PCRE模式匹配验证包含多行正则表达式和linux中的数据模式的2个文件

I am new to PCRE pattern matching. Would like to know, that if I have a file containing different regex patterns, say file1 containing long list of multiline patterns. Another file, say file2 containing some lines of patterns from file1 (pattern data file).I am new to PCRE pattern matching. Would like t