How to use ajax in wordpress

Now I will share with you a detailed explanation of ajax writing method based on wordpress. It has a good reference value and I hope it will be helpful to everyone.

I wanted to make changes to a wordpress template program, and thought of the convenience of ajax, so I did some research.

The following is the usage method and code:

js page is as follows

<script>
  var ajaxurl = '<?php echo admin_url('admin-ajax.php')?>';
  function getVideo(id){
		//必须使用以下里面才能正常使用jquery
    jQuery(document).ready(function($){
      var data={
        tape:id,
				//这里尤为重要，action的参数要和请求的函数名一致
        action : 'get_ajax_video',
      }
      $.post(ajaxurl, data, function(response) {
        $('.player').html(response);
      });
    });
  }
</script>

AJAX request should Point to wp-admin/admin-ajax.php. Although the word "admin" is a bit misleading, even the ajax request at the front desk should be located at admin-ajax.php.

admin-ajax requires a parameter "action". Admin-ajax requires this parameter to handle the request. It usually triggers a hook, which varies depending on whether you are logged in or not.

Then write the function in the plug-in or theme

function get_ajax_video() {
  // 输出响应
  header( "Content-Type: application/json" );
  echo json_encode($html);
  exit;//这个停止一定要写
}
//函数名对应添加上，第一个表示用户没有登录时，这里全部都一样处理
add_action( 'wp_ajax_nopriv_get_ajax_video', 'get_ajax_video' );
add_action( 'wp_ajax_get_ajax_video', 'get_ajax_video' );

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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