[英]Php queries aren't working
我已經連續幾天運行了這段代碼。 我已經在phpmyadmin中的數據庫中測試了我的查詢,該查詢可以正常工作,並且我與數據庫的連接表示已連接,但是在我運行代碼時無法正常工作。 有任何想法嗎?
這是我的查詢:
SELECT *
FROM customer
ORDER BY customer.CUST_LAST_NAME
這是我的PHP代碼:
<!doctype html>
<?php
require_once('./connection.php')
?>
<html>
<head>
<meta charset="UTF-8">
<title>Untitled Document</title>
<link href="css/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
<?php
//query
$resultset = $mysqli->query ("SELECT * FROM customer ORDER BY customer.CUST_LAST_NAME;");
echo $resultset->num_rows;
?>
</body>
</html>
該代碼已進行調整以滿足您的需要。 它會顯示您想要的行數以及客戶的姓氏 。 如果它解決了您的問題,則可以將其標記為正確答案。 如果它在這里無法ping通,我將為您提供進一步的幫助。
將數據庫憑據更改為您的
<!doctype html>
<?php
//require_once('./connection.php')
$dbhost = 'localhost:3306';
$dbuser = 'root';
$dbpass = '';
$dbname = 'angular';
$conn = mysqli_connect($dbhost, $dbuser, $dbpass,$dbname);
if(! $conn ) {
die('Could not connect: ' . mysqli_error());
}
echo 'Connected successfully<br>';
?>
<html>
<head>
<meta charset="UTF-8">
<title>Untitled Document</title>
<link href="css/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
<?php
/*query
$resultset = $mysqli->query ("SELECT * FROM customer ORDER BY customer.CUST_LAST_NAME;");
echo $resultset->num_rows;*/
$sql = 'SELECT * from customer order by customer.CUST_LAST_NAME';
$result = mysqli_query($conn, $sql);
echo $result->num_rows;
if (mysqli_num_rows($result) > 0) {
while($row = mysqli_fetch_assoc($result)) {
echo "<br><br>customer lastName: " . htmlentities($row["CUST_LAST_NAME"], ENT_QUOTES, "UTF-8"). "<br>";
}
} else {
echo "0 results";
}
mysqli_close($conn);
?>
</body>
</html>
您始終需要按照PHP文檔中的以下示例進行錯誤處理。
這樣,您可以調試問題,即:
http://php.net/manual/zh/mysqli.error.php
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if ($mysqli->connect_errno) {
printf("Connect failed: %s\n", $mysqli->connect_error);
exit();
}
if (!$mysqli->query("SET a=1")) {
printf("Errormessage: %s\n", $mysqli->error);
}
/* close connection */
$mysqli->close();
?>
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