分页第二页不显示

Question

Pagination works fine when I don't use the WHERE statement in my SELECT statement. For some reason as soon as I add additional requests in the SELECT statement, only the 1st pagination page works. So it seems like the variable data is lost after the first page is displayed. Below is some of the code:-

               <?php
                 include 'database.php';
                 include 'paginator.php';
                 $pdo = Database::connect();

                 $paginator = new Paginator();
                 $sql = "SELECT count(*) FROM customer_crm ";
                 $paginator->paginate($pdo->query($sql)->fetchColumn());

                 $query =  $_GET["query"];
                 if (isset($query))  {
                   ($_GET['query'])?('%'.$_GET['query'].'%'):'%';
                   $sql = "SELECT * FROM customer_crm WHERE firstname LIKE :query OR email LIKE :query OR telephone LIKE :query ";
                   } 
                else    {
                    $start = (($paginator->getCurrentPage()-1)*$paginator->itemsPerPage);
                    $length = ($paginator->itemsPerPage);   
                    //$sql = "SELECT * FROM customer_crm WHERE customer_group_id = $input OR date_followup= CURDATE() ORDER BY customer_group_id DESC limit $start, $length ";
                    $sql = "SELECT * FROM customer_crm ORDER BY date_followup DESC limit $start, $length ";
                    //$sql = "SELECT * FROM customer_crm WHERE customer_group_id = $input ORDER BY date_followup DESC limit $start, $length ";
                    }


                   $sth = $pdo->prepare($sql);
                   $sth->bindParam(':start',$start,PDO::PARAM_INT);
                   $sth->bindParam(':length',$length,PDO::PARAM_INT);
                   $sth->bindParam(':query',$query,PDO::PARAM_STR);
                   $sth->execute();



                   foreach ($sth->fetchAll(PDO::FETCH_ASSOC) as $row) {

Answer 1

Without knowing which Paginator are we talking about, I could only advise you to do something like

include 'database.php';
include 'paginator.php';
$pdo = Database::connect();
$paginator = new Paginator();

$query = (isset($_GET["query"]) && strlen($_GET["query"])>1)? '%'.$_GET["query"].'%':'%';

$countsql = "SELECT * FROM customer_crm WHERE firstname LIKE :query OR email LIKE :query OR telephone LIKE :query ";
$sthcount = $pdo->prepare($countsql);
$sthcount->bindParam(':query',$query,PDO::PARAM_STR);
$sthcount->execute();

$count=$sthcount->fetchColumn();
$paginator->paginate($count);

$start = (($paginator->getCurrentPage()-1)*$paginator->itemsPerPage);
$length = ($paginator->itemsPerPage); 

$sql = $countsql . ' ORDER BY date_followup DESC limit :start, :length ';

$sth = $pdo->prepare($sql);
$sth->bindParam(':start',$start,PDO::PARAM_INT);
$sth->bindParam(':length',$length,PDO::PARAM_INT);
$sth->bindParam(':query',$query,PDO::PARAM_STR);
$sth->execute();

See, you where making two mistakes here:

• getting your count value without considering the query. You should set the value of $query regardless of the existance of $_GET['query'] , and use it in your count query as well as your results query.

• binding parameters whose placeholders and values do not exist in the query you're executing. Make sure your results query contains :query , :start and :length or you will be binding more parameters than the query has.

You should also have wrapped your statements in try/catch blocks so you could debug what was happening.

try {
    $sth = $pdo->prepare($sql);
    $sth->bindParam(':start',$start,PDO::PARAM_INT);
    $sth->bindParam(':length',$length,PDO::PARAM_INT);
    $sth->bindParam(':query',$query,PDO::PARAM_STR);
    $sth->execute();
} catch(\PDOException $e) {
    die('Error in query: '. $e->getMessage());
}

That way you would have known that the query was failing because of Invalid parameter number: parameter was not defined

NOTE I have no clue about how your paginator will know about the current page, nor can I see where are you setting the itemsPerPage value.