How Can I Efficiently and Securely Execute Multiple MySQL Queries in a Single PHP Call?

Multiple Queries in a Single MySQL Query in PHP

PHP allows for the execution of multiple queries in a single database call. This technique can be useful for performing a series of related operations in a single step, improving performance and reducing network overhead.

To execute multiple queries in a single PHP call, you can concatenate the individual queries into a single string. However, this method is not recommended as it can lead to security vulnerabilities such as SQL injection.

Improved Approach

A more secure and efficient approach is to use prepared statements. Prepared statements allow you to create a template for your query and then execute it multiple times with different data parameters. This approach helps protect against SQL injection by preventing the concatenation of user-supplied data directly into the query.

Example:

$stmt = $conn->prepare("INSERT INTO a VALUES (?, ?);");
$stmt->bind_param("ii", 1, 23);
$stmt->execute();
$stmt->bind_param("ii", 2, 34);
$stmt->execute();

In the above example, the placeholders ? represent the data to be inserted. The bind_param() method assigns values to the placeholders, and the execute() method executes the query.

By using prepared statements, you can execute multiple insert queries efficiently and securely.

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