concat two strings in JQuery

Question

Just like the title above: how to concatenate two strings in JQuery?

This is my code so far:

$(document).ready(function(){           
    serviceName = '<?=$_GET['services'] . ".php";?>';
    serviceID='<?= "#" .$_GET['services'];?>';
    serviceClass = '<?=$_GET['services'];?>';

    if (serviceName != "") {
        alert(serviceID);
        $('.main_content').load(serviceName);
        $(serviceID).addClass("it");
    }
});

As you can see in my above code, in variable name serviceID, I am concatenating hashtag and my GET value and I try to put it on ALERT and the result is correct, but when I assign it to .addClass it’s not working.

Any alternatives and solution is much appreciated.

Answer 1

I guess you meant that the PHP code should be evaluated before arriving to the client, therefore your code syntax is correct, but check out the following looks cleaner and also not polluting the global JavaScript scope (that's what the var ... is for):

var serviceClass = '<?="{$_GET["services"]}";?>';
var serviceName = serviceClass+'.php';
var serviceId = '#'+serviceClass;

but, since your code syntax is correct, you should verify that you actually have an element with serviceId as the id when your are executing it

if (($(serviceId)||[]).length) {
    alert('your element with the id:'+serviceClass+' exists');
}
else {
    alert('your element with the id:'+serviceClass+' doesn\'t exists');
}