Question

I face a problem whenever the user tries to browse to second page via $_GET if they have submitted $_POST data.

if(!isset($_POST['submit'])) {
//search input box
}
else {
//search details output
//pagination code
}

Whenever user press page 2, it shows //search input box back.

I want search to show page 2 and not //search input box back.

Answer 1

As @Alan says… page 2 isn’t receiving POST data, so submit is not set and it thinks the starting form should be shown again. A second GET variable (eg page) to track the results-page, will allow all three pages (start, page1+submit, page2)

if (isset($_REQUEST["page"])) {
    //No data received, but reviewing & page-display code should go here
} elseif (isset($_POST["submit"])) {    
    //POST-processing code goes here
    // Page-switching URL should be something like:
    // <a href="results.php?page=2">Page 2</a>  
} else {
    //Nothing posted, not paging - show input
    //search input box
}

Don’t forget to store your POST data somewhere temporarily so that you have data to display on the pages.