<?php class A { public function __construct() { echo $this->formatColumnsWithValues(['key' => 'value', 'foo' => 'bar', 'empty' => '']); } private function formatColumnsWithValues(array $kRow): string { $kRow = array_filter($kRow); array_walk($kRow, fn (&$v, $k) => $v = sprintf("%s: %s\n", $k, $v)); return implode("</p><p>", $kRow); } } $a = new A();
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