incr.php

<?php

$link = mysqli_connect(
            '192.168.1.115',  /* The host to connect to */
            'root',       /* The user to connect as */
            '',   /* The password to use */
            'test');     /* The default database to query */

mysqli_query($link, "update requests set num=num + 1 where page_id = 1");

/* Send a query to the server */
if ($result = mysqli_query($link, 'select num from requests where page_id = 1')) {

    /* Fetch the results of the query */
    while( $row = mysqli_fetch_assoc($result) ){
        printf("requests: %d\n", $row['num']);
    }

    /* Destroy the result set and free the memory used for it */
    mysqli_free_result($result);
}

/* Close the connection */
mysqli_close($link);
?>