PHP | Get input name through $_POST[]

Question

HTML example:

Answer 1

Loop your object/array with foreach:

foreach($_POST as $key => $items) {
    echo $key . "<br />";
}

Or you can use var_dump or print_r to debug large variables like arrays or objects:

echo '<pre>' . print_r($_POST, true) . '</pre>';

Or

echo '<pre>';
var_dump($_POST);
echo '</pre>';

Answer 2

Nice neat way to see the form names that are, or will be submitted

<?php
$i=1;
foreach ($_POST as $name => $value) {
echo "</b><p>".$i." ".$name; 
echo " = <b>".$value; 
$i++;
}
?>

Just send your form to this script and it will show you what is being submitted.

Answer 3

You can process $_POST in foreach loop to get both names and their values, like this:

foreach ($_POST as $name => $value) {
   echo $name; // email, for example
   echo $value; // the same as echo $_POST['email'], in this case
}

But you're not able to fetch the name of property from $_POST['email'] value - it's a simple string, and it does not store its "origin".

Answer 4

If you wanted to do it dynamically though, you could do it like this:

foreach ($_POST as $key => $value)
{
    echo 'Name: ', $key, "\nValue: ", $value, "\n"; 
}

Answer 5

Actually I found something that might work for you, have a look at this-

http://php.net/manual/en/function.key.php

This page says that the code below,

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

// this cycle echoes all associative array
// key where value equals "apple"
while ($fruit_name = current($array)) {
    if ($fruit_name == 'apple') {
        echo key($array).'<br />';
    }
    next($array);
}
?>

would give you the output,

fruit1
fruit4
fruit5

As simple as that.

Answer 6

current(array_keys($_POST)) should give you what you are looking for. Haven't tested though.