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

More on PHP

PHP Introduction

Install PHP and Run Your First Script

PHP Syntax and Mixing with HTML