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Editorial Team
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Asked: 2026-05-23T03:28:34+00:00

My PHP pages and HTML pages instantly reflect any change I make to them,

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My PHP pages and HTML pages instantly reflect any change I make to them, making it very easy to view my changes as I develop a page.

ASP pages never show any change on the first refresh, and only show their updated content after a 1-2 minute wait. This makes development extremely slow and frustrating.

Why does this happen? Is it simply a quirk of my hosting service that I will have to accept, or is there something I can do about it?

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1 Answer

  1. Editorial Team

    Sounds more like a client problem than a code problem. I’m willing to bet the browser is keeping the page in the cache, instead of requesting a new page every time. You can test this by forcing a no-cache page refresh using CTRL-F5 (should work in most browsers).

    After that, you can prevent caching in a handful of ways.

    For classic asp:

    <%
    Response.Expires = -1
    Response.AddHeader "pragma", "no-cache" 
    Response.AddHeader "cache-control", "private, no-cache, must-revalidate"
%>

    For ASP.NET markup:

    <%@ OutputCache Duration="-1" VaryByParam="none" %>

    For ASP.NET code behind:

    Response.Expires = -1;
Response.CacheControl = "no-cache";

    HTML (no guarantee browsers will honor meta tags)

    <head>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="expires" content="-1">
    <meta http-equiv="cache-control" content="private, no-cache, must-revalidate">
<head>
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