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【PHP】配列の要素を半角スペース区切りで出力する

Last updated at Posted at 2016-05-01

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。

##関連

【Ruby】配列の要素を半角スペース区切りで出力する

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