PHP File Create / Write

📝 PHP File Create / Write Tutorial

PHP allows you to create new files and write data into them using built-in functions like fopen() and fwrite(). This is useful for storing logs, user input, or any dynamic data.

1️⃣ Create a New File

"w" mode: Write mode
- Creates the file if it doesn’t exist
- Overwrites the file if it already exists

2️⃣ Write Data to a File

<?php
$file = fopen("newfile.txt", "w") or die("Unable to open file!");

// Writing data
$text = "Hello, this is PHP file handling!\n";
fwrite($file, $text);

$text2 = "This is a second line.";
fwrite($file, $text2);

fclose($file);
echo "Data written to file successfully.";
?>

<?php

$file = fopen("newfile.txt", "w") or die("Unable to open file!");

// Writing data

$text = "Hello, this is PHP file handling!\n";

fwrite($file, $text);

$text2 = "This is a second line.";

fwrite($file, $text2);

fclose($file);

echo "Data written to file successfully.";

Output in newfile.txt:

3️⃣ Append Data to an Existing File

✅ "a" mode adds new content without overwriting existing content.

4️⃣ Using `file_put_contents()` (Shortcut)

You can create/write a file in a single step:

Overwrites existing content by default.
Use FILE_APPEND to append:

5️⃣ Key Points

Modes matter: "w" = write/overwrite, "a" = append
Always close the file after writing with fclose()
file_put_contents() is a simpler alternative
Ensure write permissions in the folder

🏁 Summary

fopen() + fwrite() → Create/write files
"w" → Overwrite or create file
"a" → Append to file
file_put_contents() → Shortcut for write/append
Always close files with fclose()

PHP File Create / Write