PHP $_POST emptying

I have a really strange problem here..

I have my form:

<form class="attach" name="attach" method="post" action="main.php">
    <label for="aurl">URL:</label>
    <input type="text" name="aurl" id="aurl" si开发者_运维百科ze="50"/>
    <input type="submit" id="submit" name="submit" value="Submit"/>
</form>

If I do print_r($_POST) I see it fine.

However, if I do, after the print_r:

if(!empty($_POST['aurl'])) {
     $url = $_POST['aurl'];

I can't use $_POST['aurl'] and print_r shows an empty array.

Any idea what could be going on here?

My full code: http://pastebin.com/Ayt1qCUY

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If $_POST['aurl'] has a value of 0, "0", or "", empty($_POST['aurl']) will return true. I prefer using isset($_POST['aurl']).

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you can use

echo"url:"; 
print_r($_POST['aurl']); 
die; 

to see what is in aurl and then use

if(isset($_POST['aurl'])) {
 $url = $_POST['aurl'];
}

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If you want to debug your POST and GET, please use print_r($_GET); and print_r($_POST); to see all POST and GET you can have in the actionpage ;-)

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It's better to use isset. If you want to check empty for a string, i recommend to use strlen. empty is problematic for some characters as hughes describes.