如何在文件中的“”中查找\n

如果文本的格式是固定的,也许你根本不需要正则表达式,只需扫描行中的两个双引号,如果只有一个双引号,开始连接行,直到找到结束的一行。。。

如果可以使用转义引号、单引号来分隔字符串等,可能会出现问题。但只要不存在这种情况,就可以了。

我不懂PHP,所以这里有一些伪代码:

open = False
for line in lines do
    nquotes = line.count("\"")
    if not open then
        if nquotes == 1 then
            open = True
            write(line)
        else #we assume nquotes == 2
            writeln(line)
        end
    else
        if nquotes == 0 then
            write(line)
        else #we assume nquotes == 1
            open = False
            writeln(line)
        end
    end
 end

下面是fortran在PHP中的基本答案

<pre>
<?php

$data = <<<DATA
1 (2) ,Yes,5823,"Some Name
801-555-5555",EXEC,,"Mar 16, 2009",0.00,
1 (3) ,,4821,Somebody Else,MBR,,"Mar 11, 2009",,0.00
2 (1) ,,5634,Another Guy,ASSOC,,"Mar 15, 2009",,0.00
DATA;

echo $data, '<hr>';

$lines = preg_split( "/\r\n?|\n/", $data );

$filtered = "";
$open = false;
foreach ( $lines as $line )
{

  if ( substr_count( $line, '"' ) & 1 && !$open )
  {
    $filtered .= $line;
    $open = true;
  } else {
    $filtered .= $line . "\n";
    $open = false;
  }
}

echo $filtered;
?>
</pre>