过滤结果的正确方法是什么?到目前为止,我所得到的是可以输入名字,姓氏,电话和其他内容的表格。如何使语句忽略空的输入字段,而不是搜索空的值?
我使用的是预备语句,当我过滤内容时,我使用WHERE firstname = ? and lastname = ?
,如果某些内容为空,则条件更改语句。如何防止在有条件的情况下执行数百条语句?
$stmt = $this->mysqli->prepare("SELECT * FROM cust");
if(!empty($firstname) && !empty($lastname)) {
$stmt = $this->mysqli->prepare("SELECT * FROM cust WHERE as_first = ? AND as_last = ?");
$stmt->bind_param("ss", $firstname, $lastname);
} else if(!empty($firstname) && empty($lastname)) {
$stmt = $this->mysqli->prepare("SELECT * FROM cust WHERE as_first = ?");
$stmt->bind_param("s", $firstname);
} else if(empty($firstname) && !empty($lastname)) {
$stmt = $this->mysqli->prepare("SELECT * FROM cust WHERE as_last = ?");
$stmt->bind_param("s", $lastname);
}
答案 0 :(得分:2)
不幸的是,您应该编写自己的条件,例如:
$sql = 'SELECT...' // your original query
$sql .= !empty($phone) ? ' phone = :phone';
并手动绑定参数:
if (!empty($phone)) {
$stmt->bindParam(':phone', '%'.$phone.'%', PDO::PARAM_STR);
}