store offline html form data in a csv file - php

Question

I'm looking for a simple solution to what is hopefully a simple problem. I want to have a laptop set up with an offline html file with a very short form that feeds a csv file. I've been eyeing the fputcsv() function to do this, but I'm not the most talented programmer. If I have a simple form that looks like this:
<?php
if(isset($_POST['submit']))
{
$myfile = fopen('file.csv', 'w');
fputcsv($myfile,
array($_POST['first-name'], $_POST['last-name'], $_POST['email']));
fclose($myfile);
}
?>
<article role="main">
<header role="banner">
<h1>Email Updates</h1>
</header>
<section>
<form id="form1" name="form1" method="post" action="<?=$_SERVER['PHP_SELF'];?>">
<input type="text" id="first-name" maxlength="100" autocorrect placeholder="First name" />
<input type="text" id="last-name" maxlength="100" autocorrect placeholder="Last name" />
<input type="text" id="email" maxlength="100" autocorrect placeholder="Email address" />
<button type="submit" id="submit" class="oneup">Submit</button>
</form>
</section>
</article>
what kind of code do I need to have it feed a simple csv file?

Answer 1

When (if) the form is submitted (correctly), do this:
if( $fp = fopen('file.csv', 'w') )
{
fputcsv($fp, $_POST);
}
fclose($fp);

Answer 2

When this form is submitted, it will populate the $_POST array.
So, you should add some PHP code that handles the submitted values.
For example:
<?php
if(isset($_POST['submit']))
{
$myfile = fopen('file.csv', 'w');
fputcsv($myfile,
array($_POST['first-name'], $_POST['last-name'], $_POST['email']));
fclose($myfile);
}
?>

Answer 3

Similar to djot's answer, I'd use this:
if( $fp = fopen('file.csv', 'w') ){
fputcsv($fp, print_r($_POST, true));
}
fclose($fp);
Note the print_r with the true flag, as this makes it more human readable.
If you actually wanted to write it as a CSV, just use:
$data = implode(',' $_POST);
if( $fp = fopen('file.csv', 'w') ){
fputcsv($fp, $data);
}
fclose($fp);