[英]PDO UPDATE array using php mysql
您好,我正在嘗試編寫代碼來更新或編輯調查答案和每個答案的注釋,但是當我執行提交表單的功能時,它沒有將任何值保存到數據庫中。 我該如何解決?
我是PDO的新手。
提前致謝。
數據庫結構
"Questions" (idquestion, question)
"Surveys" (idsurvey, idquestion, answers, comments_per_question, survey_number)
更新功能
public function ModifySurveyMulti($answer = array())
{
if(!empty($answer)) {
foreach($answer as $questi => $value ) {
$this->MyDB->Write("UPDATE survey SET(
`idquestion` = '".$questi."',
`answers` = '".$value[0]."',
`comments_per_answer`= '".$_POST["comment"][$questi]."')");
}
}
}
modify_surveyform.php
<th><?php echo $row["questions"];?></th>
<td>
<input type = "text"
name = "answer[<?php echo $row['idquestion'];?>][]"
value = "<?php echo $row["answers"];?>">
</input>
</td>
<td>
<Textarea type = "text"
name = "comment[<?php echo $row['idquestion'];?>]"
cols = "50" rows = "3"/> <?php echo $row["comment"];?
</textarea>
</td>
</tr><?php } ?>
Mydbconnect.php
<?php
// I'm adding my PDO database because yours is deprecated
class DBConnect
{
public $con;
// Create a default database element
public function __construct($host = '',$db = '',$user = '',$pass = '')
{
try {
$this->con = new PDO("mysql:host=$host;
dbname=$db",$user,
$pass, array(
PDO::ATTR_ERRMODE
=> PDO::ERRMODE_WARNING
)
);
}
catch (Exception $e) {
return 0;
}
}
// Simple fetch and return method
public function Fetch($_sql)
{
$query = $this->con->prepare($_sql);
$query->execute();
if($query->rowCount() > 0) {
while($array = $query->fetch(PDO::FETCH_ASSOC)) {
$rows[] = $array;
}
}
return (isset($rows) && $rows !== 0 && !empty($rows))? $rows: 0;
}
// Simple write to db method
public function Write($_sql)
{
$query = $this->con->prepare($_sql);
$query->execute();
}
}?>
您需要做的幾件事:
UPDATE survey SET(`answers`= ?,`comments_per_answer`= ?) WHERE idquestion = ?
您將需要調整班級以僅創建連接
class DBConnect
{
public $con;
public function __construct($host = '',$db = '',$user = '',$pass = '')
{
try {
$this->con = new PDO(
"mysql:host=$host;dbname=$db",
$user,$pass,
array(PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING)
);
}
catch (Exception $e) {
die($e);
}
}
public function get_connection(){
return $this->con;
}
}
這樣您就可以像這樣創建它:
$db = new DBConnect(/*pass arguments here*/);
$this->MyDB = $db->get_connection();
修改並在您的函數中使用它:
public function ModifySurveyMulti($answer = array(), $comments)
{
$sql = 'UPDATE survey SET(`answers`= ?,`comments_per_answer`= ?)
WHERE idquestion = ?';
$stmt->prepare($sql);
foreach($answer as $questi => $value ) {
$stmt->execute(array($value, $comments[$questi],$questi));
$count = $stmt->rowCount();
echo $count > 0 ? $questi.' updated' : $questi.' did not update';
}
}
調用函數:
if(isset($_POST['answer'], $_POST['comments'])){
$answers = $_POST['answer'];
$comments = $_POST['comments'];
ModifySurveyMulti($answers, $comments);
}
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