查找匹配与PHP或Perl

Question

结果，我有2个文件（大尺寸）

• name1.txt
• name2.txt

name1.txt：

smooth - temper 
left - corner 
etc. 

name 2.txt：

corner = hard 
temper = small 
etc. 

我怎样才能找到name1.txt比赛中name2.txt，比内name3.txt

输出name3.txt放置：

smooth - temper = small 
left - corner = hard 

Answer 1

我不知道下面将如何很好地执行大文件 - 测试文件与示例完全一样，但只要我正确解释模式，就会返回所需的结果。

 $names_1=__DIR__.'\names1.txt'; 
     $names_2=__DIR__.'\names2.txt'; 
     /* Read each source file into an array */ 
     $lines_1=file($names_1, FILE_TEXT | FILE_SKIP_EMPTY_LINES | FILE_IGNORE_NEW_LINES); 
     $lines_2=file($names_2, FILE_TEXT | FILE_SKIP_EMPTY_LINES | FILE_IGNORE_NEW_LINES); 

     /* placeholders */ 
     $arr_1=array(); 
     $arr_2=array(); 
     $arr_3=array(); 
     $arr_4=array(); 

     /* Populate $arr_1 using value as key */ 
     foreach($lines_1 as $index => $line){ 
      list($w1,$w2)=explode('-', str_replace(' ', '', $line)); 
      $arr_1[ $w2 ]=$w1; 
     } 

     /* populate arr_2 */ 
     foreach($lines_2 as $index => $line){ 
      list($w1,$w2)=explode('=', str_replace(' ', '', $line)); 
      $arr_2[ $w1 ]=$w2; 
     } 

     /* Find where there are common keys between the two arrays */ 
     $arr_3=array_intersect_key($arr_1, $arr_2); 

     /* populate output array in format expected */ 
     foreach($arr_3 as $i => $v){ 
      $arr_4[]=$arr_1[ $i ]. ' - '. $i .' = '.$arr_2[ $i ]; 
     } 

     /* show results */ 
     echo '<pre>',print_r($arr_4,true),'</pre>';