在单独的javascript函数中使用php网页上的变量值

Question

I have a server running which has a php function which returns true/false depending on input values. Currently I am just echoing the result on the page. I want to use this true/false in a to evaluate a condition in a javascript function running completely separately from the server.

Is there a javascript function I can use to get the text from a webpage and put it in a variable? I looked at the jquery load() function but this doesn't seem like it will work for this purpose.

Answer 1

Keep the output of the PHP script as simple as possible (a text response outputting only "true" or "false").

To send a text response (instead of an HTML response), you can use:

header("Content-Type: text/plain");

You have to call this function before outputting anything.

Now, assuming you can access the output of the script at the URL http://www.example.com/webpage.php

if($.ajax({type: "GET", url: "http://www.example.com/webpage.php", async: false}).responseText == "true")
{
    // do something
}
else // "false"
{
    // do something else
}