Is it possible for a JavaScript .execute function to be executed synchronously, or can it be transformed into an Ajax

Currently, I am utilizing the ArcGIS API for Javascript which can be found at this URL:

The JavaScript code snippet I'm working with appears to be running asynchronously. Is there a way to convert it to run synchronously or potentially transform it into synchronous Ajax?

I have been struggling to locate detailed information on the .execute command.

It is imperative that the code runs synchronously so that PHP can scrape the final result (the output will ultimately be either 'true' or 'false,' alert is currently being used for debugging purposes)

var identifyTask = new esri.tasks.IdentifyTask("http://website.here");
var identifyParams = new esri.tasks.IdentifyParameters();
identifyParams.tolerance = 0;
identifyParams.returnGeometry = true;
identifyParams.layerIds = [layerID];
identifyParams.width = map.width;
identifyParams.height = map.height;
identifyParams.geometry = geom;
identifyParams.mapExtent = map.extent;

identifyTask.execute(identifyParams, function(results) {
    if (results.length == 0) {
        alert('true');
    } else {
        alert('false');
    }
});

Answer №1

The API documentation found here does not specify synchronous execution.

It operates solely with a callback and events like onComplete and onError.

The execute() method is not part of the standard Javascript library. Make sure to indicate in your code example that you are using the esri library. Searching for "esri javascript" led me to the API site where I found what you're using in your code.

Your mention of wanting PHP to scrape the results doesn't seem logical. JavaScript runs on the client side, while PHP functions on the server side. Please explain how PHP would be involved in scraping results and why the sync functionality would matter in this scenario.

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