我的PHP MySQL语法太长了

Question

谢谢，非常好的解决方案，这已经回答了我的问题。 如果我的$ sql如下，我该如何使用你的解决方案：

$sql = "SELECT * FROM $tbl_main, $tbl_country, $tbl_members
WHERE ($tbl_main.country_id = $tbl_country.country_id) AND ($tbl_main.member_id = $theselect) ORDER BY $chosenTable.$orderby LIMIT $startpoint, $limit";

即。如何在代码中间的某处使用您的解决方案。

Answer 1

您可以有条件地连接额外条件：

$sql = "SELECT * FROM $tbl_main, $tbl_country, $tbl_members
WHERE ($tbl_main.country_id = $tbl_country.country_id)";

if(isset($theselect)) {
    $sql .= " AND ($tbl_main.member_id = $theselect)"; 
}

$sql .= " ORDER BY $chosenTable.$orderby LIMIT $startpoint, $limit";