How to Write PHP Form Data to a TXT File?

How to Write Form Input to a TXT File with PHP

Are you trying to capture form input and save it to a TXT file using PHP? If you've encountered difficulties and a blank page, here's a detailed solution:

1. Form Structure:

The HTML form should have the correct "method" attribute:

<form action="myprocessingscript.php" method="POST">
    <input name="field1" type="text" />
    <input name="field2" type="text" />
    <input type="submit" name="submit" value="Save Data" />
</form>

2. PHP Script:

The PHP script uses the file_put_contents function to write to a TXT file:

<?php
if (isset($_POST['field1']) && isset($_POST['field2'])) {
    $data = $_POST['field1'] . '-' . $_POST['field2'] . "\r\n";
    $ret = file_put_contents('/tmp/mydata.txt', $data, FILE_APPEND | LOCK_EX);
    if ($ret === false) {
        die('There was an error writing this file');
    } else {
        echo "$ret bytes written to file";
    }
} else {
    die('no post data to process');
}

3. File Permissions:

Ensure that the PHP script has write permissions to the target directory, such as /tmp in the example.

4. Alternative Approach:

You can also use the fopen() , fwrite() , and fclose() functions:

<?php
$txt = "data.txt";
$fh = fopen($txt, 'w+');
if (isset($_POST['field1']) && isset($_POST['field2'])) {
   $txt=$_POST['field1'].' - '.$_POST['field2'];
   fwrite($fh,$txt."\n");
}
fclose($fh);

5. Additional Notes:

• We wrote to /tmp/mydata.txt because the current working directory in your example is unknown.
• file_put_contents is a preferred approach due to its simplicity.
• For further information, refer to the file_put_contents documentation.

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