avoiding empty input

WesleyA · February 22, 2016

Hi there

I need to avoid empty input whlie using checkdnsrr A

I made a function called empty_char but it doesnt work.

the purpose of empty_char is to have an empty input being replaced by an x.

But something is not good so I can use some help.

Why isnt the value after using empty_char transmitted to the checkdnsrr part?

I show you my test set up as an example:

    <html><center><br><br>
    <form>
    <input type="text" name="webadres" > <br>
    <input type="submit" value="send"><br><br><br>
        </form>

     <?php
	        if ($_SERVER['REQUEST_METHOD'] === 'GET') 	{ 
		
				if (isset($_GET['webadres'])){ 
    
					echo 'this is your input : ';
						echo $_GET['webadres'];

    echo "<br><br>";

    $_GET['webadres'] = empty_char($_GET['webadres']);

    echo '<br><br><br>input after empty_var filter to avoid empty input : ' . $_GET['webadres'];

    $recordexists2 = checkdnsrr($_GET['webadres'], "A");
    if ($recordexists2) {
     echo $_GET['webadres'] . "<br><br>is an existing domain and topleveldomain <br>";
     }
     else
     {
		echo $_GET['webadres']; 
        echo '<br>please type in a valid domain ... <br> so onlythe domain and tld but no subdomain      <br><br>';
       }

     }
			}

	
	
	function empty_char($url)
                           { 
     if ($url == '' ) 
     {
	$url=='x';
    } 
    else 
    { $url == $url; 

     }
     echo 'function output of the var_dump $url : ';
     var_dump($url);
						   }
	
     ?>
    </center>
    </html>

dsonesuk · February 22, 2016

Single = is used to set a value, '==' or ===' are used to compare values.

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avoiding empty input

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