JQuery成功导致 字符

Question

I have these characters in my results.
The same code works fine on another page.

This is my PHP:

// Insert Data $queryData = $db->prepare("INSERT INTO tbl_Category (Status, Parent, Name) VALUES (?, ?, ?)");

$insertData = $queryData->execute (
    array (
        $Status,
        $Parent,
        $Name,
    )
);

if(insertData) { echo "success"; } else { echo "error"; }

This is my JQuery:

$.ajax({
    type:'POST',
    url:"ajax/Category.php?ajaxPost=newCategory",
    data:$('form#frmAction').serialize(),
    success: function(result){
        if(result == "success")
        {
            alert("ok ");
        }
        else if(result == "error")
        {

        alert("püff");
        }
    }
});

This is what the Firefox Debugger shows

And my result is:

result = "success
" 

Answer 1

refer to the end of the string characters. Interacting between JavaScript and PHP using ajax is usually implemented using json, which is a data format supported widely by all programming languages.

You may refactor your code as follows. The die() function is used to ensure no extra output is printed by the PHP script, since this would result in invalid json syntax.

category.php

if($insertData) { 
    die(json_encode(['result' => true])); 
} else { 
    die(json_encode(['result' => false, 'errorMessage' => 'Optional error message goes here.'])); 
}

jQuery

Note: I have used the $.post() function, this is a shorthand for $.ajax(type: 'POST').

$.post('ajax/Category.php?ajaxPost=newCategory', $('form#frmAction').serialize(), function(r) {
    if(r.result) {
        alert("OK");
    } else {
        alert("Something went wrong: " + r.errorMessage);
    }
}, 'json');