PHP Ajax上传文件实例[ajaxfileupload.js]_PHP教程

jQuery.extend({
   
 

    createUploadIframe: function(id, uri)
    {
           //create frame
            var frameId = 'jUploadFrame' + id;
            var iframeHtml = '            if(window.ActiveXObject)
           {
                if(typeof uri== 'boolean'){
                  iframeHtml += ' src="' + 'javascript:false' + '"';
 

                }
                else if(typeof uri== 'string'){
                  iframeHtml += ' src="' + uri + '"';
 

                }
           }
           iframeHtml += ' />';
           jQuery(iframeHtml).appendTo(document.body);
 

            return jQuery('#' + frameId).get(0);       
    },
    createUploadForm: function(id, fileElementId, data)
    {
       //create form
       var formId = 'jUploadForm' + id;
       var fileId = 'jUploadFile' + id;
       var form = jQuery('

      
       //set attributes
       jQuery(form).css('position', 'absolute');
       jQuery(form).css('top', '-1200px');
       jQuery(form).css('left', '-1200px');
       jQuery(form).appendTo('body');    
       return form;
    },
 

    ajaxFileUpload: function(s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout     
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()       
       var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data));
       var io = jQuery.createUploadIframe(id, s.secureuri);
       var frameId = 'jUploadFrame' + id;
       var formId = 'jUploadForm' + id;      
        // Watch for a new set of requests
        if ( s.global && ! jQuery.active++ )
       {
           jQuery.event.trigger( "ajaxStart" );
       }           
        var requestDone = false;
        // Create the request object
        var xml = {}  
        if ( s.global )
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function(isTimeout)
       {         
           var io = document.getElementById(frameId);
            try
           {            
              if(io.contentWindow)
              {
                   xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                   xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
                  
              }else if(io.contentDocument)
              {
                   xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                  xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
              }                   
            }catch(e)
           {
              jQuery.handleError(s, xml, null, e);
           }
            if ( xml || isTimeout == "timeout")
           {            
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if ( status != "error" )
                  {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData( xml, s.dataType );   
                        // If a local callback was specified, fire it and pass it the data
                        if ( s.success )
                            s.success( data, status );
   
                        // Fire the global callback
                        if( s.global )
                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                    } else
                        jQuery.handleError(s, xml, status);
                } catch(e)
              {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }
 

                // The request was completed
                if( s.global )
                    jQuery.event.trigger( "ajaxComplete", [xml, s] );
 

                // Handle the global AJAX counter
                if ( s.global && ! --jQuery.active )
                    jQuery.event.trigger( "ajaxStop" );
 

                // Process result
                if ( s.complete )
                    s.complete(xml, status);
 

                jQuery(io).unbind()
 

                setTimeout(function()
                                {   try
                                   {
                                       jQuery(io).remove();
                                       jQuery(form).remove();  
                                      
                                   } catch(e)
                                   {
                                       jQuery.handleError(s, xml, null, e);
                                   }                              
 

                                }, 100)
 

                xml = null
 

            }
        }
        // Timeout checker
        if ( s.timeout > 0 )
       {
            setTimeout(function(){
                // Check to see if the request is still happening
                if( !requestDone ) uploadCallback( "timeout" );
            }, s.timeout);
        }
        try
       {
 

           var form = jQuery('#' + formId);
           jQuery(form).attr('action', s.url);
           jQuery(form).attr('method', 'POST');
           jQuery(form).attr('target', frameId);
            if(form.encoding)
           {
              jQuery(form).attr('encoding', 'multipart/form-data');              
            }
            else
           {  
              jQuery(form).attr('enctype', 'multipart/form-data');       
            }       
            jQuery(form).submit();
 

        } catch(e)
       {         
            jQuery.handleError(s, xml, null, e);
        }
      
       jQuery('#' + frameId).load(uploadCallback );
        return {abort: function () {}}; 
 

    },
 

    uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // If the type is "script", eval it in global context
        if ( type == "script" )
            jQuery.globalEval( data );
        // Get the JavaScript object, if JSON is used.
        if ( type == "json" )
            eval( "data = " + data );
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("

if ((($_FILES["file1"]["type"] == "image/gif")
|| ($_FILES["file1"]["type"] == "image/jpeg")
|| ($_FILES["file1"]["type"] == "image/bmp")
|| ($_FILES["file1"]["type"] == "image/pjpeg"))
&& ($_FILES["file1"]["size"]     $extend = explode(".",$_FILES["file1"]["name"]);
    $key = count($extend)-1;
    $ext = ".".$extend[$key];
    $newfile = time().$ext;
 

    if(!file_exists('upload')){mkdir('upload');}
    move_uploaded_file($_FILES["file1"]["tmp_name"],"upload/" . $newfile);
    @unlink($_FILES['file1']);
    echo $newfile;
}else {
    echo 'error';
}
?>