mysqli

问题 I have two queries both dependent on each other, i.e. if first query is not executed the second shouldn't be executed, and the other way around if second can't be executed the first shouldn't be executed. INSERT INTO `table` VALUES (1,2,3) UPDATE `otherTable` SET `val1`=1 WHERE `id`=$idOfInsert ON DUPLICATE KEY UPDATE is not the answer. I tried using mysqli::multi_query but as it turned out it executes the first even though the second can't be executed (it stops on error). How can I achieve

问题 After successfully verifying username exists in the database, I need to verify whether the password matches as well. Therefore, I need to retrieve the hashed password from the database, right? Or do I have other choices? I'm using PHP 5.5 API bcrypt for hashing. My code would give me a 500 internal server error when I get the password from database. How do I do this correctly? Here's my php code: // If found username, check password, else respond invalid username if($countRows!==0){ // Get

问题 I'm writing a class and handful of functions to connect to the database and retrieve the information from the tables. I went through previous posts having similar titles, but most of them have written using mysql functions and I am using mysqli functions. I want somebody who can go through this simple script and let me know where I am making my mistake. This is my class.connect.php : <?php class mySQL{ var $host; var $username; var $password; var $database; public $dbc; public function

问题 I have a pagination that works correctly even I have added a filter to paginate more rows on the same page is to say that through the filter I can show 10 or 50 rows. The small defect that I have in my code is that the page is reloaded, changing how many rows show and the same happens in the buttons of the pagination. This is my code, everything is working on the same page index2.php . <div id="wrapper"> <div class="container"> <div id="news-header" class="bootgrid-header container-fluid">

问题 What is the difference between these two prepared statements? 1 $stmt = $pdo->prepare('SELECT * FROM employees WHERE name = :name'); $stmt->execute(array('name' => $name)); foreach ($stmt as $row) { // do something with $row } 2 $stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?'); $stmt->bind_param('s', $name); $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) { // do something with $row } i checked many courses about prepared

问题 What is the difference between these two prepared statements? 1 $stmt = $pdo->prepare('SELECT * FROM employees WHERE name = :name'); $stmt->execute(array('name' => $name)); foreach ($stmt as $row) { // do something with $row } 2 $stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?'); $stmt->bind_param('s', $name); $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) { // do something with $row } i checked many courses about prepared

问题 This question already has answers here : When to use single quotes, double quotes, and backticks in MySQL (13 answers) Closed 5 years ago . I receive the following error: Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement I am having trouble binding and executing the prepare statement. The connection to the database is succesfully established and it does manage to insert it into the database with the initial value of ? Below is the

问题 This question already has answers here : When to use single quotes, double quotes, and backticks in MySQL (13 answers) Closed 5 years ago . I receive the following error: Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement I am having trouble binding and executing the prepare statement. The connection to the database is succesfully established and it does manage to insert it into the database with the initial value of ? Below is the

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 2 months ago . I'm running into many problems with a code I've been working on, but this one seems to come up a lot. I'm using the procedural method for coding this site, and I can't seem to find an answer to this question without the mention of OOP's, prepared statements or failed queries. The funny

问题 I have a php script that changes a database when the page is requested. Here is the php: <?php date_default_timezone_set('EST');//set time zone $con=mysqli_connect("baukin.fatcowmysql.com","sas","***pass***","dbname");//establish connection // Check connection if (mysqli_connect_errno())//ping database to check connection { echo "Failed to connect to MySQL: " . mysqli_connect_error();//error message } else { echo "Successfully updated database";//success message } mysqli_query($con,"UPDATE