使用正则表达式 PHP 将文本文件拆分为数组

Question

我在字符串中有一些更改日志文本，我想将每个更改日志条目拆分为一个数组。

这是变量中的更改日志文本示例 - $changelog_txt ：

version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

因此，生成的 output 将是一个如下所示的数组：

array(
    [0] => version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.
    [1] => version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.
)

任何人都可以提供帮助或提供任何建议吗？

Answer 1

您可以使用preg_split()来创建一个数组。

<?php
$str = <<<EOD
version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.
EOD;
$keywords = array_map('trim',preg_split("/^\s*$/m", $str));
print_r($keywords);
?>

工作演示： https://3v4l.org/1mpZH

正则表达式解释：

/^\s*$/m

^在行首断言 position

\s*匹配任何空白字符（等于[\r\n\t\f\v ] ）

*量词——在零次和无限次之间匹配，尽可能多次，根据需要回馈（贪婪）

$在行尾断言 position 全局模式标志

m修饰符：多行。 导致^和$匹配每行的开始/结束（不仅是字符串的开始/结束）

Answer 2

你可以 preg_replace_callback() 插入你自己的分隔符，然后explode()。

<?php
$oldString ='version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.';

$newString = preg_replace_callback('(version [0-9].[0-9].[0-9][0-9]?)', function($matches){return 'myUnlikelyDelimiter'.$matches[0];}, $oldString);

$array = explode('myUnlikelyDelimiter', $newString);

var_dump($array);
?>

Answer 3

<?php
$input_lines = <<<EOD
version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD         actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD  actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.
EOD;
preg_match_all('/(^[\s\S]*(?:\r*\n{2}))/U', $input_lines, $output_array);
print_r($output_array);

结果：

Array
(
    [0] => Array
        (
            [0] => version 4.4.6 ( updated 05-08-2020 )
                - Improved logic to keep collapse/expand state consistent for  Add/Clone/Delete/DnD actions in Layers panel.
                - Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
                - Improved the Visual Builder scroll performance.
                - Added vmin and vmax to css allowed units in module settings.


        )

    [1] => Array
        (
            [0] => version 4.4.6 ( updated 05-08-2020 )
                - Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
                - Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
                - Improved the Visual Builder scroll performance.
                - Added vmin and vmax to css allowed units in module settings.


        )

)