => Array ( [Name1] => level [value1] => 1; blue ) ) [area] => Array ( [ard] => Bob [code] => Array ( [0] => Array ( [Name] => Badge [value] => GSSD154 ) ) ) ) [1] => Array ( [messagetype] => Information [visibility] => Private [info] => Array ( [0] => Array ( [urgency] => Minor [params] => Array ( [0] => Array ( [Name0] => display [value0] => 1; left ) [1] => Array ( [Name1] => level [value1] => 1; red ) ) [area] => Array ( [ard] => Bob [code] => Array ( [0] => Array ( [Name] => Badge [value] => GBECS23 ) ) ) ) ) ) ) ) )

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