PHP数据库调用出错！Fatal error: Call to a member function fetch_row() on a non-object in

Fatal error: Call to a member function fetch_row() on a non-object

严重错误：调用fetch_row()的不是一个对象。

出现这种错误，建议检查

　$result_news = $mysqli->query ( $query_news )

看这句代码执行后，得到的结果是否正确，即看　$result_news　是不是一个对象，可以用以下代码查看：

print_r($result_news)

正确的结果应该是类似下面的：

mysqli_result Object ( [current_field] =>0 [field_count] =>8 [lengths] =>[num_rows] =>1 [type] =>0 )

$result1->fetch_assoc()

$mysqli = new mysqli("localhost", "my_user", "my_password", "world")

$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 50,5"

if ($result = $mysqli->query($query)) {

/* fetch associative array */

while ($row = $result->fetch_assoc()) {

printf ("%s (%s)\n", $row["Name"], $row["CountryCode"])

}

/* free result set */

$result->close()

}

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原形 array mysqli_fetch_assoc ( mysqli_result result )

<?php

$link = mysqli_connect("localhost", "my_user", "my_password", "world")

/* check connection */

if (mysqli_connect_errno()) {

printf("Connect failed: %s\n", mysqli_connect_error())

exit()

}

$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 50,5"

if ($result = mysqli_query($link, $query)) {

/* fetch associative array */

while ($row = mysqli_fetch_assoc($result)) {

printf ("%s (%s)\n", $row["Name"], $row["CountryCode"])

}

/* free result set */

mysqli_free_result($result)

}

/* close connection */

mysqli_close($link)

?>

你别混用阿，而且原形就一个参数，你给了俩

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