How can error messages like "supplied argument is not a valid PostgreSQL link resource" be resolved in PHP scripts?

The error message "supplied argument is not a valid PostgreSQL link resource" typically occurs when attempting to perform a database operation without establishing a valid connection to the PostgreSQL database. To resolve this issue, ensure that a valid database connection is established before executing any queries. 

// Establish a connection to the PostgreSQL database
$host = 'localhost';
$port = '5432';
$dbname = 'mydatabase';
$user = 'myuser';
$password = 'mypassword';

$conn = pg_connect("host=$host port=$port dbname=$dbname user=$user password=$password");

// Check if the connection is successful before executing queries
if (!$conn) {
    die("Connection failed: " . pg_last_error());
}

// Now you can safely execute your PostgreSQL queries
$query = "SELECT * FROM mytable";
$result = pg_query($conn, $query);

// Close the database connection when done
pg_close($conn);

Keywords

PHP PostgreSQL error message link resource resolution

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