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Retrieving The Input When Submit is Clicked

Now we will add a simple condition to the beginning of our previous example.  If the user clicked the submit button then print out the name that was entered in the text field; otherwise, we display the HTML form again.

Because the action in the form points to input.php3 our script will be called again when the user clicks submit.

PHP Code:

<?php

if ($submit == "click"){
  echo "Hello, $UserName";
}
else{
  echo '
  <html><body>

  <form method="post" action="input.php3">

  Enter Your Name
  <input type="text" name="UserName"></input><br>

  <input type="submit" name="submit" value="click"></input>

  </form>

  </body></html>
  ';
}

?>

When a form is submitted, all HTML variables are passed to a PHP script and assigned their respective variable names.   In our example, the input text field is named "UserName" so when the form is submitted $UserName will hold the value.  The variable $submit, that corresponds to the input name="submit", will hold the value "click".  It is only set if we click the submit button and not when we directly access input.php3 with our browser.
 

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