cubrid_query

Send a CUBRID query

&reftitle.description; `resource` `cubrid_query` `string` `query` `resource` `conn_identifier`

`cubrid_query` sends a unique query (multiple queries are not supported) to the currently active database on the server that's associated with the specified `conn_identifier`.

&reftitle.parameters;

`query`

- An SQL query

  Data inside the query should be properly escaped.

`conn_identifier`

- The CUBRID connection. If the connection identifier is not specified, the last connection opened by `cubrid_connect` is assumed.

&reftitle.returnvalues;

For SELECT, SHOW, DESCRIBE, EXPLAIN and other statements returning resultset, `cubrid_query` returns a `resource` on success, or &false; on error.

For other type of SQL statements, INSERT, UPDATE, DELETE, DROP, etc, `cubrid_query` returns &true; on success or &false; on error.

The returned result resource should be passed to `cubrid_fetch_array`, and other functions for dealing with result tables, to access the returned data.

Use `cubrid_num_rows` to find out how many rows were returned for a SELECT statement or `cubrid_affected_rows` to find out how many rows were affected by a DELETE, INSERT, REPLACE, or UPDATE statement.

`cubrid_query` will also fail and return &false; if the user does not have permission to access the table(s) referenced by the query.

&reftitle.examples;

### Invalid Query

The following query is syntactically invalid, so `cubrid_query` fails and returns &false;.

    <?php
    $conn = cubrid_connect('localhost', 33000, 'demodb');

    $result = cubrid_query('SELECT * WHERE 1=1');
    if (!$result) {
        die('Invalid query: ' . cubrid_error());
    }

    ?>

### Valid Query

The following query is valid, so `cubrid_query` returns a `resource`.

    <?php
    // This could be supplied by a user, for example
    $firstname = 'fred';
    $lastname  = 'fox';

    $conn = cubrid_connect('localhost', 33000, 'demodb');

    cubrid_execute($conn,"DROP TABLE if exists friends");
    cubrid_execute($conn,"create table friends(firstname varchar,lastname varchar,address char(24),age int)");
    cubrid_execute($conn,"insert into friends values('fred','fox','home-1','20')");
    cubrid_execute($conn,"insert into friends values('blue','cat','home-2','21')");
    // Formulate Query
    // This is the best way to perform an SQL query
    // For more examples, see cubrid_real_escape_string()
    $query = sprintf("SELECT firstname, lastname, address, age FROM friends WHERE firstname='%s' AND lastname='%s'",
    cubrid_real_escape_string($firstname),
    cubrid_real_escape_string($lastname));

    // Perform Query
    $result = cubrid_query($query);

    // Check result
    // This shows the actual query sent to CUBRID, and the error. Useful for debugging.
    if (!$result) {
        $message  = 'Invalid query: ' . cubrid_error() . "\n";
        $message .= 'Whole query: ' . $query;
        die($message);
    }

    // Use result
    // Attempting to print $result won't allow access to information in the resource
    // One of the cubrid result functions must be used
    // See also cubrid_result(), cubrid_fetch_array(), cubrid_fetch_row(), etc.
    while ($row = cubrid_fetch_assoc($result)) {
        echo $row['firstname'];
        echo $row['lastname'];
        echo $row['address'];
        echo $row['age'];
    }

    // Free the resources associated with the result set
    // This is done automatically at the end of the script
    cubrid_free_result($result);
    ?>

&reftitle.seealso;

- `cubrid_connect`
- `cubrid_error`
- `cubrid_real_escape_string`
- `cubrid_result`
- `cubrid_fetch_assoc`
- `cubrid_unbuffered_query`