Pagination for foreach loop - php

Question

I currently have a method inside my "car class" that display the car:
static function getCars(){
$autos = DB::query("SELECT * FROM automoviles");
$retorno = array();
foreach($autos as $a){
$automovil = automovil::fromDB($a->marca, $a->modelo, $a->version, $a->year, $a->usuario_id, $a->kilometraje, $a->info,
$a->hits, $a->cilindrada, $a->estado, $a->color, $a->categoria, $a->precio, $a->idAutomovil);
array_push($retorno, $automovil);
}
return $retorno;
}
In my index.php I call that function
foreach(car::getCars() as $a){
That allows me to display the info this way ( of course inside the foreach I have a huge code with the details I'll display.
Is there a way to implement a pagination to that thing so I can handle 8 cars per page, instead of showing all of them at the same page?

Answer 1

You can add a $limit and $page parameter on your function so that it will only return a maximum of $limit number of items starting from $limit * $page(or will call it the $offset). You also need to add a function to get the total number of rows you have for automoviles table.
static function getCars($page = 0, $limit = 8){
$offset = $limit * max(0, $page - 1);
//replace this with prepared statement
$autos = DB::query("SELECT * FROM automoviles LIMIT $offset, $limit");
$retorno = array();
foreach($autos as $a){
$automovil = automovil::fromDB($a->marca, $a->modelo, $a->version, $a->year, $a->usuario_id, $a->kilometraje, $a->info,
$a->hits, $a->cilindrada, $a->estado, $a->color, $a->categoria, $a->precio, $a->idAutomovil);
array_push($retorno, $automovil);
}
return $retorno;
}
static function getTotal()
{
//query to get total number of rows in automoviles table
}
In your index.php do this:
foreach(car::getCars((isset($_GET['page']) ? $_GET['page'] : 1)) as $a){
...
}
and add the pagination links.
$total = car::getTotal();
if($total > 8) {
for($i = 1; $i <= intval(ceil(1.0 * $total / $limit)); $i++) {
echo '' . $i . ';
}
}