Question

我有一个正在构建的查询：

$filmQuery = "
  SELECT nfc_film.title, nfc_film.film_id, nfc_film.description, nfc_film.release_year, nfc_film.rating, nfc_film.last_update, nfc_category.name FROM nfc_film
      JOIN nfc_film_category
        ON nfc_film.film_id = nfc_film_category.film_id
      JOIN nfc_category
        ON nfc_film_category.category_id = nfc_category.category_id";

  if($search_term && $category){
    $filmQuery .= "
    WHERE
      nfc_film.title LIKE :searchterm
    AND
      nfc_category.name = :category";

  } else if ($search_term && !$category) {
    $filmQuery .= "
    WHERE
      nfc_film.title LIKE :searchterm";
  } else if (!$search_term && $category) {
    $filmQuery .= "
    WHERE
      nfc_category.name = :category";
  }

  $filmQuery .= "
    LIMIT 10
    OFFSET 0
      ";

这似乎正常工作，我检查了变量并在我的DBMS中运行了它。

因此，我随后绑定了Params（包括用于另一个查询的param绑定）：

  if($search_term != ''){
    $sqlGetFilms->bindParam(':searchterm', $sqlSearchTerm, PDO::PARAM_STR);
    $sqlCountFilms->bindParam(':searchterm', $sqlSearchTerm, PDO::PARAM_STR);
  }

  if($category != ''){
    $sqlGetFilms->bindParam(':category', $category, PDO::PARAM_STR);
    $sqlCountFilms->bindParam(':category', $category, PDO::PARAM_STR);
  }

  if($page != ''){
    $sqlGetFilms->bindParam(':page', $page, PDO::PARAM_INT);
  }

执行此命令时得到的结果无济于事。

当我删除bindParams并将查询中的参数替换为静态值时，查询将返回结果。

那么，为什么bindParams破坏了我的查询？

编辑：这些是1的SQL语句。否$search_term或category 2. $search_term和$category：

SELECT nfc_film.title, nfc_film.film_id, nfc_film.description, nfc_film.release_year, nfc_film.rating, nfc_film.last_update, nfc_category.name
    FROM nfc_film
  JOIN nfc_film_category
    ON nfc_film.film_id = nfc_film_category.film_id
  JOIN nfc_category
    ON nfc_film_category.category_id = nfc_category.category_id  LIMIT 10 OFFSET 0


SELECT nfc_film.title, nfc_film.film_id, nfc_film.description, nfc_film.release_year, nfc_film.rating, nfc_film.last_update, nfc_category.name
    FROM nfc_film
  JOIN nfc_film_category
    ON nfc_film.film_id = nfc_film_category.film_id
  JOIN nfc_category
    ON nfc_film_category.category_id = nfc_category.category_id 
    WHERE
      nfc_film.title LIKE :searchterm
    AND
      nfc_category.name = :category LIMIT 10 OFFSET 0

bindParam破坏了SQL查询

0 个答案: