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@NogDogJun 20.2011 — #An "AJAX " implementation of JavaScript plus a PHP script on the server called by that AJAX Javascript can allow you to only update part of the page without having to do a complete reload of the parts of the page that do not need to change. This means less information to transfer from the host to the browser on each such update, and the browser then only has to change the content of a specific portion of the page.
Whether or not it makes sense to do this in any specific case is for you to decide based on your particular circumstances and requirements.@NogDogJun 20.2011 — #The difference is that the meta refresh reloads the entire page, whereas a JavaScript/AJAX call can just update one particular part of the page (e.g. a news headline listing, stock quotes, stuff like FaceBook does to show new message/comment indicators and show new posts in the middle column, and so on).
You don't [i]have[/i] to use AJAX, just like you don't [i]have[/i] to use meta refresh tags. You [i]should[/i] understand how each works, so that you can decide to use either tool (or not) for any given situation where it might be the right tool to use.
php with javascript?
Hi I am pulling items from a mysql database generally with php. Some told me if I connect javascript to php code that does that, then can pull it at any timings I want. But what would be the point of that when I can just put a
<meta http-equiv=”refresh” content=”30″> like for 30 seconds in a page or something, to choose the timing?
Also since it really isn’t doing anything different than the javascript to it, since a meta refresh does that same thing.
Also wouldn’t that be a bad idea connecting javascript to the php also, since mysql data must be pulled from a database with php anyway. I was told javascript cannot pull mysql data into a page only php can. Since php code is already in a page anyway, wouldn’t that also be a bad idea because then wouldn’t work for those with browser javascript disabled, if javascript is connect to the php for mysql.
Anyway I don’t know what the point is, can anyone tell me what advantage there is for timing, to connect javascript to php code that pulls items from a mysql database?? Please let me know thanks a lot to you.
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@NogDogJun 20.2011 — #An "Whether or not it makes sense to do this in any specific case is for you to decide based on your particular circumstances and requirements.
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@NogDogJun 20.2011 — #The difference is that the meta refresh reloads the entire page, whereas a JavaScript/AJAX call can just update one particular part of the page (e.g. a news headline listing, stock quotes, stuff like FaceBook does to show new message/comment indicators and show new posts in the middle column, and so on).You don't [i]have[/i] to use AJAX, just like you don't [i]have[/i] to use meta refresh tags. You [i]should[/i] understand how each works, so that you can decide to use either tool (or not) for any given situation where it might be the right tool to use.