AJAX POST 和加号 (+)——如何编码? [英] AJAX POST and Plus Sign ( + ) -- How to Encode?

问题描述

我正在通过 AJAX 将表单字段的内容发布到 PHP 脚本，并使用 JavaScript 来escape(field_contents).问题是任何加号都被删除并被空格取代.如何安全地编码"加号，然后在 PHP 端适当地解码"它?

I'm POSTing the contents of a form field via AJAX to a PHP script and using JavaScript to escape(field_contents). The problem is that any plus signs are being stripped out and replaced by spaces. How can I safely 'encode' the plus sign and then appropriately 'decode' it on the PHP side?

推荐答案

在 JS 和 PHP 中使用 encodeURIComponent() 您应该会收到正确的值.

Use encodeURIComponent() in JS and in PHP you should receive the correct values.

注意:当您在 PHP 中访问 $_GET、$_POST 或 $_REQUEST 时，您正在检索已解码的值.

Note: When you access $_GET, $_POST or $_REQUEST in PHP, you are retrieving values that have already been decoded.

示例:

在你的 JS 中:

// url encode your string
var string = encodeURIComponent('+'); // "%2B"
// send it to your server
window.location = 'http://example.com/?string='+string; // http://example.com/?string=%2B

在您的服务器上:

echo $_GET['string']; // "+"

只有原始 HTTP 请求包含 url 编码数据.

It is only the raw HTTP request that contains the url encoded data.

对于 GET 请求，您可以从 URI 中检索它.$_SERVER['REQUEST_URI'] 或 $_SERVER['QUERY_STRING'].对于 urlencoded POST，file_get_contents('php://stdin')

For a GET request you can retrieve this from the URI. $_SERVER['REQUEST_URI'] or $_SERVER['QUERY_STRING']. For a urlencoded POST, file_get_contents('php://stdin')

注意:

decode() 仅适用于单字节编码字符.它不适用于完整的 UTF-8 范围.

decode() only works for single byte encoded characters. It will not work for the full UTF-8 range.

例如:

text = "u0100"; // Ā
// incorrect
escape(text); // %u0100 
// correct
encodeURIComponent(text); // "%C4%80"

注意:"%C4%80" 等价于:escape('xc4x80')

在UTF-8中代表Ā的字节序列(xc4x80).因此，如果您使用 encodeURIComponent()，您的服务器端必须知道它正在接收 UTF-8.否则 PHP 将破坏编码.

Which is the byte sequence (xc4x80) that represents Ā in UTF-8. So if you use encodeURIComponent() your server side must know that it is receiving UTF-8. Otherwise PHP will mangle the encoding.

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