$arr = array("あ","い","う"); $str = implode(",", $arr); print($str);
$str = "'" .implode("','", $arr)."'"; print($str);
$str = 'apple orange pear banana'; $arr = explode(" ", $str); // 半角スペースで分割 print_r($arr);
$str = 'apple orange pear banana'; $arr = preg_split("/\s/", $str); print_r($arr);
$str = 'apple,orange pear banana;remon'; $arr = preg_split("/[,:;\n\s]/", $str); print_r($arr);