我如何使这个php脚本向data.txt添加一行或使其写入不同的文件

Question

我有一个php脚本用于用户输入，现在我希望这个脚本"添加到现有文件data.txt(首选("或为每个答案制作一个单独的文件，名为$field1

<?php
$txt = "data.txt";
$fh = fopen($txt, 'w+');
if (isset($_POST['field1']) && isset($_POST['field2'])) { // check if both fields are set
$txt=$_POST['field1'].' - '.$_POST['field2'];
file_put_contents('data.txt',$txt."n",FILE_APPEND); //log to data.txt
exit();
}
fwrite($fh,$txt); // write information to the file
fclose($fh); // close the file
?>

这是网站上的一个表格，必须写

"Name - Vote"
"Name - Vote"
"Name - Vote"

现在它覆盖文件，而不是添加

Answer 1

@Eric：阅读插入到解析代码中的注释

<?php
$txt = "data.txt";
$fh = fopen($txt, 'a'); // the correct open flag for append end of file
if (isset($_POST['field1']) && isset($_POST['field2'])) { // check if both fields are set
$txt=$_POST['field1'].' - '.$_POST['field2'];
fwrite($fh, $txt . "n"); // carriage return added (*assumption needed)
// exit(); // omit
}
// fwrite($fh,$txt); // write information to the file // pointless, redundant
fclose($fh); // close the file
?>