我想找到（如果它们存在）任何哈希标签，并获取每个标签的第一次共现以及它之后的文本，但如果存在另一个标签，则在下一个标签之前。
*并非所有消息字符串都带有哈希标签！
这是我正在尝试做的：
发送到脚本的可能字符串示例列表：
1）$message="添加了一些新东西";
2） $message = '#BALANCE X 的平衡运动';
3） $message ="#CHANGE 一些日志文本 #FIX 一些其他日志文本";
$num = prereg_match_all（'@?????@'， $message， $matches）;
这是我从比赛中获得的数组结构结果：
示例 1） 的结果）
(
[0] => Array
(
[0] => Added some new stuff
)
)
示例2的结果）
(
[0] => Array
(
[0] => balanced movement of X
[1] => #BALANCE
)
)
示例3的结果）
(
[0] => Array
(
[0] => some log text
[1] => #CHANGE
)
[1] => Array
(
[0] => some other log text
[1] => #FIX
)
)
事情让我发疯，试图在 REGEX 上找到像样的文档
试试这段代码：
$msg = '#CHANGE some log text #FIX some other log text';
$msg = preg_replace('/(#['w]+)('s+)/', "'n'n$1'n", $msg);
foreach (explode("'n'n", trim($msg)) as $k => $v) {
$res[$k] = array_reverse(explode("'n", $v));
}
print_r($res);
/*
Array
(
[0] => Array
(
[0] => some log text
[1] => #CHANGE
)
[1] => Array
(
[0] => some other log text
[1] => #FIX
)
)
*/
对所有测试用例尝试如下操作：
$messages[] = 'Added some new stuff';
$messages[] = '#BALANCE balanced movement of X';
$messages[] = '#CHANGE some log text #FIX some other log text';
foreach( $messages as $message) {
preg_match_all( '~(#'w+)?'s*(['w's]+)~i', $message, $matches);
// var_dump( $matches);
echo "Message: " . $message . "'n";
$count = strlen( $matches[1][0]);
if( $count == 0) {
// No hash tags
echo "No hash tags, so the match string text is: " . $matches[2][0] . "'n";
} else {
for( $i = 0; $i < count( $matches[1]); $i++) {
echo "'t Hash tag $i'n";
echo "'t't - Tag: ".$matches[1][$i]." Value: ".$matches[2][$i]."'n";
}
}
}
这输出：
Message: Added some new stuff
No hash tags, so the match string text is: Added some new stuff
Message: #BALANCE balanced movement of X
Hash tag 0
- Tag: #BALANCE Value: balanced movement of X
Message: #CHANGE some log text #FIX some other log text
Hash tag 0
- Tag: #CHANGE Value: some log text
Hash tag 1
- Tag: #FIX Value: some other log text
看它工作
我刚刚明白了！经过3个小时的战斗，BSDNOOBZ给出了最接近的答案......
给它以下情况：
$messages[] = 'Blla vajfkj asfhkha asfha lskahfa';
$messages[] = '#CHANGE reduced sentry health/armor to 325/100 and made them easier to repair with welders #FIX reduced sentry build time to 6 seconds (down from 10)';
foreach($messages AS $message)
{
$num = preg_match_all('@('#'w+)([^#]+)@', $message, $matches, PREG_SET_ORDER);
if($num > 0)
{
print_r($matches);
} else {
echo $message;
}
}
结果：
string Blla vajfkj asfhkha asfha lskahfa
Array (
[0] => Array
(
[0] => #CHANGE reduced sentry health/armor to 325/100 and made them easier to repair with welders
[1] => #CHANGE
[2] => reduced sentry health/armor to 325/100 and made them easier to repair with welders
)
[1] => Array
(
[0] => #FIX reduced sentry build time to 6 seconds (down from 10)
[1] => #FIX
[2] => reduced sentry build time to 6 seconds (down from 10)
)
)