Invalid argument supplied for foreach

[JPark]

Warning: Noob Alert...

 

I am playing around with forms and functions and am getting an error.

 

Here's the form:

<form action="functions.php" method="post" >
<p>Pick one or more colors:</p>
<p><input name="colors[]" type="checkbox" value="red"> Red  |  
        <input name="colors[]" type="checkbox" value="orange"> Orange  |  
        <input name="colors[]" type="checkbox" value="yellow"> Yellow  |  
        <input name="colors[]" type="checkbox" value="green"> Green  |  
        <input name="colors[]" type="checkbox" value="blue"> Blue  |  
        <input name="colors[]" type="checkbox" value="indigo"> Indigo  |  
        <input name="colors[]" type="checkbox" value="violet"> Violet</p>
          <hr align="left" width="560">
<p><input type="reset" name="Reset" value="Clear">  
<input type="submit" name="Submit" value="Submit"></p>
</form>

 

and here's the php results page:

<form action="<?=$_SERVER['PHP_SELF'];?>" method="post"> 
  <tr> 
    <td colspan='2' style='background: #E5E5E5; padding:3px 10px;'> 
<p style='font-weight:bold; text-align:center;'>You
        are almost done...</p></td> 

  <tr> 
    <td colspan='2' style='background: #E5E5E5; border-bottom: 1px solid #000; padding:3px 10px;'> 
<input type="submit" value="ENTER" /></td> 
  </tr> 
  </table> 
</form> 
<?php
echo "<hr width='200px' align='left'>";
echo "<h4>My Function:</h4>";

$colors = $_POST['colors'];

function showColors(&$colors) {
foreach ($colors as $key => $value)
	{
		echo $key." ==> ".$value."    ";
	}
}

showColors($colors);
?> 

 

The first time I get the results page, I get my selected colors displayed no problem.  However, if I click Enter on the results page, I get

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\functions.php on line 87

 

What am I doing wrong?

 

Thanks!

 

Joe

[trq]

What am I doing wrong?

 

The question is, what are you trying to do? The ENTER botton on your results page submits an empty form back to itself.

[Hussam]

The second time you are hitting enter the $_POST array doesn't even exist, you are just refreshing the page.

 

put both pages you have on one single page and put a condition if the form is submitted or not and that will let you hit enter as much as you want!