How to remove specific content from a file in PHP?

2 years ago
Liam
1 minute

In PHP, you can remove specified content from a file using the following method:

  1. Read the contents of a file.
  2. replace characters in a string
  3. Write the contents to a file.

Here is a sample code:

$filename = 'example.txt'; // 要处理的文件名

$content = file_get_contents($filename); // 读取文件内容

$search = '要删除的内容'; // 要删除的内容

$updatedContent = str_replace($search, '', $content); // 替换要删除的内容为空字符串

file_put_contents($filename, $updatedContent); // 将修改后的内容写回文件

Please note that this method will completely remove all instances in the file that exactly match the content to be deleted. If you only want to remove a certain part of the file, you can use other string manipulation functions such as substr() or preg_replace() for more complex operations.

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