我只保存txt文件中的最后一个用户名而不是整个列表

问题描述：

The following code prints on screen a list of usernames. However on the fid.txt file, only the last one username is saved. What am I missing here?

foreach ($twitter_xml->channel->item as $key) {
$author = $key->guid;

preg_match("#http://twitter.com/([^\/]+)/statuses/.*#", $author, $matches);

print_r($matches[1]);

file_put_contents('fid.txt', $matches[1]);
}

以下代码在屏幕上显示用户名列表。但是在fid.txt文件中，只保存最后一个用户名。我在这里缺少什么？ p>

  foreach（$ twitter_xml-＆gt; channel-＆gt; item as $ key）{
 $ author = $ key-＆gt; guid; \  n 
 
epreg_match（“#http：//twitter.com/（[^ \ /] +）/statuses /。*＃”，$ author，$ matches）; 
 
print_r（$ matches [1]）; \  n 
file_put_contents（'fid.txt'，$ matches [1]）; 
} 
  code>  pre> 
  div>

答

file_put_contents overwrites the file by default. Change it to use append mode, and it'll probably do what you expect.

file_put_contents('fid.txt', "
" . $matches[1], FILE_APPEND); // also added a newline to break things up

Even better, you should append to the string, and only write to the file once:

$usernames = array();
foreach ($twitter_xml->channel->item as $key) {
    // ... stuff ...
    $usernames[] = $matches[1];
}
// Save everything, separated by newlines
file_put_contents('fid.txt', "
" . implode("
", $usernames), FILE_APPEND);

答

Unless you use the FILE_APPEND flag, file_put_contents() will open, write to, and close the file anew each time.

Try file_put_contents('fid.txt', $matches[1], FILE_APPEND);

答

You need to use file_put_contents('fid.txt', $matches[1], FILE_APPEND);

By default file_put_contents() overwrites the file each call.

答

file_put_contents('fid.txt', $matches[1], FILE_APPEND);

You are overwriting the whole file each time.

我只保存txt文件中的最后一个用户名而不是整个列表

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