如何將文本文件中的數字與PHP一起添加？

Question

我現在有一個文本文件，它看起來像這樣：

Test1 = 120827 = December 23, 2012: 
Test2 = 147203 = December 23, 2012: 
Test3 = 11806 = December 23, 2012: 
Test4 = 11806 = December 23, 2012: 
Test5 = 0 = December 23, 2012: 

我想要做什麼，是添加所有的數字在第二列在一起。我怎樣才能用PHP做到這一點？我的實際文件比這個大得多。

Test1 = *120827 = December 23, 2012: 
Test2 = *147203 = December 23, 2012: 
Test3 = *11806 = December 23, 2012: 
Test4 = *11806 = December 23, 2012: 
Test5 = *0 = December 23, 2012: 

*我想補充什麼。

任何幫助將不勝感激！謝謝！

Answer 1

<?php 
$pattern = '/(?<=\=\s)([0-9]+)(?=\s\=)/'; 
$total = 0; 
$matches; 
$filename = "add.txt"; 
$handle = @fopen($filename, "r"); 

if ($handle) { 
    while (($buffer = fgets($handle, 4096)) !== false) {   
     if(preg_match($pattern, $buffer, $matches)) 
     { 
      $total += intval($matches[0]); 
     }  
    } 
    if (!feof($handle)) { 
     echo "Error: unexpected fgets() fail\n"; 
    } 
    fclose($handle); 
} 

?> 

Answer 2

PHP：

$sum = 0; 
foreach (file($filename) as $line) { 
    list(,,$num) = explode(' ', $line); 
    $sum += $num; 
} 

如果文件過大，使用fopen + fgets，而不是file。

BASH：

cut -d' ' -f3 filename | paste -sd+ | bc