正则表达式 - 匹配所有内容并停止

Question

我正在尝试使用正则表达式将所有内容与关键短语进行匹配。基本上，它正在查看电子邮件，我希望它能在对话历史之前返回所有内容。

我一直在尝试使用(?:^|\W)From:(?:$|\W)([A-Z][a-z]*)[\s-]([A-Z][a-z]*)停在From: Dave Patel（在下面的示例中）并匹配之前的所有内容。

下面的示例文字，每当我搜索时，我只能返回前一行或两行。

This is just some test text.

Many thanks,

James Jones
Some company
51 made up street
The world

From: Dave Patel 
Sent: 08 December 2017 14:57
To: Clare Jones <Clare.Jones.com>; Paul Smith <paul.smith@company.com>
Subject: Re: Files

Well done!  Let me know when implemented if you want me to test.

From: Dave Patel 
Sent: 08 December 2017 14:57
To: Clare Jones <Clare.Jones.com>; Paul Smith <paul.smith@company.com>
Subject: Re: Files

The fox jumps over the lazy dog

Joseph Smith

一家公司 bla bla blaaaa

Answer 1

试试这个正则表达式

API\Response\MediaLikersResponse Object
(
    [httpResponse] => GuzzleHttp\Psr7\Response Object
        (
            [reasonPhrase:GuzzleHttp\Psr7\Response:private] => OK
            [statusCode:GuzzleHttp\Psr7\Response:private] => 200
            [headers:GuzzleHttp\Psr7\Response:private] => Array
                (
                    [Content-Type] => Array
                        (
                            [0] => application/json
                        )

                )

            [headerNames:GuzzleHttp\Psr7\Response:private] => Array
                (
                    [content-type] => Content-Type
                    [vary] => Vary
                    [cache-control] => Cache-Control
                    [pragma] => Pragma
                    [expires] => Expires
                    [content-language] => Content-Language
                    [date] => Date
                    [set-cookie] => Set-Cookie
                    [connection] => Connection
                    [x-encoded-content-encoding] => x-encoded-content-encoding
                    [x-encoded-content-length] => x-encoded-content-length
                )

            [protocol:GuzzleHttp\Psr7\Response:private] => 1.1
            [stream:GuzzleHttp\Psr7\Response:private] => GuzzleHttp\Psr7\Stream Object
                (
                    [stream:GuzzleHttp\Psr7\Stream:private] => Resource id #149
                    [size:GuzzleHttp\Psr7\Stream:private] => 0
                    [seekable:GuzzleHttp\Psr7\Stream:private] => 1
                    [readable:GuzzleHttp\Psr7\Stream:private] => 1
                    [writable:GuzzleHttp\Psr7\Stream:private] => 1
                    [uri:GuzzleHttp\Psr7\Stream:private] => php://temp
                    [customMetadata:GuzzleHttp\Psr7\Stream:private] => Array
                        (
                        )

                )

        )


    [_objectData:LazyJsonMapper\LazyJsonMapper:private] => Array
        (
            [users] => Array
                (
                    [0] => Array
                        (
                            [pk] => xxxx
                            [username] => x
                            [full_name] => x
                            [is_private] => 
                            [profile_pic_url] => x
                            [is_verified] => 
                        )

                    [1] => Array
                        (
                            [pk] => x
                            [username] => x
                            [full_name] => x
                            [is_private] => 1
                            [profile_pic_url] => x
                            [profile_pic_id] => x
                            [is_verified] => 
                        )

                    [2] => Array
                        (
                            [pk] => x
                            [username] => x
                            [full_name] => x
                            [is_private] => 1
                            [profile_pic_url] => x
                            [profile_pic_id] => x
                            [is_verified] => 
                        )


                )

            [user_count] => 2
            [status] => ok
        )

)

我认为这个正则表达式的结果中的第1组是您正在寻找的。

从您的示例中，第1组将是：

(.*?)From:(?:$|\W)([A-Z][a-z]*)[\s-]([A-Z][a-z]*)