[英]mysql_ to mysqli_ Conversion Problems
I have a small website that I wanted to switch over to the mysqli_* functions, and after reading up a lot on it I decided to do the switch by doing a replace-all mysql_
with mysqli_
-- I then went through and verified that everything changed correctly... 我有一个小网站,我想切换到mysqli_ *函数,在阅读 了很多内容后,我决定通过mysql_
替换所有mysql_
进行mysqli_
- 然后我通过并验证了所有内容改变正确...
Now, the mysqli_connect()
works - (I get a valid resource connection back from it) but further down the PHP script I have a mysqli_query
function that is returning NULL
no matter what I put in as the SQL. 现在, mysqli_connect()
工作 - (我从它获得了一个有效的资源连接)但是在PHP脚本的下方,我有一个mysqli_query
函数,无论我把它作为SQL放入什么,它都会返回NULL
。
Any thoughts what could be happening? 有什么想法会发生什么?
The relevant code: 相关代码:
function connecti_database() {
mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_DATABASE);
}
connecti_database();
$sql = 'SELECT * FROM table where id = 5';
$result = mysqli_query($sql);
var_dump($result); // this returns NULL every time
mysqli functions require two parameters, not one mysqli函数需要两个参数,而不是一个
...and a developer required to read documentation first. ......以及开发人员需要先阅读文档 。
function connecti_database() {
global $mysqli;
$mysqli = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_DATABASE);
mysqli_select_db($mysqli,DB_DATABASE);
}
connecti_database();
$sql = 'SELECT * FROM table where id = 5';
$result = mysqli_query($mysqli, $sql);
PHP Manual: http://php.net/manual/en/mysqli.query.php PHP手册: http : //php.net/manual/en/mysqli.query.php
mixed mysqli_query ( mysqli $link , string $query [, int $resultmode = MYSQLI_STORE_RESULT ] )
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