为wordpress添加ajax方法

wordpress作为一款维护开发了18年的程序，是让PHP焕发第一春的大功臣。wordpress可谓是极其强大。我们就做一个切换一言的api页面来演示”为wordpress添加ajax方法“吧，简单、方便理解。

前端页面：

<span id="random"><i id="say"><?php echo random_str();?></i> [<a href="javascript:void();" onclick="yiyan();" rel="nofollow">换一句</a>]</span>
<?php $admin_url=admin_url( 'admin-ajax.php' );?>
<script type="text/javascript">
function yiyan(){
    jQuery(document).ready(function($){
        var data={
            action:'say'
        }
        $.post("<?php echo $admin_url;?>", data, function(response) {
            $("#say").text(response);
        });
    });
}
</script>
<span id="random"><i id="say"><?php echo random_str();?></i> [<a href="javascript:void();" onclick="yiyan();" rel="nofollow">换一句</a>]</span>
<?php $admin_url=admin_url( 'admin-ajax.php' );?>
<script type="text/javascript">
function yiyan(){
    jQuery(document).ready(function($){
        var data={
            action:'say'
        }
        $.post("<?php echo $admin_url;?>", data, function(response) {
            $("#say").text(response);
        });
    });
}
</script>
<span id="random"><i id="say"><?php echo random_str();?></i> [<a href="javascript:void();" onclick="yiyan();" rel="nofollow">换一句</a>]</span>
<?php $admin_url=admin_url( 'admin-ajax.php' );?>
<script type="text/javascript">
function yiyan(){
    jQuery(document).ready(function($){
        var data={
            action:'say'
        }
        $.post("<?php echo $admin_url;?>", data, function(response) {
            $("#say").text(response);
        });
    });
}
</script>

新建ajax请求（处理ajax）：

function yiyan(){
      $data=array(
        'KEKC博客',
        'https://www.kekc.cn/',
    );
    echo $data[rand(0,count($data)-1)];
    die();
}
add_action('wp_ajax_yiyan', 'yiyan');//为登录用户添加ajax功能
add_action('wp_ajax_nopriv_yiyan', 'yiyan');//为未登录用户添加ajax功能
function yiyan(){
      $data=array(
        'KEKC博客',
        'https://www.kekc.cn/',
    );
    echo $data[rand(0,count($data)-1)];
    die();
}
add_action('wp_ajax_yiyan', 'yiyan');//为登录用户添加ajax功能
add_action('wp_ajax_nopriv_yiyan', 'yiyan');//为未登录用户添加ajax功能
function yiyan(){
      $data=array(
        'KEKC博客',
        'https://www.kekc.cn/',
    );
    echo $data[rand(0,count($data)-1)];
    die();
}
add_action('wp_ajax_yiyan', 'yiyan');//为登录用户添加ajax功能
add_action('wp_ajax_nopriv_yiyan', 'yiyan');//为未登录用户添加ajax功能