将PReg_match与子模式一起使用时,始终返回具有相同数据的双键数组,一个具有子模式名称,另一个使用数字标记.因为我匹配成千上万行每行几千字节,我担心数字数组会占用额外的内存.有没有正确的方法来禁用数字标签数组返回？

例：

<?PHP

header('Content-tyPE: text/plain');

$data = <<<START
I go to school.
He goes to funeral.
START;
preg_match_all('@^(?<who>.*?) go(es)* to (?<place>.*?)$@m',$data,$matches);
print_r($matches);

?>

输出：

Array
(
    [0] => Array
        (
            [0] => I go to school.
            [1] => He goes to funeral.
        )

    [who] => Array
        (
            [0] => I
            [1] => He
        )

    [1] => Array
        (
            [0] => I
            [1] => He
        )

    [2] => Array
        (
            [0] => 
            [1] => es
        )

    [place] => Array
        (
            [0] => school.
            [1] => funeral.
        )

    [3] => Array
        (
            [0] => school.
            [1] => funeral.
        )

)

preg_match_all('@^(?<who>.*?) go(?:es)? to (?<place>.*?)$@m',$matches);