Ajax发送并添加隐藏字符

Question

I want to send something from one php site to another. At the first site, everything seems fine. The string seems like

--show="author,book,text/n

but when i check the string after receiving it looks like

--show="author,book,text/r/n

there is the problem, somehow it adds /r in the end.

First php:

$(document).ready(function() {
    $("#column_button").click(function(){
        var selected = [];
        $.each($("input[name='checkbox_columns']:checked"), function(){            
           selected.push($(this).val());
        });

        var data = new FormData();
        data.append("data", "--show=" + selected);
        //alert(JSON.stringify(selected));
        var ajax = (window.XMLHttpRequest) ? new XMLHttpRequest() : new activeXObject("Microsoft.XMLHTTP");
        ajax.addEventListener("load", statusHandler2, false);
        ajax.open( 'post', 'showParameter.php', true );
        ajax.send(data);
        _("column_button").disabled=true;        
    });
});

Second php:

if(!empty($_POST['data'])){
    $data = $_POST['data'];}

So selected shows it right, but if i check the $data in the second php, it's wrong.

Answer 1

This appears to be an issue where the servers are using different line ending types. Unix systems (Linux, BSD, etc) use \\n ( LF ) by default, MacOS uses \\r ( CR ) where as Windows systems use \\r\\n (also known as CRLF ). You may need to change your character encoding on one of the servers to the other.

CR = carriage return LF = line feed

You could use code that will substitute the CRLF or CR with just an LF. This page shows how you can achieve this simply.