How do I print all POST results when a form is submitted?

Question

I need to see all of the POST results that are submitted to the server for testing.

What would be an example of how I can create a new file to submit to that will echo out all of the fields which were submitted with that form?

It's dynamic, so some fields may have a name/ID of field1, field2, field3, etc.

The reason why some of the solutions suggested doesn't look neat is because they rely on newlines, but are interpreted as HTML in the browser. Simply add `echo "
";` before the var_dump() or print_r(). — kb., Feb 17 '12 at 17:36

Jared · Accepted Answer · 2012-02-17T17:35:57.350

215

All the values are stored in the $_POST collection

<?php print_r($_POST); ?>

or if you want something fancier that is easier to read use a foreach loop to loop through the $_POST collection and print the values.

<table>
<?php 


    foreach ($_POST as $key => $value) {
        echo "<tr>";
        echo "<td>";
        echo $key;
        echo "</td>";
        echo "<td>";
        echo $value;
        echo "</td>";
        echo "</tr>";
    }


?>
</table>

edited Feb 17 '12 at 17:35

answered Feb 17 '12 at 17:30

Jared

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Shouldn't that be $_REQUEST? (if not $_POST) – kb. Feb 17 '12 at 17:35
Meant for it to be $_POST. Had a similar script for $_SERVER variables that I grabbed but failed to make that small edit. Thanks. – Jared Feb 17 '12 at 17:36
Probably worth highlighting kb.'s comment under the answer, about simply puting `var_dump` or `print_r` output between HTML `
```
` tags.
```
– Skippy le Grand Gourou Oct 03 '15 at 14:51

score 24 · Answer 2 · edited Dec 01 '15 at 16:21

24

You could try var_dump:

var_dump($_POST)

edited Dec 01 '15 at 16:21

Peter Mortensen

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answered Feb 17 '12 at 17:27

Paco Valdez

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This works, but is there anyway to make it a bit neater? Such as a list going down the page that just says "Field ID: value"? – Zoolander Feb 17 '12 at 17:29
1
@Zoolander See kb.'s comment under the answer, about simply puting `var_dump` or `print_r` output between HTML `
```
` tags.
```
– Skippy le Grand Gourou Oct 03 '15 at 14:50
var_dump shorter and more clear – Lapenkov Vladimir Dec 29 '15 at 07:40

score 13 · Answer 3 · edited Dec 01 '15 at 16:22

13

Simply:

<?php
    print_r($_POST);

    //Or:
    foreach ($_POST as $key => $value)
        echo $key.'='.$value.'<br />';
?>

edited Dec 01 '15 at 16:22

Peter Mortensen

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answered Feb 17 '12 at 17:29

Nicolas

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score 9 · Answer 4 · edited Dec 01 '15 at 16:21

9

You may mean something like this:

<?php
    $output = var_export($_POST, true);
    error_log($output, 0, "/path/to/file.log");
?>

edited Dec 01 '15 at 16:21

Peter Mortensen

30,738
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answered Feb 17 '12 at 17:27

Poni

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$output = var_export($_POST, true); This is the best one, most of the time, echo it or write to file – Adamz Aug 29 '22 at 16:48

score 4 · Answer 5 · answered Feb 17 '12 at 17:28

4

You could use something as simple as this

<?php
   print_r($_POST);
?>

This would make it a bit more viewable:

<?php
   echo str_replace('  ', '&nbsp; ', nl2br(print_r($_POST, true)));
?>

answered Feb 17 '12 at 17:28

Vex

1,489
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20

score 4 · Answer 6 · edited Dec 01 '15 at 16:24

4

You can definitely use var_dump, but you mentioned you are in front-end development. I am sure you would know this, but just as a reminder, use Firefox's Firebug or Chrome's / Internet Explorer's developers tool and check for the post. Post goes through hearders, and you should be able to check it from there too.

edited Dec 01 '15 at 16:24

Peter Mortensen

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answered Feb 17 '12 at 17:37

user1074115

41
1

var_dump($_POST) didn't do anything for me - unlike $_GET. – FontFamily Jul 26 '21 at 21:51

score 2 · Answer 7 · edited Dec 01 '15 at 16:25

if (! function_exists('d'))
{
    // Debugger
    function d($var, $exit = 0)
    {
        // Only output on localhost
        if ($_SERVER['HTTP_HOST'] != 'localhost')
        {
            return;
        }

        echo "\n[degug_output_BEGIN]<pre>\n";
        echo var_export($var, 1);
        echo "\n</pre>[degug_output_END]\n";

        if ($exit)
            exit;
    }
}

// Call:
d($_POST);

Bonus: Check debug_backtrace() too add tracing to your debugging.

How do I print all POST results when a form is submitted?

7 Answers7

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