Show $_POST keys

[RopeADope]

How can you print an individual key in the $_POST array?

 

I've tried...

echo $_POST[0];

But with no luck.  There is data in the array, not all keys have values.

[Adam]

You can check what's in the $_POST array with var_dump or print_r. Then you just need to reference the key:

 

echo $_POST['key']);

[RopeADope]

You can check what's in the $_POST array with var_dump or print_r. Then you just need to reference the key:

 

echo $_POST['key']);

 

Is there any way to reference a key with an index number?  I'm trying to create a data processing script to handle a bunch of forms so I need to be able to reference $_POST keys without actually naming them.

[Adam]

Not if it's an associative array. You can loop through the post array and store them in a numerically indexed array though:

 

$array = array();

foreach ($_POST as $param)
{
    $array[] = $param;
}

[RopeADope]

Ah, excellent idea.  So with the code you've posted, for each loop through it will append a value to $array from $_POST, correct?

 

[Adam]

Yep. You'll end up with identical values, except the associative keys will be numeric. Just remember you do loose the name, so you'll have no idea what each value is.

[AbraCadaver]

Ah, excellent idea.  So with the code you've posted, for each loop through it will append a value to $array from $_POST, correct?

 

I don't like loops when they're not needed 

 

$array = array_values($_POST);

 

But I agree with MrAdam.  I don't see how losing the string indexes (names) is beneficial.  Probably a much better way to do what you're trying to do.