mysqli

问题 This question already has answers here : mysqli_query() expects parameter 1 to be mysqli, object given (3 answers) Closed 8 days ago . I have this code class Db_conn { private $sn = 'localhost'; private $un = 'root'; private $up = ''; public function connect(string $db_n){ $conn = mysqli_connect($this->sn, $this->un, $this->up, $db_n); if (!$conn) { die("Připojení se nezdařilo: " . mysqli_error($conn)); } else { return $conn; } } } And this code public function update($query){ $dbconn = new

问题 I'm trying to create a class which can be used for connecting to MySQL database. This is my code: The class: <?php class createCon { var $host = 'localhost'; var $user = 'root'; var $pass = ''; var $db = 'example'; var $myconn; function connect() { $con = mysqli_connect($this->host, $this->user, $this->pass, $this->db); if (!$con) { die('Could not connect to database!'); } else { $this->myconn = $con; echo 'Connection established!';} return $this->myconn; } function close() { mysqli_close(

问题 I am trying to do an extremely simple query using mysqli. It is driving me mad! I just want $data to be an array of the values from the sql query. This is my code... $req = $app->request(); $hashtag = $req->get('hashtag'); require_once 'Slim/lib/database.php'; $db = connect_db(); $statement = $db->prepare("SELECT `content` FROM `posts` WHERE `content` LIKE ?"); $newhashtag = '%#' . $hashtag . '%'; $statement -> bind_param("s", $newhashtag); $statement -> execute(); $statement -> bind_result(

问题 I am trying to do an extremely simple query using mysqli. It is driving me mad! I just want $data to be an array of the values from the sql query. This is my code... $req = $app->request(); $hashtag = $req->get('hashtag'); require_once 'Slim/lib/database.php'; $db = connect_db(); $statement = $db->prepare("SELECT `content` FROM `posts` WHERE `content` LIKE ?"); $newhashtag = '%#' . $hashtag . '%'; $statement -> bind_param("s", $newhashtag); $statement -> execute(); $statement -> bind_result(

问题 I would like to associate the image with firstname, lastname...how can I retrieve the last rowand use it to insert to the other table? I tried $image = $mysqli->insert_id; then binding but it doesn't work. Can someone help me out? $image = $mysqli->insert_id;//this should come from table2 $stmt = $mysqli->prepare(" insert into table1 (username, firstname, lastname, image) select ?,?,?,image from table2 t2 where username = ? and t2.id = ? "); $stmt->bind_param('sssss', $username, $fname,

问题 I know, there are a couple of questions out there, that are focusing on the same Issue, but all suggested fixes are not working for me. I am running a PHP script in which I a trying to insert a CSV file into my DB using LOAD DATA INFILE like this $db = mysqli_init(); mysqli_options($db, MYSQLI_OPT_LOCAL_INFILE, true); mysqli_real_connect($db, $db_host, $db_username, $db_password, $database); $sql = "LOAD DATA LOCAL INFILE '" . $tpl_vars['filename'] . "' " . "INTO TABLE " . $table_name . " " .

问题 I want to update my SQL db without empty values from my form. That's what I've got: if(isset($_POST['account_details_submit'])) { $user_id = array_values($_SESSION['user_info'])[9]; $edited = date('d.m.Y h:i a'); if(isset($_POST['account_details_first_name']) and !empty($_POST['account_details_first_name'])) { $add .= " and `first_name` = '$_POST[account_details_first_name]'"; } if(isset($_POST['account_details_last_name']) and !empty($_POST['account_details_last_name'])) { $add .= " and

问题 I have a Mysql table (named "base") with 3 million records , which is composed of only 3 int(10) fields . When I try to run this simple query $result = mysqli_query($db, 'SELECT * FROM base') , php shows the error: PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 10485768 bytes) in C:\xampp\htdocs\combina.php on line 17 I think mysqli_query should not load all the table records into memory, right? So why the memory overflow? I'm using XAMPP installation on

问题 We noticed that a call to our API endpoint usually have multiple duplicated MySQL queries for SELECT statements (sometimes hundreds). So we decided to create a hashmap to store the mysqli_result and check if a given query has already been done and return the result saved in our map. My question is: do mysqli_result maintain a reference to our connection? Would this actually help us to avoid overloading our database with queries that have already been requested unnecessarily? If the mysqli

问题 This question already has an answer here : mysqli_fetch_assoc() expects parameter / Call to a member function bind_param() errors. How to get the actual mysql error and fix it? (1 answer) Closed 7 months ago . I have the dbc.inc.php file. inside of it there are connect function that connects me to the DB. In the test.inc.php file i have the runQuery function inside of a "Test" class. The "Test" class extends from the "Dbc" class allocated in the dbc.inc.php file. The runQuery($db, $sql) runs