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@ 2018-04-26T12:31:54Z

<?php
$conditionalFieldsWhitelist = [
    'Basic Fields' => [
        'contact_name',
        'contact_lastname',
    ]
];

$myArray = [
    'Basic Fields' => [
        [
            'field_name' => 'contact_name',
            'field_type' => 'string',
            'field_required' => 'no',
        ], [
            'field_name' => 'contact_lastname',
            'field_type' => 'string',
            'field_required' => 'no',
        ], [
            'field_name' => 'contact_email',
            'field_type' => 'string',
            'field_required' => 'yes',
            'field_placeholder' => 'example@domain.com'
        ], [
            'field_name' => 'contact_mobile',
            'field_type' => 'string',
            'field_required' => 'yes',
            'field_placeholder' => '+27881234567'
        ]
    ]
];
$whitegroups = array_keys($conditionalFieldsWhitelist); // only necessary if multiple groups

foreach ($myArray as $group => $field_sets) {
    if (in_array($group, $whitegroups)) {
        $whitesubsets = $conditionalFieldsWhitelist[$group];
        $result[$group] = array_filter($field_sets, function($set) use ($whitesubsets) { return in_array($set['field_name'],$whitesubsets);});
    }
}

var_export($result);

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1: array ( 'Basic Fields' => array ( 0 => array ( 'field_name' => 'contact_name', 'field_type' => 'string', 'field_required' => 'no', ), 1 => array ( 'field_name' => 'contact_lastname', 'field_type' => 'string', 'field_required' => 'no', ), ), )
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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