资源解释为脚本，但使用MIME类型text / html：JSONP传输

In the following code, I get the error: JSFIDDLE

Resource interpreted as Script but transferred with MIME type text/html

$.ajax({
    url: "http://cob.cdcs.selu.edu/WEB-APP/VBF-Directory2/api/all.php?callback=?",
    async : false,
    jsonpCallback: 'jsonCallback',
    dataType: 'jsonp'
})
.done(function( data ) {
    console.log("Log :" + data);
});

Forgive me for being new with JSONP. I even looked up various resources on Stackoverflow and w3. I could not still figure out.

In the php file $array is an array and the only code that prints is:,

 echo json_ecode($array)

From my research, JSONP is not JSON. It actually should be JavaScript, and you need to wrap your results in the callback function call (callbackName(data);)

<?= $_GET['callback'] ?>(<?= jsonResult ?>);