file

PHP File Handling

PHP allows you to read, write, and manipulate files on your server. Here are a few important functions:

Opening a File

To open a file, use the fopen() function:

      
        <?php
          $file = fopen("example.txt", "r");
          if ($file) {
            echo "File opened successfully.";
          } else {
            echo "Unable to open file.";
          }
        ?>

Reading from a File

To read the contents of a file, use fread():

      
        <?php
          $file = fopen("example.txt", "r");
          $content = fread($file, filesize("example.txt"));
          echo $content;
          fclose($file);
        ?>

Writing to a File

To write to a file, use fwrite():

      
        <?php
          $file = fopen("example.txt", "w");
          fwrite($file, "Hello, this is a test file.");
          fclose($file);
        ?>

Activity

Try It Yourself!

Create a script that opens a file, reads its contents, and writes new data to the file.

Quiz

Quick Quiz

What function is used to open a file in PHP?
How do you write to a file in PHP?

Answers: Use fopen() to open a file. Use fwrite() to write to a file.