复制代码代码如下:

<?php

function module_name_form() {

$form = array();

$form['city'] = array(

'#title' => t('City'),

'#type' => 'textfield',

'#autocomplete_path' => 'example/autocomplete',//--调用的路径

);

$form['submit'] = array(

'#type' => 'submit',

'#value' => 'Save',

);

return $form;

}

//--定义路径

function module_name_menu() {

$items['example/autocomplete'] = array(

'page callback' => '_module_name_autocomplete', //--调用数据

'access arguments' => array('access example autocomplete'),

'type' => MENU_CALLBACK

);

return $items;

}

//--从数据库读取返回数据

function _module_name_autocomplete($string) {

$matches = array();

// Some fantasy DB table which holds cities

$query = db_select('cities', 'c');

// Select rows that match the string

$return = $query

->fields('c', array('city'))

->condition('c.city', '%' . db_like($string) . '%', 'LIKE')

->range(0, 10)

->execute();

// add matches to $matches

foreach ($return as $row) {

$matches[$row->city] = check_plain($row->city);

}

// return for JS

drupal_json_output($matches); //--json格式返回

}

?>