PREG_SPLIT_NO_EMPTY

PREG_SPLIT_NO_EMPTYなし

<?
$src = "abcdefg";
$dest = preg_split('//',$src);
print_r($dest);

Array
(
    [0] =>
    [1] => a
    [2] => b
    [3] => c
    [4] => d
    [5] => e
    [6] => f
    [7] => g
    [8] => 
)

頭とお尻に空文字列が入ってしまう。

PREG_SPLIT_NO_EMPTYあり

<?
$src = "abcdefg";
$dest = preg_split('//',$src,-1,PREG_SPLIT_NO_EMPTY);
print_r($dest);

Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => d
    [4] => e
    [5] => f
    [6] => g
)

頭とお尻に空文字列が入らない。