使用正則表達式從字符串中獲取所有單詞

Question

我需要可以從字符串中找到所有單詞的preg_match 。 例如：

$str = "string: hi, it is string.";

我想得到這個：

[0] => string
[1] => hi
[2] => it
[3] => is
[4] => string

我使用'/[az]+/ui' ，但是得到了：

[0] => string:
[1] => hi,
[2] => it
[3] => is
[4] => string.

Answer 1

您說的是preg_match() ，而是應該使用preg_match_all() ，這里不需要在正則表達式中使用u修飾符。

$str = "string: hi, it is string.";

preg_match_all('/[a-z]+/i', $str, $matches);
print_r($matches[0]);

產量

Array
(
    [0] => string
    [1] => hi
    [2] => it
    [3] => is
    [4] => string
)