$_REQUEST AND QUERY STRING IN PHP

$_REQUEST – By using this super global variable, we can get posted values of get and post method. We can also get values of cookie and Query string.

Query String – It is a small amount of data on URL address followed by ? symbol. Along with form data, if we want to transfer some extra information from one page to another page at the time of redirection we can use query string. Query string can be passed in two ways –

1. Query string as name and value.

2. Query string with only value.

Note – Using $_REQUEST, we can get value of query string if it is a combination of name and value.

Example –

form.html

<a href="p1.php?empno=1001&empname=Larry">Click</a>

p1.php

<?php

echo $_REQUEST['empno']."<br>";

echo $_REQUEST['empname'];

?>

Output –

1001

Larry

Example –

form.html

<form method="get" action="p1.php">

Text1 <input type="text" name="t1"><br>

Text2 <input type="text" name="t2"><br>

<input type="submit" name="Sub" value="Click">

</form>

p1.php

<?php

echo $_REQUEST['t1']."<br>";

echo $_REQUEST['t2'];

?>

Example –

form.html

<form method="post" action="p1.php">

Text1 <input type="text" name="t1"><br>

Text2 <input type="text" name="t2"><br>

<input type="submit" name="Sub" value="Click">

</form>

p1.php

<?php

echo $_REQUEST['t1']."<br>";

echo $_REQUEST['t2'];

?>

Example –

form.html

<a href="p1.php?iname=tr.jpg">

<img src="tr.jpg" width="100px"></a>

<a href="p1.php?iname=saradnja.png">

<img src="saradnja.png" width="100px"></a>

p1.php

<?php

echo $_REQUEST['iname']."<br>";

$inm=$_REQUEST['iname'];

echo "<img src='$inm' width='100px'>";

?>