Online PHP editor | output for ITq52

@ 2022-07-28T07:28:40Z

<?php

$data = [
  ["id" => 1, "begin" => "01/01", "diagnostic" => "a"],
  ["id" => 1, "begin" => "01/01", "diagnostic" => "b"],
  ["id" => 1, "begin" => "01/01", "diagnostic" => ""],
  ["id" => 1, "begin" => "02/02", "diagnostic" => "a"],
];

$result = [];
foreach ($data as $row) {
    $compositeKey = $row['id'] . '-' . $row['begin'];
    if (!isset($result[$compositeKey])) {
        $result[$compositeKey] = $row;
    } elseif (strlen($row['diagnostic'])) {
        $result[$compositeKey]['diagnostic'] .= (strlen($result[$compositeKey]['diagnostic']) ? ', ' : '') . $row['diagnostic'];
    }
}
var_export(array_values($result));

Output for 7.4.0 - 7.4.33, 8.0.1 - 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, 8.5.0: array ( 0 => array ( 'id' => 1, 'begin' => '01/01', 'diagnostic' => 'a, b', ), 1 => array ( 'id' => 1, 'begin' => '02/02', 'diagnostic' => 'a', ), )
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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