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Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...risks before using this code.
It's very simple to solve if you are using PHP. Just add the following script in the beginning of your PHP page which handles the request:
<?php header('Access-Control-Allow-Origin: *'); ?>
If you are using Node-red you have to allow CORS in the node-red/sett...
Generate random 5 characters string
...tuvwxyz"), 0, $length);
more details: http://forum.arnlweb.com/viewtopic.php?f=7&t=25
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How to get the request parameters in Symfony 2?
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It is different from what PHP uses, but it actually makes more sense. $_GET data is data from the query string (no GET request needed at all) and $_POST data is data from the request body (does not have to be a POST request either, could be PUT).
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Single Sign On across multiple domains [closed]
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There is a master domain, login.mydomain.com with the script master_login.php that manages the logins.
Each client domain has the script client_login.php
All the domains have a shared user session database.
When the client domain requires the user to be logged in, it redirects to the master domain ...
Are there any JavaScript static analysis tools? [closed]
...s answer) I have have also gotten a lot of benefit from running JSHint and PHP CodeSniffer. As of 2012, all four tools are free open-source and have a large and active developer community behind them. They're each a bit different (and I think, complementary) in the kinds of checks they perform:
JS...
Copy Notepad++ text with formatting?
... supports
syntax highlighting of different code files "out of the box" - PHP
included!
Download & install it, fire it up, and load up your PHP file. You
should automatically see it beautifully coloured (if not, because the
file extension is something other than .php, go to Language ...
How to get ID of the last updated row in MySQL?
How do I get the ID of the last updated row in MySQL using PHP?
12 Answers
12
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使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...接。 因此，我们开发蓝牙 LE 组件是为了解决物联网连接问题。
三． 技术方法
BluetoothLE 组件是 MIT App Inventor 的新颖补充。 如图 4 所示，在 MIT App Inventor 平台上创建时，BLE 组件可以作为移动应用程序的一部分实现。 然后，该...
In where shall I use isset() and !empty()
...riables and not just values, so isset("foobar") will raise an error. As of PHP 5.5, empty supports both variables and expressions.
So your first question should rather be if isset returns true for a variable that holds an empty string. And the answer is:
$var = "";
var_dump(isset($var));
The typ...
appending array to FormData and send via AJAX
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You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Serialize the data with, then deserialize in PHP
JS
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