如何使用php删除txt文件中的一行 [英] how to delete a single line in a txt file with php

问题描述

我想知道是否可以用php删除txt文件中的一行.

i was wondering if it is posible to delete a single line in a txt file with php.

我将电子邮件地址存储在名为databse-email.txt

I am storing emailadresses in a flat txt file named databse-email.txt

我使用以下代码:

<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
   $email = $_POST['email-subscribe'] . ',' . "\n";
   $store = file_put_contents('database-email.txt', $email, FILE_APPEND | LOCK_EX);
   if($store === false) {
     die('There was an error writing to this file');
   }
   else {
     echo "$email successfully added!";
   }
}

?>

表格:

<form action="" method="POST">
   <input name="email-subscribe" type="text" />
   <input type="submit" name="submit" value="Subscribe">
</form>

文件内容如下:

[e-mail],
[e-mail],
[e-mail],
[e-mail],
[e-mail],
[e-mail],
[e-mail],
[e-mail],

所有行均,分开

让我说我只想删除电子邮件地址:[e-mail]

Lets say i want to delete only the emailadres: [e-mail]

我该怎么做?

我要实现的是取消订阅表单并删除.txt文件中的一行

What i want to achieve is a unsubscribe form and delete a single line in the .txt file

推荐答案

您可以使用str_replace

$content = file_get_contents('database-email.txt');
$content = str_replace('[e-mail],', '', $content);
file_put_contents('database-email.txt', $content);

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