条件
- 配列の要素を半角スペース区切りで出力する
- 末尾の要素は半角スペースでなく改行で出力する
1次元配列の場合
$array = ["red", "blue", "white"];
$space_separated = implode(" ", $array);
echo $space_separated . "\n";
多次元配列の場合
$array = ["red", ["blue", "gold", ["green", "pink"]], ["white", "brown"]];
$number_of_value = count($array, COUNT_RECURSIVE);
$count = 0;
echoWithHalfSpace($array, $number_of_value);
function echoWithHalfSpace($array, $number_of_value) {
global $count;
foreach ($array as $value) {
$count++;
if (is_array($value)) {
echoWithHalfSpace($value, $number_of_value);
} elseif ($number_of_value === $count) {
echo $value . "\n";
} else {
echo $value . " ";
}
}
}
もっとスマートな方法があるかも。