PHP can work with files for logs, uploads, and configs.
  
  ## Read file
  
  ```php
  $content = file_get_contents("data.txt");
  echo $content;
  ```
  
  ## Write file
  
  ```php
  file_put_contents("log.txt", "Hello
", FILE_APPEND);
  ```
  
  ## Check if file exists
  
  ```php
  if (file_exists("data.txt")) {
    echo "Found";
  }
  ```
  
  ## Security tip
  
  Never allow users to choose file paths directly.
  
  > Next: Uploading files from forms.

Read from and write to files using PHP file functions safely.

File Handling in PHP

Learn PHP programming for server-side web development. Master PHP syntax, functions, and building dynamic websites.

File Handling in PHP

Read file

Write file

Check if file exists

Security tip

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PHP Object-Oriented Programming