试试这个 ：
jQuery(document).on('click', '#submit', function(e){ e.preventDefault(); var fd = new FormData(); var file = jQuery(document).find('input[type="file"]'); var caption = jQuery(this).find('input[name=img_caption]'); var individual_file = file[0].files[0]; fd.append("file", individual_file); var individual_capt = caption.val(); fd.append("caption", individual_capt); fd.append('action', 'fiu_upload_file'); jQuery.ajax({ type: 'POST', url: fiuajax.ajaxurl, data: fd, contentType: false, processdata: false, success: function(response){ console.log(response); } });});的PHP
function fiu_upload_file(){ var_dump($_FILES); exit();}add_action('wp_ajax_fiu_upload_file', 'fiu_upload_file');add_action('wp_ajax_nopriv_fiu_upload_file', 'fiu_upload_file');
