Pagination: How can I handle an error if the parameter is not passed in get request in php?

$pagenum=$_GET['pagenum'];

I have written a code for pagination in a single file. When I open the first time that page, it gives me an error. I think it is because parameter pagen开发者_JAVA百科um is not passed in GET request. How can i handle this?

Otherwise the code is running perfectly. But the issue is to handle that error when opening the page for the first time...

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you could write it something like this, to where if there is no page number specified it defaults to 1

$pagenum=isset($_GET['pagenum']) ? intval($_GET['pagenum']) : 1;

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PHP pages shouldn't break by not receiving a parameter. I'd check elsewhere. What error are you getting?

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If the variable is not set, simply display the first x number of records.

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if(!isset($_GET['pagenum']))
{
  $pagenum = '1';
}
else
{
  $pagenum = intval($_GET['pagenum']);
}

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try

$pagenum = 1;

if(isset($_GET['pagenum'])) {
  $pagenum = $_GET['pagenum'];
}