问题
I want to print all the rows on the table. Every row is an answer to a question in a forum. The user can delete rows.
I can get the whole table in the database. But i don't know how to get every row.
The controller:
for ($idAnswer=1; $idAnswer<=?; $idAnswer++){
$data=getData($idCourse, $idForum, $idAnswer);
$author=$data['author'];
$answer=$data['answer'];
$date=$data['date'];
echo $author;
echo $answer;
echo $date;
}
The funtion:
public function getData($idCourse, $idForum, $idAnswer) {
//Conect
try {
$this->BD=new PDO($this->infoBD, $this->usuarioBD, $this->claveBD);
$this->BD->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}catch(PDOException $e){echo $e; }
//Get data
try {
$sql=$this->BD->prepare("SELECT author, date, answer
FROM answers
WHERE idForum='$idForum' and idCourse='$idCourse' and idAnswer='$idAnswer'");
$sql->execute();
$sql->setFetchMode(PDO::FETCH_ASSOC);
$data=$sql->fetch();
if ($data!=null){
return $data;
} else {
return 0;
}
}catch (PDOException $e){
echo $e;
}
Thanks for your help
回答1:
fetch()
function returns you the next row from the result set. You need something like this to get all results:
while($data = $sql->fetch()) {
echo ($data['author']);
echo ($data['date']);
//...etc...
}
Or you can use fetchAll()
function which returns an array with each row from the result and you can use a loop top traverse the array and do whatever you want with each row.
Example with fetchAll()
:
$data = $sql->fetchAll(PDO::FETCH_ASSOC);
foreach($data as $row) {
echo $row['autor'];
echo $row['date'];
//do whatever you want with the row
}
回答2:
Use fetchall(PDO::FETCH_ASSOC)
来源:https://stackoverflow.com/questions/29655369/how-to-print-a-mysql-database-table-in-php-using-pdo