Answers:
admin-ajax.php
负载wp-load.php
:
/** Load WordPress Bootstrap */
require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' );
wp-load.php
加载wp-config.php
,并且wp-settings.php
已加载。
在这里,我们发现:
// Load the functions for the active theme, for both parent and child theme if applicable.
if ( ! defined( 'WP_INSTALLING' ) || 'wp-activate.php' === $pagenow ) {
if ( TEMPLATEPATH !== STYLESHEETPATH && file_exists( STYLESHEETPATH . '/functions.php' ) )
include( STYLESHEETPATH . '/functions.php' );
if ( file_exists( TEMPLATEPATH . '/functions.php' ) )
include( TEMPLATEPATH . '/functions.php' );
}
因此,是的,主题functions.php
已加载。
有一个例外wp-settings.php
:
// Stop most of WordPress from being loaded if we just want the basics.
if ( SHORTINIT )
return false;
当SHORTINIT
被定义为TRUE
早期,主题将不会被加载。
所以,检查是否SHORTINIT
是TRUE
出于某种原因。
另一个常见错误是错误地使用is_admin()
。它始终TRUE
在中admin-ajax.php
,因此以下操作将失败:
if ( ! is_admin() )
// register or execute AJAX stuff
一种有效的原始方法是使用HTTP标头调试AJAX。
这是一个简单的帮助函数:
function send_debug_header( $msg )
{
static $counter = 1;
header( "X-Debug-Ajax-$counter: $msg" );
$counter += 1;
}
这个插件展示了如何使用它:
<?php # -*- coding: utf-8 -*-
/**
* Plugin Name: Debug AJAX per HTTP
* Description: Look at the HTTP headers in your browser's network console
*/
// The constant is already defined when plugins are loaded.
// Prove we have been called.
if ( defined( 'DOING_AJAX' ) && DOING_AJAX )
send_debug_header( 'File "' . __FILE__ . '" was called on an AJAX request.' );
function send_debug_header( $msg )
{
static $counter = 1;
header( "X-Debug-Ajax-$counter: $msg" );
$counter += 1;
}
add_action( 'wp_ajax_debug_test', 't5_debug_test' );
add_action( 'wp_ajax_nopriv_debug_test', 't5_debug_test' );
function t5_debug_test()
{
$in = is_user_logged_in() ? '' : 'not ';
send_debug_header( 'Function "' . __FUNCTION__ . '" was called and the user is ' . $in . 'logged in.' );
print_r( debug_backtrace() );
die(1);
}
add_action( 'wp_enqueue_scripts', 't5_enqueue_jquery' );
function t5_enqueue_jquery()
{
wp_enqueue_script( 'jquery' );
}
add_action( 'wp_footer', 't5_debug_ajax_test_button', 0 );
function t5_debug_ajax_test_button()
{
?>
<input type="submit" id="t5debugajax" value="Debug AJAX">
<script>
jQuery( function($){
var sendFeedBack = function( response ){
console.log( response );
};
$("#t5debugajax").on("click", function(){
$.post(
"<?php echo admin_url( 'admin-ajax.php' ); ?>",
{
action: "debug_test"
},
sendFeedBack
);
});
});
</script>
<?php
}
它将在前端添加一个按钮,单击该按钮会触发AJAX请求。打开浏览器的网络控制台,然后查看请求的响应标头:
TEMPLATEPATH
?;)