What improvements can be made to the PHP script to optimize search performance and accuracy?

To optimize search performance and accuracy in a PHP script, we can implement full-text search indexing using a database engine like MySQL. This will allow for faster and more accurate search results by indexing the content of the fields being searched. Additionally, we can use prepared statements to prevent SQL injection attacks and improve query performance. 

// Connect to MySQL database
$pdo = new PDO('mysql:host=localhost;dbname=database_name', 'username', 'password');

// Create full-text index on the fields to be searched
$pdo->exec("ALTER TABLE table_name ADD FULLTEXT search_index(field1, field2)");

// Prepare and execute a search query using full-text search
$searchTerm = $_GET['search_term'];
$stmt = $pdo->prepare("SELECT * FROM table_name WHERE MATCH(field1, field2) AGAINST(:search_term)");
$stmt->bindParam(':search_term', $searchTerm);
$stmt->execute();

// Fetch and display search results
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
foreach ($results as $result) {
    echo $result['field1'] . ' - ' . $result['field2'] . '<br>';
}

Keywords

Indexing caching SQL optimization regular expressions algorithm complexity

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