<?php function v1($first, $last) { $result = trim($first); $lastName = trim($last); if ($lastName) { if (!empty($result)) { $result .= ' '; } $result .= $lastName; } return $result; } function v2($first, $last) { return implode(" ", [trim($first), trim($last)]); } function v3($str1, $str2) { return (strlen($str1) > 0 && strlen($str2) > 0) ? ($str1 + " " + $str2) : (strlen($str1) > 0) ? $str1 : $str2 ; } function v($first, $last) { echo v1($first, $last); echo PHP_EOL; echo v2($first, $last); echo PHP_EOL; echo v3($first, $last); } v('first', 'second');
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