Simple AJAX Tutorial by Stephan Spies
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This is a very simple tutorial to understand Ajax-Requests and how it can work with . PDF 113 KB ajax-tutorial.pdf. All tutorial files
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Simple AJAX Tutorial by Stephan Spies tutorial: Simple form-submit using AJAX author: Stephan Spies info(at)optima-software(dot)de date: 2006/08/01 version 1.0. A. Description This is a very simple tutorial to understand Ajax-Requests and how it can work with PHP. What we try to do is: · Create a HTML-Form with some $_POST values, that can be sent to a php-file by a normal submit or, if Javascript is enabled, by an AJAX request. The result, of course, must be the same in both ways. · We would like to use the same PHP-function to answer the request, so there will be no redundant code. · At least, we will try to write down some JavaScript-functions that can be used in more than one form. Test-Script 1. Create a normal HTML-Form On the test-script you can see the form I created. It has a radio-select (male or femal, name: gender, values: m,f), an input-field (name: your_name), a select-field with two options ("I am coming" or "I am going", name:doing, values:come,go), a textarea for the "answer" and a submit botton. There should be no problem to create this form. Make shure that the textarea has an id named answer_id. Now, on the form-tag we need to call our ajax-funtion: 1. <form action="" method="post" 2. onsubmit="submitAjax('ajax-test.php', this, 'answer_id'); 3. return false;"> This will call our AJAX-function submitAjax() and, if everything is ok, give back false so the normal form-submit will NOT be executed. If AJAX-function fails, f.e. JavaScript is disabled, the normal form-submit will be executed instead. The variables that are give to the AJAX-function are: · index.php, the url to request · this, the form itself · answer_id, the id of the HTML-element, where the AJAX-answer has to be written. In our example it is a textarea field. But it can also be a div or anything else. Set an echo of a php-variable between the textarea-tags, so we can output our answer for the normal requests: 1. <textarea id="answer_id"> 2. <? echo $answer; ?> Document Outlineþÿþÿþÿþÿþÿ
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