PHP正则表达式不匹配右括号

Question

im using this regex to extract salaries from a file containing many different lines of text:

/(£|\€|GBP)\s*?(.)*?(pro-rata|\x28pro-rata\x29)/i

The test cases are like this:

"Relevant Quantity Surveying construction drawings Salary: £36,999 (pro-rata) in accordance with standard construction terms ..."

It matches:

• £36,999 pro-rata
• €36,999 pro-rata
• GBP 36,999 pro-rata

But all matches of parenthesized 'pro-rata' are missing the right parenthtisis - i.e :

£36,999 (pro-rata

any ideas what wrong with this???

Answer 1

I tried using

/(£|\€|GBP)\s*?(.)*?(pro-rata|\(pro-rata\))/i

and it works for me as expected.