File open modes in PHP - Mini Project: Build & Apply

File open modes

📖 Scenario: You are working on a simple PHP script to save and read notes from a text file. You will learn how to open files in different modes to write and read data.

🎯 Goal: Create a PHP script that writes a note to a file and then reads the content back using the correct file open modes.

📋 What You'll Learn

Create a variable with the filename 'notes.txt'.

Create a variable with the note text 'Remember to buy milk'.

Open the file in write mode to save the note.

Close the file after writing.

Open the file in read mode to read the note.

Print the content read from the file.

💡 Why This Matters

🌍 Real World

Saving and reading notes or logs in files is common in many applications like note-taking apps or logging systems.

💼 Career

Understanding file open modes is essential for backend developers who manage file input/output operations.

1

Create filename and note variables

Create a variable called filename and set it to the string 'notes.txt'. Create another variable called note and set it to the string 'Remember to buy milk'.

PHP

$filename = 'notes.txt';
$note = 'Remember to buy milk';
# Your code here

Need a hint?

Use = to assign the exact strings to the variables.

2

Open file in write mode

Use fopen with the variable $filename and the mode 'w' to open the file for writing. Store the result in a variable called $file.

PHP

$filename = 'notes.txt';
$note = 'Remember to buy milk';
$file = fopen($filename, 'w');
# Your code here

Need a hint?

Use fopen with mode 'w' to open the file for writing.

3

Write note and close file

Use fwrite to write the variable $note to the file stored in $file. Then use fclose to close the file.

PHP

$filename = 'notes.txt';
$note = 'Remember to buy milk';
$file = fopen($filename, 'w');
fwrite($file, $note);
fclose($file);
# Your code here

Need a hint?

Write the note to the file and then close it to save changes.

4

Read and print file content

Open the file again using fopen with mode 'r' and store it in $file. Use fread with filesize($filename) to read the content into $content. Close the file and then use echo to print $content.

PHP

$filename = 'notes.txt';
$note = 'Remember to buy milk';
$file = fopen($filename, 'w');
fwrite($file, $note);
fclose($file);
$file = fopen($filename, 'r');
$content = fread($file, filesize($filename));
fclose($file);
echo $content;
# Your code here

Need a hint?

Open the file in read mode, read all content, close the file, and print the content.