In PHP, how can variable scope impact the accessibility of database connections within functions?

Variable scope in PHP can impact the accessibility of database connections within functions because variables defined outside of a function are not directly accessible inside the function. To solve this issue, you can use the `global` keyword to access global variables within a function or pass the database connection as a parameter to the function. 

// Define the database connection outside of the function
$dbConnection = new mysqli('localhost', 'username', 'password', 'database');

// Function that uses the global keyword to access the database connection
function fetchData() {
    global $dbConnection;
    
    // Use $dbConnection to fetch data from the database
}

// Call the function
fetchData();

Keywords

PHP variable scope database connections functions accessibility

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