Online PHP editor | output for 9NEHS

@ 2022-07-30T01:03:18Z

<?php

$array = [
    [
        'category_id' => 1,
        'question_id' => 1,
        'option_id' => 2,
        'title' => 'Do you wear glasses?',
        'answer' => 'no'
    ],
    [
        'category_id' => 1,
        'question_id' => 2,
        'option_id' => 3,
        'title' => 'Your hobbies ?',
        'answer' => 'movies'
    ],
    [
        'category_id' => 1,
        'question_id' => 4,
        'option_id' => 8,
        'title' => 'what is your status?',
        'answer' => 'single'
    ],
    [
        'category_id' => 1,
        'question_id' => 2,
        'option_id' => 1,
        'title' => 'Your hobbies ?',
        'answer' => 'travel'
    ],
];

$result = [];
foreach ($array as $row) {
    $compositeKey = $row['category_id'] . '_' . $row['question_id'];
    if (!isset($result[$compositeKey])) {
        $result[$compositeKey] = $row;
    } else {
        $result[$compositeKey]['answer'] .= ",{$row['answer']}";
    }
}
var_export(
    array_values(
        $result
    )
);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.18, 8.5.0 - 8.5.3: array ( 0 => array ( 'category_id' => 1, 'question_id' => 1, 'option_id' => 2, 'title' => 'Do you wear glasses?', 'answer' => 'no', ), 1 => array ( 'category_id' => 1, 'question_id' => 2, 'option_id' => 3, 'title' => 'Your hobbies ?', 'answer' => 'movies,travel', ), 2 => array ( 'category_id' => 1, 'question_id' => 4, 'option_id' => 8, 'title' => 'what is your status?', 'answer' => 'single', ), )
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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