从正则表达式的字符串中获取所有单词

Question

我需要preg_match才能找到字符串中的所有单词。 例如：

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

我想得到这个：

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

我与'/[a-z]+/ui'一起使用，但我明白了：

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

Answer 1

你说preg_match()，而你应该使用preg_match_all()，而且你的正则表达式中不需要使用u修饰符。

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

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

输出

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