Cannot send jQuery ajax() request to php -

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I have trouble using the AJAX () function. I have an HTML file with a form and it contains JavaScript code Is a section of: 

  & lt; Script & gt; $ (Document) .ready (function () {$ ("form"). Submit (function () {var url = "xxx.php /"; var param = $ ("# streetInput"). Serialize () + " Serialize (); htmlobj = $ .ajax ({url: url); & amp; , Data: Ultimate, Type: 'GET', Data Type: 'JSON', Success: Function (Output) {// Parsing Data Here}, Error: Function () {}});});}); & Lt; / Script & gt;

I should create a URL, pointing to a specific php file with the GET method. However, I do not know how to recover the parameter sent through the URL in the xxx.php file. I do not know how to debug, I just type 

  & lt ;? Php echo $ _GET ("streetInput"); Echo $ _GET ("cityInput"); ...... $ xml = simplexml_load_file ($ url); ? & Gt;

But it was not working. Can somebody help me out? I want to give xxx.php to the three parameters through the URL, then print those elements

In the p> xxx.php file, I create a URL for an API request and get an XML file back. And I want to convert $ xml file to JSON format and return to my HTML file.

In your JS code: 

  & lt; Script & gt; $ (Document) .ready (function () {$ ("form"). Submit (function () {var url = "xxx.php"} var param = $ ("# streetInput"). Serialize () + "& ;;; Param + = $ ("# cityInput"). Serialize () + "& amp;" Ultimate + = $ ("# stateInput"). Serialize (); $ .ajax ({url: url, data) : Ultimate, Type: 'GET'});});}); & Lt; / Script & gt;

Or, if you have only these field forms, then use it: 

  & lt; Script & gt; $ (Document) .ready (function () {$ ("form"). Submit (function () {var url = "xxx.php"} var param = $ (this) .serializeArray (); // & lt; - or, $ .jax ({url: url, data: ultimate, type: 'GET'});});} can also be used for .erialize (); & Lt; / Script & gt;

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