i have a php function where in i want to hold a total of all the products purchased. here i am getting the cart items and i am calling the function which should hold total amount. i am passing the value Show
for example for first item iteration i send value 300, and for second 400, for third 900. i want to add up all these and get total price of 1600 in how can i do this? Best SolutionYou just simply update your query instead like as Related SolutionsPhp – How to prevent SQL injection in PHPThe correct way to avoid SQL injection attacks, no matter which database you use, is to separate the data from SQL, so that data stays data and will never be interpreted as commands by the SQL parser. It is possible to create SQL statement with correctly formatted data parts, but if you don't fully understand the details, you should always use prepared statements and parameterized queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters. This way it is impossible for an attacker to inject malicious SQL. You basically have two options to achieve this:
If you're connecting to a database other than MySQL, there is a driver-specific second option that you can refer to (for example, Correctly setting up the connectionNote that when using PDO to access a MySQL database real prepared statements are not used by default. To fix this you have to disable the emulation of prepared statements. An example of creating a connection using PDO is: In the above example the error mode isn't strictly necessary, but it is advised to add it. This way the script will not stop with a What is mandatory, however, is the first Although you can set the ExplanationThe SQL statement you pass to The important thing here is that the parameter values are combined with the compiled statement, not an SQL string. SQL injection works by tricking the script into including malicious strings when it creates SQL to send to the database. So by sending the actual SQL separately from the parameters, you limit the risk of ending up with something you didn't intend. Any parameters you send when using a prepared statement will just be treated as strings (although the database engine may do some optimization so parameters may end up as numbers too, of course). In the example above, if the Another benefit of using prepared statements is that if you execute the same statement many times in the same session it will only be parsed and compiled once, giving you some speed gains. Oh, and since you asked about how to do it for an insert, here's an example (using PDO): Can prepared statements be used for dynamic queries?While you can still use prepared statements for the query parameters, the structure of the dynamic query itself cannot be parametrized and certain query features cannot be parametrized. For these specific scenarios, the best thing to do is use a whitelist filter that restricts the possible values. Php – Deleting an element from an array in PHPThere are different ways to delete an array element, where some are more useful for some specific tasks than others. Deleting a single array elementIf you want to delete just one array element you can use If you know the value and don’t know the key to delete the element you can use $stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?'); $stmt->bind_param('s', $name); // 's' specifies the variable type => 'string' $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) { // Do something with $row } 2Note that when you use Code: Output: $stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?'); $stmt->bind_param('s', $name); // 's' specifies the variable type => 'string' $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) { // Do something with $row } 3 methodIf you use Code: Output: Deleting multiple array elementsIf you want to delete multiple array elements and don’t want to call $dbConnection = new PDO('mysql:dbname=dbtest;host=127.0.0.1;charset=utf8', 'user', 'password'); $dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 8 methodIf you know the values of the array elements which you want to delete, then you can use Code: Output: $dbConnection = new PDO('mysql:dbname=dbtest;host=127.0.0.1;charset=utf8', 'user', 'password'); $dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 9 methodIf you know the keys of the elements which you want to delete, then you want to use Code: Output: If you want to use How to calculate total amount in PHP?Answer: Use the PHP array_sum() function
You can use the PHP array_sum() function to calculate the sum of all the numeric values in an array.
How do you calculate total price?Total Price Formula
To calculate the total price, multiply the number of items purchased by the average price per item.
How to calculate value in PHP?PHP has a set of math functions that allows you to perform mathematical tasks on numbers.. PHP pi() Function. The pi() function returns the value of PI: ... . PHP min() and max() Functions. ... . PHP abs() Function. ... . PHP sqrt() Function. ... . PHP round() Function.. How to calculate price from database in PHP?The code use MySQLi SUM() query to automatically calculate the price data in the database before displaying it to the HTML page.
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How to sum total price in php?
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