如何使用 php 从 mySQL table 获取一行数据?
How do I get one row of data from mySQL table using php?
这是我现有的 PHP 代码的示例。我只是想从 table 中抓取一行,但 returns 这个错误:
Call to a member function fetch_assoc() on a non-object
如有任何见解,我们将不胜感激。
$pathname = "C:\Users\BL\Documents\GitHub\Moozik\music";
$files = scandir($pathname);
$server = "localhost";
$user = "root";
$pass = "";
while ($files[0] == "." || $files[0] == "..") {
array_shift($files);
}
print_r($files);
$song = $pathname . '\' . $files[0];
$conn = new mysqli($server, $user, $pass);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT song_path FROM song_data";
$result = mysqli_query($conn, $sql);
while($row = $result->fetch_assoc()) {
$its = $row["song_path"];
printf($its);
}
mysqli_close($conn);
您可以使用
$row=mysqli_fetch_array($result)
您甚至不必使用 while,因为您只想获取一行。如果你想获取多行,那么你可以使用 while。
你可以用这个。
$row=mysqli_fetch_row($result)
它将从结果集中获取一行..
希望这会有所帮助!
第 1 点:
You have mixed mysqli Object-oriented and Procedural methods...Use any one
第 2 点:
$conn = new mysqli($server, $user, $pass);
// Here You missed database to be selected
第 3 点:
$result = mysqli_query($conn, $sql); // Used procedural method But Connection is by Object Oriented method
这是一个完整的面向对象的方法
$conn = new mysqli($server, $user, $pass, $database);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT song_path FROM song_data";
$result = $conn->query($sql);
while($row = $result->fetch_assoc()) {
$its = $row["song_path"];
echo $its;
}
$conn->close();
这是我现有的 PHP 代码的示例。我只是想从 table 中抓取一行,但 returns 这个错误:
Call to a member function fetch_assoc() on a non-object
如有任何见解,我们将不胜感激。
$pathname = "C:\Users\BL\Documents\GitHub\Moozik\music";
$files = scandir($pathname);
$server = "localhost";
$user = "root";
$pass = "";
while ($files[0] == "." || $files[0] == "..") {
array_shift($files);
}
print_r($files);
$song = $pathname . '\' . $files[0];
$conn = new mysqli($server, $user, $pass);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT song_path FROM song_data";
$result = mysqli_query($conn, $sql);
while($row = $result->fetch_assoc()) {
$its = $row["song_path"];
printf($its);
}
mysqli_close($conn);
您可以使用
$row=mysqli_fetch_array($result)
您甚至不必使用 while,因为您只想获取一行。如果你想获取多行,那么你可以使用 while。
你可以用这个。
$row=mysqli_fetch_row($result)
它将从结果集中获取一行..
希望这会有所帮助!
第 1 点:
You have mixed mysqli Object-oriented and Procedural methods...Use any one
第 2 点:
$conn = new mysqli($server, $user, $pass);
// Here You missed database to be selected
第 3 点:
$result = mysqli_query($conn, $sql); // Used procedural method But Connection is by Object Oriented method
这是一个完整的面向对象的方法
$conn = new mysqli($server, $user, $pass, $database);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT song_path FROM song_data";
$result = $conn->query($sql);
while($row = $result->fetch_assoc()) {
$its = $row["song_path"];
echo $its;
}
$conn->close();