You can append data into file by using a or a+ mode in fopen() function. Let’s see a simple example that appends data into data.txt file.

Let’s see the data of file first.

data.txt

welcome to php file write

PHP Append to File – fwrite()

The PHP fwrite() function is used to write and append data into file.

Example

 <?php  
$fp = fopen(‘data.txt’, ‘a’);//opens file in append mode  
fwrite($fp, ‘ this is additional text ‘);  
fwrite($fp, ‘appending data’);  
fclose($fp);  
  
echo “File appended successfully”;  
?>  

Output: data.txt

welcome to php file write this is additional text appending data