Question

我有以下文字，如果只包含preg_match_all和{{1，我想{ }和a-zA-Z0-9内的内容: }}

some text,{SOMETHING21} {SOMETHI32NG:MORE}some msdf{TEXT:GET:2}sdfssdf sdf sdf

我正在尝试匹配{SOMETHING21} {SOMETHI32NG:MORE} {TEXT:GET:2}标签中可能有多个:。

我目前拥有的是：

preg_match_all('/\{([a-zA-Z0-9\-]+)(\:([a-zA-Z0-9\-]+))*\}/', $from, $matches, PREG_SET_ORDER);

它符合{SOMETHING21}和{SOMETHI32NG:MORE}的预期效果，但对于{TEXT:GET:2}，它仅匹配TEXT和2

因此它只匹配标记中的第一个和最后一个单词，并将中间单词留在$matches数组之外。这是否可能，或者我应该匹配它们然后在:上爆炸？

- 编辑 -

问题不在于我是否可以获得标签，问题是我是否可以将它们分组而不必再次爆炸结果。即使我当前的正则表达式找到了所有结果，子模式也不会返回$matches中的所有匹配项。

我希望以下内容能更好地澄清它：

\{                              // the match has to start with {
([a-zA-Z0-9\-]+)                // after the { the match needs to have alphanum consisting out of 1 or more characters
(
    \:                          // if we have : it should be followed by alphanum consisting out of 1 or more characters
    ([a-zA-Z0-9\-]+)            // <---- !! this is what it is about !! even though this subexpression is between brackets it is not put into $matches if more then one of these is found
)*                              // there could be none or more of the previous subexpression
\}                              // the match has to end with }

Answer 1

您无法获取捕获组的所有匹配值，只能得到最后一个。

所以你必须匹配模式：

preg_match_all('/{([a-z\d-]+(?::[a-z\d-]+)*)}/i', $from, $matches);

然后将$matches[1]上的每个元素拆分为:。

Answer 2

我使用非捕获分组来消除内部组，并且只捕获外部完整的冒号分隔列表。

$from = "some text,{SOMETHING21} {SOMETHI32NG:MORE}some msdf{TEXT:GET:2}sdfssdf sdf sdf";
preg_match_all('/\{((?:[a-zA-Z0-9\-]+)(?:\:(?:[a-zA-Z0-9\-]+))*)\}/', $from, $matches, PREG_SET_ORDER);
print_r($matches);

结果：

Array
(
    [0] => Array
    (
        [0] => {SOMETHING21}
        [1] => SOMETHING21
    )

    [1] => Array
    (
        [0] => {SOMETHI32NG:MORE}
        [1] => SOMETHI32NG:MORE
    )

    [2] => Array
    (
        [0] => {TEXT:GET:2}
        [1] => TEXT:GET:2
    )

)

Answer 3

也许我不理解这个要求，但是......

preg_match_all('/{[A-Za-z0-9:-]+}/', $from, $matches, PREG_PATTERN_ORDER);

结果：

Array
(
    [0] => Array
        (
            [0] => {SOMETHING21}
            [1] => {SOMETHI32NG:MORE}
            [2] => {TEXT:GET:2}
        )
)

正则表达式在模式内重复

3 个答案: