PROGRESSBAR ON AJAX AND PHP

//PHP

function getProgressAction(){
		session_start();
		echo isset($_SESSION['percent']) ? $_SESSION['percent'] : '';
		exit();
	}



public function getProgress($max, $progress, $text="Загрузка: "){
			if(!$progress) $progress = 1;
			if(!$max) $progress = 1;
			$percent = round( ( $progress / $max ) * 100 );
			if( $percent > 100 ) $percent = 99;
			@ob_start();
			session_start();
		    $_SESSION['percent'] = $text ."<b>". $percent ."</b>";
		    session_write_close();
		}
    
    //JS
    
    
    
	    function getProgress() {
	        $.ajax({
	            type: 'POST',
	            url: '/index/getProgress/',
	            success: function(data) {
	                progress_bar(data);
	            },
	        });
	        return false;
	    }
	    
	    
	        var myVar = setInterval(function() {
	            getProgress();
	        }, 300);