What is the common mistake in the MySQL query in the provided PHP code?

The common mistake in the MySQL query in the provided PHP code is that the values being inserted into the database are not properly escaped, which can lead to SQL injection vulnerabilities. To solve this issue, you should use prepared statements with parameterized queries to securely insert data into the database. Here is an example of the PHP code snippet with the fix implemented: 

<?php
// Establish a connection to the database
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Prepare a SQL query with a parameterized query
$stmt = $mysqli->prepare("INSERT INTO table_name (column1, column2) VALUES (?, ?)");

// Bind parameters
$stmt->bind_param("ss", $value1, $value2);

// Set the values of the parameters
$value1 = "value1";
$value2 = "value2";

// Execute the query
$stmt->execute();

// Close the statement and the connection
$stmt->close();
$mysqli->close();
?>

Keywords

MySQL query PHP code mistake error types

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