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@ 2015-09-09T16:10:01Z

<?php
$a = [
        1 => [
            [
                'key' => 'fe',
                'name' => 'En plantilla a dedicación completa',
                'dedication' => 2,
                'relationship' =>2
            ],
            [
                'key' => 'ff',
                'name' => 'Freelance a dedicación completa',
                'dedication' => 2,
                'relationship' => 2
            ],
        ],
        2 => [
            [
                'name' => 'En Plantilla',
                'childs' => [
                    [
                        'key' => 'pem',
                        'name' => 'Mañanas',
                        'dedication' => 1,
                        'relationship' => 2,
                        'shiftPreference' => 3
                    ],
                    [
                        'key' => 'pea',
                        'name' => 'Tardes',
                        'dedication' => 1,
                        'relationship' => 2,
                        'shiftPreference' => 3
                    ],
                    [
                        'key' => 'ped',
                        'name' => 'Indistinto',
                        'dedication' => 4,
                        'relationship' => 5,
                        'shiftPreference' => 1
                    ],
                ],
            ],
            [
                'name' => 'Freelance',
                'childs' => [
                    [
                        'name' => 'Mañanas',
                        'childs' => [
                            [
                                'key' => 'pfmm',
                                'name' => 'Más de 3 horas/día',
                                'dedication' => 1,
                                'relationship' => 2,
                                'shiftPreference' => 3,
                                'hoursOfService' => 5
                            ],
                            [
                                'key' => 'pfml',
                                'name' => 'Menos de 3 horas/día',
                                'parent' => 8,
                                'dedication' => 2,
                                'relationship' => 5,
                                'shiftPreference' => 32,
                                'hoursOfService' => 32
                            ],
                        ],
                    ],
                    [
                        'name' => 'Tardes',
                        'childs' => [
                            [
                                'key' => 'pfam',
                                'name' => 'Más de 3 horas/día',
                                'dedication' => 1,
                                'relationship' => 2,
                                'shiftPreference' => 6,
                                'hoursOfService' => 4
                            ],
                            [
                                'key' => 'pfal',
                                'name' => 'Menos de 3 horas/día',
                                'dedication' => 3,
                                'relationship' => 5,
                                'shiftPreference' => 3,
                                'hoursOfService' => 1
                            ],
                        ],
                    ],
                    [
                        'name' => 'Indistinto',
                        'childs' => [
                            [
                                'key' => 'pfdm',
                                'name' => 'Más de 3 horas/día',
                                'dedication' => 21,
                                'relationship' => 6,
                                'shiftPreference' => 25,
                                'hoursOfService' => 2
                            ],
                            [
                                'key' => 'pfdl',
                                'name' => 'Menos de 3 horas/día',
                                'dedication' => 434,
                                'relationship' => 2245243,
                                'shiftPreference' => 543,
                                'hoursOfService' => 324
                            ],
                        ],
                    ],
                ],
            ],
        ],
    ];
    
     $results = $a[1];
        array_walk_recursive($results, function(&$a){
            unset($a['dedication'], $a['relationship'], $a['shiftPreference'], $a['hoursOfService']);
        });
        
        var_dump($results);
        var_dump($a);

Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Cannot unset string offsets in /in/4LdKf:118 Stack trace: #0 [internal function]: {closure}('fe', 'key') #1 /in/4LdKf(117): array_walk_recursive(Array, Object(Closure)) #2 {main} thrown in /in/4LdKf on line 118
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28: Fatal error: Uncaught Error: Cannot unset string offsets in /in/4LdKf:118 Stack trace: #0 [internal function]: {closure}('fe', 'key') #1 /in/4LdKf(119): array_walk_recursive(Array, Object(Closure)) #2 {main} thrown in /in/4LdKf on line 118
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Cannot unset string offsets in /in/4LdKf on line 118
Process exited with code 255.

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