I'm getting the following error "PHP Warning: A non-numeric value encountered on line 11". The following code is for a pagination. I have tried everything I know, not sure what else to do. Any help is appreciated.
8 $rowsPerPage = 20;
9 if(isset($_GET['page'])){$pageNum = $_GET['page'];}
10 if(empty($pageNum)) {$pageNum = 1;}
11 $offset = ($pageNum - 1) * $rowsPerPage;
Something is not numeric (as obvious as that sounds, it is the error) and given you manually set all things to integer other than the GET value, try this:
$rowsPerPage = 20;
if (isset($_GET['page'])) {
$pageNum = (int) $_GET['page'];
}
if(empty($pageNum)) {
$pageNum = 1;
}
$offset = ($pageNum - 1) * $rowsPerPage;
Notice the cast to int for the GET param.
You could also just cast to int and PHP will default to integer 0 if it's not already int:
$pageNum = (int) $_GET['page'];
Couldn't help myself - you can also use a ternary to make your setting of the $pageNum cleaner (IMO):
$rowsPerPage = 20;
$pageNum = isset($_GET['page'])
? (int) $_GET['page']
: 1;
$offset = ($pageNum - 1) * $rowsPerPage;
Seems like $pageNum is non-numeric, i.e. string, try:
$offset = (intval($pageNum) - 1) * $rowsPerPage;
$pageNum is non-numeric, intval will convert it to zero. Subtracting 1 from 0 will give -1, and multiplying $rowsPerPage by -1 will give you a negative offset, probably not the desired outcome.If $_GET['page'] is non-numeric don't just convert it to an int to get rid of the warning. If it's non-numeric, converting it to a number will prevent the warning, but because non-numeric values will always be converted to zero, your pagination will never work.
If you want your pagination to work properly, you need to handle the warning by discovering why $_GET['page'] is non-numeric and fixing that. Use a debugger or var_dump($_GET['page'] to see what's actually in it. After you find that, you should be able to trace it back to whatever is making the request and correct the error there.
$_GET['page']is probably a string, cast it... or possibly a better approach:$pageNum = (int)!empty($_GET['page']) ? $_GET['page'] : 1;Warningis not anError...$pageNumcould be a string in line 11$_GET['page']must contain something non-numbery.