<?php $userIds = [1, 2, 3, 4, 5]; $userIdKeys = array_map(function ($index) { return ":userId_{$index}"; }, range(0, count($userIds) - 1)); $userIds = array_combine($userIdKeys, $userIds); $userIdKeyString = implode(',', $userIdKeys); var_dump($userIdKeyString, $userIds);
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