How Can I Use Query String?

Question

1.00/5 (1 vote)

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querystring:

XML

<?php
echo'<html>';
echo'<body>';
$b='ascnalsnlasnlkmnaksl';
echo"<form method='post'action='querystring1.php?$b'>";
echo'<input type="text"name="txt1">';
echo'<input type="submit"name="sbm1">';
echo'</form>';
echo'</body>';
echo'</html>';
?>

querystring1:

PHP

<?php
if(isset($_POST['sbm1'])){
$a=$_POST['txt1'];
echo $a;
if(isset($_POST['b'])){
$u=$_POST['b'];
echo $u;
}
}
?>

how can i use from $b
in this page : querystring1
?????

Posted 7-Jun-14 8:33am

saeed rajabi

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Comments

Sergey Alexandrovich Kryukov 7-Jun-14 23:21pm

No, not the way you are trying. This would be simple but makes no sense. If you are already using POST, why not using post data instead of URI parameters? It's much safer, better for maintenance, etc. And you are not really parametrize anything, just trying to pass a constant.
—SA

2 solutions

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-06-07T17:31:00

The answer would be:
Suppose your URI is "querystring1.php?key=value" then $_REQUEST['key'] would return "value", or whatever is passed as a query parameter value.

If you don't want to leverage this standard "key=value" form of passing query parameters, you have to look at the URI of the HTTP request itself and interpret it the way you wish. In particular, the whole query string can be accessed as $_SERVER['QUERY_STRING']. For related detail of URI please see, for example: http://www.phpf1.com/tutorial/get-current-page-url.html[^].

But it would not make much sense — please see my comment to the question. By the way, one widely used method of passing data via a "POST" HTTP request which is not supposed to be modified by the user is using a hidden control with the value you want to pass. The value is passed the same way you passed, for example, "txt1" value.

—SA

Peter Leow · Accepted Answer · 2014-06-07T19:38:00

There are a number of way:
1. hidden field
on the querytstring.php:

$b='ascnalsnlasnlkmnaksl';
echo "<form method='post' action='querystring1.php'>";
echo '<input type="hidden" name="b" value="<?php echo $b ?>">';
echo '<input type="text" name="txt1">';
echo '<input type="submit" name="sbm1">';
echo '</input></input></input></form>';

on the querystring1.php:

$u=$_POST['b'];

2. URL parameter
on the querytstring.php:

$b='ascnalsnlasnlkmnaksl';
echo "<form method='post' action='querystring1.php?b=<?php echo $b ??>'>";
echo '<input type="text" name="txt1">';
echo '<input type="submit" name="sbm1">';
echo '</form>';

on the querystring1.php:

$u=$_GET['b'];

How Can I Use Query String?

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