PHP write file from input to txt - issue

Question

I've been at this for a while and been through other options on stack but can't get this to work. (I'm pretty nooby, sorry!)

I have a form which i want to send data to my txt file but it's just not writing.

ANY help greatly appreciated, thank you!!

My HTML Form:

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>php test</title>
</head>

    <title></title>
</head>
<body>
        <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>
    <a href='/tmp/mydata.txt'>Text file</a>
</body>

And my PHP

<?php
if(isset($_POST['field1']) && isset($_POST['field2'])) {
    $data = $_POST['field1'] . '-' . $_POST['field2'] . "\n";
    $ret =  fwrite('/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');
}

Do you get any errors?

Sébastien
– Sébastien

2018-01-23 21:29:01 +00:00
Commented Jan 23, 2018 at 21:29 — Sébastien
– Sébastien, Commented Jan 23, 2018 at 21:29

DFriend · Accepted Answer · 2018-01-23 21:39:36Z

1

You need to open a file before you can write to it with fwrite().

$fp = fopen('/tmp/mydata.txt', 'w');
$ret = fwrite($fp, $data);
//and don't forget to close it
fclose($fp);
if($ret === false) { 
   ...

Based on the flags you use in the question I think the function you might be thinking of is file_put_contents (See Docs HERE) and not fwrite.

edited Jan 23, 2018 at 21:39

answered Jan 23, 2018 at 21:31

DFriend

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Comments

Pang · Accepted Answer · 2018-01-24 01:38:07Z

0

Try to add this line of code:

$myfile = fopen("/tmp/mydata.txt", "w") or die("Unable to open file!");

before the fwrite(), then you can now insert data/text in your file:

fwrite($myfile, $data);

edited Jan 24, 2018 at 1:38

Pang

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answered Jan 24, 2018 at 1:27

Dee

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