By Bogdan Brinzarea-Iamandi; Audra Hendix; Cristian Darie
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Commonplace companies use dozens, countless numbers, and infrequently even hundreds of thousands of functions, elements, companies, and databases. a lot of them are customized outfitted in-house or by way of 3rd events, a few are received, others are in accordance with open resource tasks, and the starting place of a few--usually the main severe ones--is thoroughly unknown.
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6. The user display is updated with the new message from the server, but the user can continue typing without any interruptions. After a delay of one second, the process is restarted from step 2. [ 33 ] The World of AJAX and PHP Summary This chapter was all about a quick introduction to the world of AJAX. In order to proceed with learning how to build AJAX applications, it's important to understand why and where they are useful. As with any other technology, AJAX isn't the answer to all problems, but it offers powerful means to address some of them.
GetAllResponseHeaders() Returns the response headers as a string. getResponseHeader("headerLabel") Returns a single response header as a string. open("method", "URL"[, asyncFlag[, "userName"[, "password"]]]) Initializes the request parameters. send(content) Performs the HTTP request. setRequestHeader("label", "value") Sets a label/value pair to the request header. onreadystatechange Used to set the callback function that handles request state changes. [ 60 ] Chapter 2 Method/Property readyState Description Returns the status of the request: 0 = uninitialized 1 = loading 2 = loaded 3 = interactive 4 = complete responseText Returns the server response as a string.
AJAX and PHP : building modern web applications by Bogdan Brinzarea-Iamandi; Audra Hendix; Cristian Darie