使用正则表达式从字符串中获取所有单词

Question

我需要可以从字符串中找到所有单词的preg_match 。 例如：

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

我想得到这个：

[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

您说的是preg_match() ，而是应该使用preg_match_all() ，这里不需要在正则表达式中使用u修饰符。

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

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

产量

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