What are the potential pitfalls of using arrays in PHP for storing crawled URLs, especially when dealing with a large number of links?

Using arrays in PHP to store crawled URLs can lead to memory exhaustion and performance issues when dealing with a large number of links. To avoid these pitfalls, consider using a database to store the URLs instead of an array. This will allow for more efficient storage and retrieval of data, especially when dealing with a high volume of URLs. 

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "urls";

$conn = new mysqli($servername, $username, $password, $dbname);

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

// Store crawled URL in the database
$url = "http://example.com";
$sql = "INSERT INTO crawled_urls (url) VALUES ('$url')";

if ($conn->query($sql) === TRUE) {
    echo "URL stored successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

// Close the database connection
$conn->close();

Keywords

arrays PHP storing crawled URLs large number of links

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