我无法使用PDO将多条记录插入数据库。我可以成功添加单个记录，但是只要添加foreach循环，它就会失败。在阅读了许多关于此问题的其他SO问题之后，我相信我需要“绑定”我的变量，尽管我对正确的语法完全感到困惑。
这是我创建的原始函数：
<? function addToDatabase () {
//Get All Variables
$timestamp = date("Y-m-d H:i:s");
$schoolName = $_SESSION['schoolName'];
$schoolStreet = $_SESSION['schoolStreet'];
$schoolCity = $_SESSION['schoolCity'];
$schoolState = $_SESSION['schoolState'];
$schoolZip = $_SESSION['schoolZip'];
$schoolContactName = $_SESSION['schoolContactName'];
$schoolContactTitle = $_SESSION['schoolContactTitle'];
$schoolContactPhone = $_SESSION['schoolContactPhone'];
$schoolCsontactEmail = $_SESSION['schoolContactEmail'];
$inputMethod = $_SESSION['inputMethod'];
$studentDataArray = $_SESSION['studentDataArray'];
$studentFirstNameField = $_SESSION['studentFirstNameField'];
$studentLastNameField = $_SESSION['studentLastNameField'];
$studentStreetField = $_SESSION['studentStreetField'];
$studentCityField = $_SESSION['studentCityField'];
$studentStateField = $_SESSION['studentStateField'];
$studentZipcodeField = $_SESSION['studentZipcodeField'];
$studentDOBField = $_SESSION['studentDOBField'];
$studentGenderField = $_SESSION['studentGenderField'];
$studentGradeField = $_SESSION['studentGradeField'];
//Connnect to Database
$host = 'myHost';
$un = 'myUsername';
$pw = 'myPassword';
$db_name = 'myTable';
try {
$conn = new PDO("mysql:host=$host;dbname=$dbName", $un, $pw);
echo 'Connected to database<br>';
$sql = "INSERT INTO studentData (originallyAddedOn, inputMethod, studentFirst, studentLast, studentStreet, studentCity, studentState, studentZip, studentDOB, studentGender, studentGrade, schoolName, schoolStreet, schoolCity, schoolState, schoolZip, schoolContactName, schoolContactTitle, schoolContactEmail, schoolContactPhone) VALUES (:originallyAddedOn, :inputMethod, :studentFirst, :studentLast, :studentStreet, :studentCity, :studentState, :studentZip, :studentDOB, :studentGender, :studentGrade, :schoolName, :schoolStreet, :schoolCity, :schoolState, :schoolZip, :schoolContactName, :schoolContactTitle, :schoolContactEmail, :schoolContactPhone)";
foreach ($studentDataArray as $student){
$q = $conn->prepare($sql);
echo $student[$studentFirstNameField]."<br>";
$q->execute(array( ':originallyAddedOn'=>$timestamp,
':inputMethod'=>$inputMethod,
':studentFirst'=>$student[$studentFirstNameField],
':studentLast'=>$student[$studentLastNameField],
':studentStreet'=>$student[$studentStreetField],
':studentCity'=>$student[$studentCityField],
':studentState'=>$student[$studentStateField],
':studentZip'=>$student[$studentZipField],
':studentDOB'=>$student[$studentDOBField],
':studentGender'=>$student[$studentGenderField],
':studentGrade'=>$student[$studentGradeField],
':schoolName'=>$schoolName,
':schoolStreet'=>$schoolStreet,
':schoolCity'=>$schoolCity,
':schoolState'=>$schoolState,
':schoolZip'=>$schoolZip,
':schoolContactName'=>$schoolContactName,
':schoolContactTitle'=>$schoolContactTitle,
':schoolContactEmail'=>$schoolContactEmail,
':schoolContactPhone'=>$schoolContactPhone));
}
// close the database connection
$dbh = null;
}
catch(PDOException $e) {
echo $e->getMessage();
}
}
$studentDataArray看起来与此相似：
0 => //student 1
array
[0] => 'Joe' //First
[1] => 'Smith' //Last
[2] => '101 Main St' //Street
[3] => 'Boston' //City
[4] => 'MA' //State
[5] => '01234' //Zip
[6] => '2000-01-01' //Date of Birth
[7] => 'Male' //Gender
[8] => '12' //Grade
1 => //Student 2
array
[0] => 'Jane'
[1] => 'Smith'
[2] => '99 Main St'
[3] => 'Boston'
[4] => 'MA'
[5] => '01234'
[6] => '2000-02-02'
[7] => 'Female'
[8] => '10'
<小时/> 更新：对于那些感兴趣的人，这是我修复错误后的最终功能：
<? function addToDatabase ($dataArray) {
//Connnect to Database
$host = 'myHost';
$un = 'myUsername';
$pw = 'myPassword';
$db_name = 'myTable';
try {
$conn = new PDO("mysql:host=$host;dbname=$dbName", $un, $pw);
echo 'Connected to database<br>';
$sql = "INSERT INTO studentData (originallyAddedOn, inputMethod, studentFirst, studentLast, studentStreet, studentCity, studentState, studentZip, studentDOB, studentGender, studentGrade, schoolName, schoolStreet, schoolCity, schoolState, schoolZip, schoolContactName, schoolContactTitle, schoolContactEmail, schoolContactPhone) VALUES (:originallyAddedOn, :inputMethod, :studentFirst, :studentLast, :studentStreet, :studentCity, :studentState, :studentZip, :studentDOB, :studentGender, :studentGrade, :schoolName, :schoolStreet, :schoolCity, :schoolState, :schoolZip, :schoolContactName, :schoolContactTitle, :schoolContactEmail, :schoolContactPhone)";
$q = $conn->prepare($sql);
foreach ($dataArray as $student){
$a = array (':originallyAddedOn'=>$student['timestamp'],
':inputMethod'=>$student['inputMethod'],
':studentFirst'=>$student['studentFirst'],
':studentLast'=>$student['studentLast'],
':studentStreet'=>$student['studentStreet'],
':studentCity'=>$student['studentCity'],
':studentState'=>$student['studentState'],
':studentZip'=>$student['studentZip'],
':studentDOB'=>$student['studentDOB'],
':studentGender'=>$student['studentGender'],
':studentGrade'=>$student['studentGrade'],
':schoolName'=>$student['schoolName'],
':schoolStreet'=>$student['schoolStreet'],
':schoolCity'=>$student['schoolCity'],
':schoolState'=>$student['schoolState'],
':schoolZip'=>$student['schoolZip'],
':schoolContactName'=>$student['schoolContactName'],
':schoolContactTitle'=>$student['schoolContactTitle'],
':schoolContactEmail'=>$student['schoolContactEmail'],
':schoolContactPhone'=>$student['schoolContactPhone']);
if ($q->execute($a)) {
// Query succeeded.
} else {
// Query failed.
echo $q->errorCode();
}
// close the database connection
$dbh = null;
echo "Insert Complete!";
}
}
catch(PDOException $e) {
echo $e->getMessage();
}
}
答案 0 :(得分：7)
您不需要绑定变量。我以前用类似的代码完成了这个。虽然很难说什么出错了。你有例外 - 如果是的话是什么？
我唯一看错的是你在循环中做好准备......应该更像是：
try {
$conn = new PDO("mysql:host=$host;dbname=$dbName", $un, $pw);
echo 'Connected to database<br>';
$sql = "INSERT INTO studentData (originallyAddedOn, inputMethod, studentFirst, studentLast, studentStreet, studentCity, studentState, studentZip, studentDOB, studentGender, studentGrade, schoolName, schoolStreet, schoolCity, schoolState, schoolZip, schoolContactName, schoolContactTitle, schoolContactEmail, schoolContactPhone) VALUES (:originallyAddedOn, :inputMethod, :studentFirst, :studentLast, :studentStreet, :studentCity, :studentState, :studentZip, :studentDOB, :studentGender, :studentGrade, :schoolName, :schoolStreet, :schoolCity, :schoolState, :schoolZip, :schoolContactName, :schoolContactTitle, :schoolContactEmail, :schoolContactPhone)";
// prepare once... exceute many :-)
$q = $conn->prepare($sql);
foreach($studentDataArray as $student) {
$q->execute($yourDataArray);
// do other stuff if needed
}
} catch(PDOException $e) {
echo $e->getMessage();
}
答案 1 :(得分：2)
For循环，执行此操作（支持预准备语句的PDO或其他数据库客户端库）：
INSERT查询。利润。
对于数组的基于PDO的示例，其中数据要插入到需要名为option的单个列的表中。
首先要插入数据库的一些数据：
$options = [
['option' => "Insert Option A " . uniqid()],
['option' => "Insert Option B " . uniqid()],
['option' => "Insert Option C " . uniqid()],
];
在其他地方，让我们假设有$options数组并关心数据库交互。这需要一个连接：
$conn = new PDO('mysql:dbname=test;host=localhost', 'testuser', 'test');
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$conn->setAttribute(PDO::ATTR_EMULATE_PREPARES, FALSE);
现在让我们准备插入查询。像在问题中一样使用命名参数，确保这也适用于带编号的参数：
$stmt = $conn->prepare('INSERT INTO config (`OPTION`) VALUES (:OPTION);');
现在让我们在这里将命名参数绑定到变量。请注意，该变量带有前缀（此处为insert）。这实际上是输入数组中option键的别名：
$stmt->bindParam(':OPTION', $insert_option);
现在从上面的编号列表中，点1.）准备SQL INSERT查询。和2.）绑定变量。已经完成了。
只有左边是$options数组上的循环才能插入值：
foreach ($options as $insert) {
extract($insert, EXTR_PREFIX_ALL, 'insert');
$stmt->execute();
}
利用extract允许基于输入数组一次性设置多个变量，而不需要太多麻烦。
完整的例子：
$options = [
['option' => "Insert Option A " . uniqid()],
['option' => "Insert Option B " . uniqid()],
['option' => "Insert Option C " . uniqid()],
];
$conn = new PDO('mysql:dbname=test;host=localhost', 'testuser', 'test');
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$conn->setAttribute(PDO::ATTR_EMULATE_PREPARES, FALSE);
# 1. Prepare
$stmt = $conn->prepare('INSERT INTO config (`OPTION`) VALUES (:OPTION);');
# 2. Bind
$stmt->bindParam(':OPTION', $insert_option);
# 3. Loop & Execute
foreach ($options as $insert) {
extract($insert, EXTR_PREFIX_ALL, 'insert');
$stmt->execute();
}