0xD34F

preg_match_all('~\[(.+?)\|(.+?)\]~', $str, $matches);

echo preg_replace_callback('~\[(.+?)\]~', fn($m) => $array[$m[1]] ?? $m[0], $message);

preg_match_all('~\b\d{2}-\d{2}-\d{4}\b~', $str, $matches);

$letter = 'М';

$i = 0;
foreach (explode(', ', implode(', ', $products)) as $product) {
  if (strpos($product, $letter) === 0) {
    echo (++$i).") $product\n";
  }
}

(int)$url_params['1']

$arr3 = array_filter($arr1, fn($n) => in_array($n, $arr2));

// или

$arr3 = array_intersect($arr1, $arr2);

$grouped = [];

foreach ($arr as $n) {
  $grouped[$n['category_id']][] = $n['text'];
}

foreach ($grouped as $key => $values) {
  echo "
    <fieldset>
      <legend>$key</legend>".
      implode('', array_map(fn($n) => "<div>$n</div>", $values))."
    </fieldset>";
}

$ids = array_unique(array_column($arr, 'user_id'));
$result = array_filter($arr2, fn($n) => !in_array($n['users_id'], $ids));

$fileCodes = [];
array_walk_recursive($array, function($v, $k) use(&$fileCodes) {
  if ($k === 'fileCode') {
    $fileCodes[] = $v;
  }
});

$key = 'shipping_address';
$_arr1 = array_combine(array_column($arr1, $key), $arr1);

$result = [
  ...array_map(fn($n) => $n + ($_arr1[$n[$key]] ?? []), $arr2),
  ...array_diff_key($_arr1, array_combine(array_column($arr2, $key), $arr2))
];

$arr = [ '...', '...', ... ];
$newStr = preg_replace('~'.implode('|', $arr).'~ui', '', $str);

$grouped = [];

foreach ($arr as $key => $items) {
  $group = [
    'UF_SUBJECT' => $items[0]['UF_SUBJECT'],
    'UF_QUANTITY' => 0,
    'UF_BRAK' => 0,
    'UF_WAREHOUSENAME' => [],
  ];

  foreach ($items as $item) {
    $group['UF_QUANTITY'] += $item['UF_QUANTITY'];
    $group['UF_BRAK'] += $item['UF_BRAK'];
    $group['UF_WAREHOUSENAME'][] = $item['UF_WAREHOUSENAME']." (".$item['UF_QUANTITY']." шт)";
  }

  $group['UF_WAREHOUSENAME'] = implode(', ', $group['UF_WAREHOUSENAME']);

  $grouped[$key] = $group;
}

Такое вообще возможно?

$items = array_combine(
  array_column($arr2['entries'], 'name_item'),
  $arr2['entries']
);

$keys = [ 'price_item', 'image_item' ];

foreach ($arr1 as $n) {
  foreach ($keys as $k) {
    $n[$k] = $items[$n[0]][$k];
  }

  $arr3[] = $n;
}

url.match(/.+\//)[0]

// или

url.replace(/[^\/]+$/, '')

// или

url.slice(0, url.lastIndexOf('/') + 1)

// или

url.split(/(?<=\/)/).slice(0, -1).join('')

// или

[...url].reduceRight((acc, n) => (acc || n === '/') ? n + acc : acc, '')