HTML Forms in PHP

Question

i am writing html form code with in php script

here it is

<?php
 $problem_code="STR";
 echo '<form name="submit-button" action="/codejudge/submit.php?id='.$problem_code.'">';
 echo '<button type="submit" >Submit</button>';
 echo "</form>";
?>

But after submitting url look like this localhost/codejudge/submit.php ? but it should be like this localhost/codejudge/submit.php?id=STR

• Aycan Yaşıt: What if you set GET as action of form? <form method="get" name="submit-button" etc.
• Quentin: @AycanYaşıt — He has, that's the default.

Answer 1

If a form is method="GET" (which is the default), as this one is, then submitting it will erase the existing query string in the action.

Store the data in a hidden input instead.

<?php
 $problem_code="STR";
?>
<form name="submit-button" action="/codejudge/submit.php">
 <input type="hidden" name="id" value="<?php echo htmlspecialchars($problem_code); ?>">
 <button type="submit">Submit</button>
</form>

• Christian: This is the correct answer. You should put query variables inside hidden inputs, that's why they exist.

Answer 2

You should specify a method of form submit.

$problem_code="STR";
echo '<form method=post name="submit-button" action="/codejudge/submit.php?id='.$problem_code.'">';
echo '<button type="submit" >Submit</button>';
echo "</form>";