What is the best approach to allow a user to modify their specific entry in a text file using PHP?

To allow a user to modify their specific entry in a text file using PHP, you can create a form where the user can input the new data they want to replace the existing entry with. You can then use PHP to read the file, find the specific entry the user wants to modify, replace it with the new data, and then write the updated content back to the file. 

<?php
// Read the content of the text file
$file = 'data.txt';
$content = file_get_contents($file);

// Find and replace the specific entry based on user input
$specific_entry = $_POST['specific_entry']; // assuming this is the identifier for the entry
$new_data = $_POST['new_data']; // new data input by the user
$content = str_replace($specific_entry, $new_data, $content);

// Write the updated content back to the file
file_put_contents($file, $content);

echo 'Entry modified successfully.';
?>

Keywords

file handling user input fopen fwrite fclose

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