我也遇到了同样的问题，我就是这样做的。

/*PHP FILE*/

<?php

$data = file_get_contents('http://yourrssdomain.com/rss');
$data = simplexml_load_string($data);

$articles = array();

foreach($data->channel->item as $item){

    $articles[] = array(

        'title' => (string)$item->title,
        'description' => (string)$item ->description,
        'link' => (string)$item ->link, 
        'guid' => (string)$item ->guid,
        'pubdate' => (string)$item ->pubDate,
        'category' => (string)$item ->category,

    );  
}

// IF YOU PRINT_R THE ARTICLES ARRAY YOU WILL GET THE SAME KIND OF ARRAY THAT YOU ARE GETTING SO I CREATE AN OUTPUT STING AND WITH A FOR LOOP I ADD SOME CHARACTERS TO SPLIT LATER WITH JAVASCRIPT

$output="";

for($i = 0; $i < sizeof($articles); $i++){

    //# Items
    //| Attributes 

    if($i != 0) $output.="#"; /// IF NOT THE FIRST

// IF NOT THE FIRST ITEM ADD '#' TO SEPARATE EACH ITEM AND THEN '|' TO SEPARATE EACH ATTRIBUTE OF THE ITEM 

    $output.=$articles[$i]['title']."|";
    $output.=$articles[$i]['description']."|";
    $output.=$articles[$i]['link']."|";
    $output.=$articles[$i]['guid']."|";
    $output.=$articles[$i]['pubdate']."|";
    $output.=$articles[$i]['category'];
}

echo $output;

?>
/* php file */


/*AJAX COMUNICATION*/

$(document).ready(function(e) {

/*AJAX COMUNICATION*/

var prodlist= [];
var attrlist= [];

  $.ajax({  
      type: "get",  
      url: "php/fromupnorthrss.php",  
      data: {feeding: "feedstest"},
      }).done(function(data) {

        prodlist= data.split('#');

        for(var i = 0; i < prodlist.length; i++){

            attrlist= prodlist[i].split('|');

            alert(attrlist[0]); /// NOW I CAN REACH EACH ELEMENT HOW I WANT TO. 
        }
   });
});

我希望这能有所帮助。

Spudley的回答很好。

安全通知:您应该不再需要以下内容

如果你没有PHP 5.2，你可以使用这样的东西:

function js_str($s)
{
    return '"' . addcslashes($s, "\0..\37\"\\") . '"';
}

function js_array($array)
{
    $temp = array_map('js_str', $array);
    return '[' . implode(',', $temp) . ']';
}

echo 'var cities = ', js_array($php_cities_array), ';';

如果您需要将多维PHP数组直接打印到html页面源代码中，并以一种缩进的人类可读的Javascript对象符号(又名JSON)方式，请使用我在http://php.net/manual/en/function.json-encode.php#102091中找到的这个由绰号为“bohwaz”的人编写的漂亮函数。

<?php

function json_readable_encode($in, $indent = 0, $from_array = false)
{
    $_myself = __FUNCTION__;
    $_escape = function ($str)
    {
        return preg_replace("!([\b\t\n\r\f\"\\'])!", "\\\\\\1", $str);
    };

    $out = '';

    foreach ($in as $key=>$value)
    {
        $out .= str_repeat("\t", $indent + 1);
        $out .= "\"".$_escape((string)$key)."\": ";

        if (is_object($value) || is_array($value))
        {
            $out .= "\n";
            $out .= $_myself($value, $indent + 1);
        }
        elseif (is_bool($value))
        {
            $out .= $value ? 'true' : 'false';
        }
        elseif (is_null($value))
        {
            $out .= 'null';
        }
        elseif (is_string($value))
        {
            $out .= "\"" . $_escape($value) ."\"";
        }
        else
        {
            $out .= $value;
        }

        $out .= ",\n";
    }

    if (!empty($out))
    {
        $out = substr($out, 0, -2);
    }

    $out = str_repeat("\t", $indent) . "{\n" . $out;
    $out .= "\n" . str_repeat("\t", $indent) . "}";

    return $out;
}

?>       

我使用了一个伪php数组

<?php 
       // instead to create your array like this
       $php_array = ["The","quick","brown","fox","jumps","over","the","lazy","dog"];

       // do it like this (a simple variable but with separator)
       $php_fake_array = "The,quick,brown,fox,jumps,over,the,lazy,dog";
?>

<script type="text/javascript">

        // use the same separator for the JS split() function
        js_array = '<?php echo $php_fake_array; ?>'.split(',');

</script>

如果你的数组是未知的(已经创建)

<?php 
        $php_array = file('my_file.txt');
        $php_fake_array = "";

        // transform your array with concatenate like this
        foreach ($php_array as $cell){

            // since this array is unknown, use clever separator
            $php_fake_array .= $cell.",,,,,"; 
        }
?>

<script type="text/javascript">

        // use the same separator for the JS split() function
        js_array = '<?php echo $php_fake_array; ?>'.split(',,,,,');

</script>

您不必调用parseJSON，因为json_encode的输出是javascript文字。只要把它赋给一个js变量。

<script type="text/javascript">
    //Assign php generated json to JavaScript variable
    var tempArray = <?php echo json_encode($php_array); ?>;

   //You will be able to access the properties as 
    alert(tempArray[0].Key);
</script>

下面是一个将PHP数组转换为JavaScript数组的非常简单的技巧:

$array = array("one","two","three");

JS下面:

// Use PHP tags for json_encode()

var js_json =  json_encode($array);
var js_json_string = JSON.stringify(js_json);
var js_json_array = JSON.parse(js_json_string);

alert(js_json_array.length);

这招很管用。