用什么分裂我的字符串'preg_split`

Question

这是我的原字符串： -

$data = "<br /> 
Q.156) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 

<br /> 
Q.157) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
<br /> 
Q.158) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
<br /> 
Q.159) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
<br /> 
Q.160) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
<br /> 
Q.161) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
<br /> 
Q.162) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: <br /> 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department <br /> 
"; 

我想我的字符串分割为数组中此格式

Array (
[0] => Q.156) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[1] => Q.157) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[2] => Q.158) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[3] => Q.159) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[4] => Q.160) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[5] => Q.161) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 

[6] => Q.162) Direction (156–160): Study the given pie-charts carefully to answer the questions that follow: 
Breaking up :- Number of Employees working in Different Departments of an Organisation, the Number of Males and the Number of Employees Who Recently Got Promoted in Each Department 
) 

我知道我可以使用preg_split('/[Q[.]]+/', $data)

但是我在正则表达式方面有点弱。 请帮我我的正则表达式合并相应..

Answer 1

我认为preg_match_all将是一个更好的功能，因为你想匹配每一行。

preg_match_all('/Q\.\d+.*/', $data, $matches); 
print_r($matches[0]); 

演示：https://3v4l.org/pWs6c

你的正则表达式是看起来有点过于宽松，[Q[.]]+是创建一个字符类，允许Q，[，或.。 ]然后试图匹配超过1次，因为]是文字字符。您可以使用自己的[.]来匹配单个期间，或\.是相同的。

\d是一个数字。
.*允许零个或多个任意字符，不包括新行，因此可以捕获每个问题行。

如果你还需要拖尾行，你可以使用这个修改后的正则表达式。

/(Q\.\d+.*?)(?:(?:<br \/>|\n){3}|$)/ 

演示：https://regex101.com/r/Joo8wt/1/

此方法使用s修改使.延伸。