我有一个文本文件，想要提取不透明的段落黑白，在PHP中有两个特殊行

debugcn 发表于 Dev

奥马尔·拉希德（Omar Rashid）

我有这段代码，想从两个特定行之间的文本文件中提取数据。我想提取这两行的黑白部分。TEXT文件示例在这里

---
 - ID: some random id

 \_______________________________\_
HELLO 
This is an example text.
I AM SECTION 1
\_______________________________\_
HELLO 
This is an example text.
I AM SECTION 2
\_______________________________\_
HELLO 
This is an example text.
I AM SECTION 3
\_______________________________\_
hello 
this is example text here
and i am section 4

在这里，我有一些与这些行匹配的代码，但是没有找到如何从文本文件中提取包括最后一节在内的每个节。

并需要这样的输出：

[0] => ' HELLO 
         This is an example text.
         I AM SECTION 1',
[1] => ' HELLO 
         This is an example text.
         I AM SECTION 2',
[2] => ' HELLO 
         This is an example text.
         I AM SECTION 3',
[3] => ' HELLO 
         This is an example text.
         I AM SECTION 4',


public static function find_section_in_file($file = '', $directory = '')
{
    $response = ['error' => true, 'section' => NULL];
    if (isset($file) && isset($directory)) {
        $handle = fopen($directory."\\".$file, "r");
        $section = [];
        if ($handle) {

            while (($line = fgets($handle)) !== false) {
                $new_line = trim(preg_replace('/\s+/', ' ', $line));
                $start = self::startsWith($new_line, '\__');
                $end = self::endsWith($new_line, '_\_');

                if ($start && $end){
                    array_push($section, $line);
                }
            }
            fclose($handle);
            $response = ['error' => false, 'section' => $section];

        }
        //need To write Query to save section in DB
    }
    return $response;
}

第四只鸟

您可以匹配所有不以反斜杠/下划线开头的行，并捕获捕获组1中的行。

^\h*\\_+\\_\R((?:.*\R(?!\h*\\_+\\_).*)*)

说明

^ 字符串开始
\h*\\_+\\_\R比赛0+水平空白字符，\，1个+下划线\，_和一个Unicode行序列
( 捕获组1
- (?: 非捕获组
  - .*\R 匹配整行和换行符
  - (?!\h*\\_+\\_) 负向超前，断言该行不是以反斜杠/下划线开头
  - .* 匹配整行匹配
- )* 关闭非捕获组并重复1次以上
) 关闭捕获组

正则表达式演示| PHP演示

例如

$re = '/^\h*\\\\_+\\\\_\R((?:.*\R(?!\h*\\\\_+\\\\_).*)*)/m';
$str = '---
 - ID: some random id

 \\_______________________________\\_
HELLO 
This is an example text.
I AM SECTION 1
\\_______________________________\\_
HELLO 
This is an example text.
I AM SECTION 2
\\_______________________________\\_
HELLO 
This is an example text.
I AM SECTION 3
\\_______________________________\\_
hello 
this is example text here
and i am section 4';

preg_match_all($re, $str, $matches);
print_r($matches[1]);

输出量

Array
(
    [0] => HELLO 
This is an example text.
I AM SECTION 1
    [1] => HELLO 
This is an example text.
I AM SECTION 2
    [2] => HELLO 
This is an example text.
I AM SECTION 3
    [3] => hello 
this is example text here
and i am section 4
)

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