Question

我是php的新手，并准备了一些精子。我正在从键，值对的数组构建sql插入。下面的代码没有给出任何错误（在try / catch块中），也没有将数据添加到数据库中。怎么了？

try {
    // prepare sql and bind parameters
    echo "new device, add it to DB\n";
    $keys = implode(", ", array_keys($header));
    $values = implode(", ", array_values($header));
    var_dump($values);

    $placeHolders = str_repeat('?,', count($header));
    $placeHolders = substr($placeHolders, 0, -1); //remove the last comma

    $sql = "INSERT INTO device ($keys) VALUES ($placeHolders);";
    echo "sql: $sql\n";
    $stmt = $conn->prepare($sql);
    $stmt->execute($values);
    $stmt->debugDumpParams();
 } catch(PDOException $e) {
    echo "Error adding a new device. debugParams:\n";
    $stmt->debugDumpParams();
    echo "exception: " . $e->getMessage() . "\n";
    exit;
 }

当前输出为：

string(130) "608a242b, 7f019a0be51680cb0ecb1b627415c92a, 902b3438d2cf, whatever, 1.0, 1.0, A, 0000681c0ec2, OID_GENERIC, 1563290266, 1563290266"
sql: INSERT INTO device (deviceID, scannerID, scannerMAC1, scannerMAC2, scannerVer, scannerHwRev, scannerModel, upsMAC, snmpSet, firstSeem, lastSeen) VALUES (?,?,?,?,?,?,?,?,?,?,?);
SQL: [176] INSERT INTO device (deviceID, scannerID, scannerMAC1, scannerMAC2, scannerVer, scannerHwRev, scannerModel, upsMAC, snmpSet, firstSeem, lastSeen) VALUES (?,?,?,?,?,?,?,?,?,?,?);
Params:  0

，设备表为空（无行），看起来像这样：

+--------------+-------------+------+-----+-------------------+-----------------------------+
| Field        | Type        | Null | Key | Default           | Extra                       |
+--------------+-------------+------+-----+-------------------+-----------------------------+
| deviceID     | varchar(8)  | NO   | PRI | NULL              |                             |
| scannerID    | varchar(32) | NO   |     | NULL              |                             |
| scannerMAC1  | varchar(12) | NO   |     | NULL              |                             |
| scannerMAC2  | varchar(12) | YES  |     | NULL              |                             |
| scannerVer   | varchar(5)  | NO   |     | NULL              |                             |
| scannerHwRev | varchar(5)  | NO   |     | NULL              |                             |
| scannerModel | varchar(5)  | NO   |     | NULL              |                             |
| upsMAC       | varchar(12) | NO   |     | NULL              |                             |
| snmpSet      | varchar(30) | NO   |     | NULL              |                             |
| lastSeen     | timestamp   | NO   |     | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| firstSeen    | int(11)     | YES  |     | NULL              |                             |
+--------------+-------------+------+-----+-------------------+-----------------------------+
11 rows in set (0.00 sec)

PS：用户“不要惊慌”警告我，我应该在execute参数中使用数组。使用$ header作为参数执行，现在出现以下错误：

string(130) "608a242b, 7f019a0be51680cb0ecb1b627415c92a, 902b3438d2cf, whatever, 1.0, 1.0, A, 0000681c0ec2, OID_GENERIC, 1563292682, 1563292682"
sql: INSERT INTO device (deviceID, scannerID, scannerMAC1, scannerMAC2, scannerVer, scannerHwRev, scannerModel, upsMAC, snmpSet, firstSeem, lastSeen) VALUES (0);
Error adding a new device. debugParams:
SQL: [156] INSERT INTO device (deviceID, scannerID, scannerMAC1, scannerMAC2, scannerVer, scannerHwRev, scannerModel, upsMAC, snmpSet, firstSeem, lastSeen) VALUES (0);
Params:  11
Key: Name: [9] :deviceID
paramno=-1
name=[9] ":deviceID"
is_param=1
param_type=2
Key: Name: [10] :scannerID
paramno=-1
name=[10] ":scannerID"
is_param=1
param_type=2
Key: Name: [12] :scannerMAC1
paramno=-1
name=[12] ":scannerMAC1"
is_param=1
param_type=2
Key: Name: [12] :scannerMAC2
paramno=-1
name=[12] ":scannerMAC2"
is_param=1
param_type=2
Key: Name: [11] :scannerVer
paramno=-1
name=[11] ":scannerVer"
is_param=1
param_type=2
Key: Name: [13] :scannerHwRev
paramno=-1
name=[13] ":scannerHwRev"
is_param=1
param_type=2
Key: Name: [13] :scannerModel
paramno=-1
name=[13] ":scannerModel"
is_param=1
param_type=2
Key: Name: [7] :upsMAC
paramno=-1
name=[7] ":upsMAC"
is_param=1
param_type=2
Key: Name: [8] :snmpSet
paramno=-1
name=[8] ":snmpSet"
is_param=1
param_type=2
Key: Name: [10] :firstSeem
paramno=-1
name=[10] ":firstSeem"
is_param=1
param_type=2
Key: Name: [9] :lastSeen
paramno=-1
name=[9] ":lastSeen"
is_param=1
param_type=2
exception: SQLSTATE[21S01]: Insert value list does not match column list: 1136 Column count doesn't match value count at row 1

准备好的陈述不会出错也不会起作用

0 个答案: