PDOStatement :: execute（）：SQLSTATE [HY093]

Question

这里的代码。请帮我！！！非常感谢

警告：PDOStatement :: execute（）：SQLSTATE [HY093]：参数号无效：参数未定义

public function update($table, $data, $cond){
		$updateKeys = NULL;
		foreach ($data as $key => $value) {
			$updateKeys .= "$key=:$key";
		}
		$updateKeys = rtrim($updateKeys, ",");

		$sql = "UPDATE $table SET $updateKeys WHERE $cond";
		$stmt = $this->prepare($sql);
		foreach ($data as $key => $value) {
			$stmt->bindParam(":$key", $value);
		}
		return $stmt->execute();

	}

Answer 1

您需要在$updateKeys .= "$key=:$key,";中加上“，”。请使用

function update($table, $data, $cond){
        $updateKeys = NULL;
        foreach ($data as $key => $value) {
            $updateKeys .= "$key=:$key,";
        }

        $updateKeys = rtrim($updateKeys, ",");

        echo $sql = "UPDATE $table SET $updateKeys WHERE $cond";
        $stmt = $this->prepare($sql);
        foreach ($data as $key => $value) {
            $stmt->bindParam(":$key", $value);
        }
        return $stmt->execute();

    }