Ajax實現搜尋欄中輸入時的自動提示功能

<script src="jquery-1.2.1.pack.js" type="text/javascript"></script>
<script type="text/javascript">

function lookup(inputString) {
    if(inputString.length == 0) {
        // Hide the suggestion box.
        $(‘#suggestions’).hide();
    } else {
        $.post("rpc.php", {queryString: ""+inputString+""}, function(data){
            if(data.length >0) {
                $(‘#suggestions’).show();
                $(‘#autoSuggestionsList’).html(data);
            }
        });
    }
} // lookup

function fill(thisValue) {
    $(‘#inputString’).val(thisValue);
   $(‘#suggestions’).hide();
}

</script>

$.post(url, [data], [callback])

程式碼

// PHP5 Implementation - uses MySQLi.
$db = new mysqli(‘localhost’, ‘root’ ,”, ‘autoComplete’);
if(!$db) {
    // Show error if we cannot connect.
    echo ‘ERROR: Could not connect to the database.’;
} else {
    // Is there a posted query string?
    if(isset($_POST[‘queryString’])) {
        $queryString = $_POST[‘queryString’];
        // Is the string length greater than 0?
        if(strlen($queryString) >0) {
        // Run the query: We use LIKE ‘$queryString%’
        // The percentage sign is a wild-card, in my example of countries it works like this…
        // $queryString = ‘Uni’;
        // Returned data = ‘United States, United Kindom’;
        $query = $db->query("SELECT value FROM countries WHERE value LIKE ‘$queryString%’ LIMIT 10");
        if($query) {
            // While there are results loop through them - fetching an Object (i like PHP5 btw!).
            while ($result = $query ->fetch_object()) {
                // Format the results, im using <li> for the list, you can change it.
                // The onClick function fills the textbox with the result.
                echo ‘<li onclick="fill(’‘.$result->value.’‘);">’.$result->value.‘</li>’;
            }
        } else {
            echo ‘ERROR: There was a problem with the query.’;
        }
    } else {
        // Dont do anything.
    } // There is a queryString.
} else {
    echo ‘There should be no direct access to this script!’;
}
}

?>

程式碼

<style type="text/css">
.suggestionsBox {
    position: relative;
    left: 30px;
    margin: 10px 0px 0px 0px;
    width: 200px;
    background-color: #212427;
    -moz-border-radius: 7px;
    -webkit-border-radius: 7px;
    border: 2px solid #000;
    color: #fff;
}

.suggestionList {
    margin: 0px;
    padding: 0px;
}

.suggestionList li {
    margin: 0px 0px 3px 0px;
    padding: 3px;
    cursor: pointer;
}

.suggestionList li:hover {
    background-color: #659CD8;
}
</style>

程式碼

<div>
       <div>

      Type your county (for the demo):
<input size="30" id="inputString" onkeyup="lookup(this.value);" type="text" />

    </div>      <div class="suggestionsBox" id="suggestions" style="display: none;">

      <img src="upArrow.png" style="position: relative; top: -12px; left: 30px" alt="upArrow" />

      <div class="suggestionList" id="autoSuggestionsList">

</div>

    </div>

</div>