As follows from the [Amazon documentation][1],

&gt; These names are the *object keys*. The name for a key is a sequence of
&gt; Unicode characters whose UTF-8 encoding is at most 1024 bytes long.

The max filename length is 1024 characters. If the characters in the name require more than one byte in UTF-8 representation, the number of available characters is reduced.


  [1]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-keys.html

I would like to rename file from `README` to `README.md`. What is the best practice to do that?

---
I have only one repo called &quot;change-z-index&quot;.

1) I open and login like that:

    ssh -T git@github.com

And I enter my passphrase.

2) I try to rename the file like that:

    git mv README README.md
    git commit -m &quot;renamed&quot;
    git push origin master

It gives me an error saying **bad source.**

I think I need to select my repo first... it&#39;s name is &quot;change-z-index&quot;. I have read manual many times, but still can&#39;t understand how to do it.

Rename file with Git

So I was wandering around [php.net][1] for information about serializing PHP objects to JSON, when I stumbled across the new [JsonSerializable Interface][2]. It&#39;s only **PHP &gt;= 5.4** though, and I&#39;m running in a 5.3.x environment.

How is this sort of functionality achieved **PHP &lt; 5.4**?

I&#39;ve not worked much with JSON yet, but I&#39;m trying to support an API layer in an application, and dumping the data object (*that would otherwise be sent to the view*) into JSON would be perfect.

If I attempt to serialize the object directly, it returns an empty JSON string; which is because I assume `json_encode()` doesn&#39;t know what the heck to do with the object. Should I recursively reduce the object into an array, and then encode *that*?

---
Example
===

    $data = new Mf_Data();
    $data-&gt;foo-&gt;bar[&#39;hello&#39;] = &#39;world&#39;;

**`echo json_encode($data)`** produces an empty object:

    {}

**`var_dump($data)`** however, works as expected:

    object(Mf_Data)#1 (5) {
      [&quot;_values&quot;:&quot;Mf_Data&quot;:private]=&gt;
      array(0) {
      }
      [&quot;_children&quot;:&quot;Mf_Data&quot;:private]=&gt;
      array(1) {
        [0]=&gt;
        array(1) {
          [&quot;foo&quot;]=&gt;
          object(Mf_Data)#2 (5) {
            [&quot;_values&quot;:&quot;Mf_Data&quot;:private]=&gt;
            array(0) {
            }
            [&quot;_children&quot;:&quot;Mf_Data&quot;:private]=&gt;
            array(1) {
              [0]=&gt;
              array(1) {
                [&quot;bar&quot;]=&gt;
                object(Mf_Data)#3 (5) {
                  [&quot;_values&quot;:&quot;Mf_Data&quot;:private]=&gt;
                  array(1) {
                    [0]=&gt;
                    array(1) {
                      [&quot;hello&quot;]=&gt;
                      string(5) &quot;world&quot;
                    }
                  }
                  [&quot;_children&quot;:&quot;Mf_Data&quot;:private]=&gt;
                  array(0) {
                  }
                  [&quot;_parent&quot;:&quot;Mf_Data&quot;:private]=&gt;
                  *RECURSION*
                  [&quot;_key&quot;:&quot;Mf_Data&quot;:private]=&gt;
                  string(3) &quot;bar&quot;
                  [&quot;_index&quot;:&quot;Mf_Data&quot;:private]=&gt;
                  int(0)
                }
              }
            }
            [&quot;_parent&quot;:&quot;Mf_Data&quot;:private]=&gt;
            *RECURSION*
            [&quot;_key&quot;:&quot;Mf_Data&quot;:private]=&gt;
            string(3) &quot;foo&quot;
            [&quot;_index&quot;:&quot;Mf_Data&quot;:private]=&gt;
            int(0)
          }
        }
      }
      [&quot;_parent&quot;:&quot;Mf_Data&quot;:private]=&gt;
      NULL
      [&quot;_key&quot;:&quot;Mf_Data&quot;:private]=&gt;
      NULL
      [&quot;_index&quot;:&quot;Mf_Data&quot;:private]=&gt;
      int(0)
    }

---

Addendum
===
1)
---

So this is the `toArray()` function I&#39;ve devised for the `Mf_Data` class:

    public function toArray()
    {
        $array = (array) $this;
        array_walk_recursive($array, function (&amp;$property) {
            if ($property instanceof Mf_Data) {
                $property = $property-&gt;toArray();
            }
        });
        return $array;
    }

However since the `Mf_Data` objects also have a reference to their parent (*containing*) object, this fails with recursion. Works like a charm though when I remove the `_parent` reference.

2)
---

Just to follow up, the final function to transform a complex tree-node object I went with was:

    // class name - Mf_Data
    // exlcuded properties - $_parent, $_index
    public function toArray()
    {
        $array = get_object_vars($this);
        unset($array[&#39;_parent&#39;], $array[&#39;_index&#39;]);
        array_walk_recursive($array, function (&amp;$property) {
            if (is_object($property) &amp;&amp; method_exists($property, &#39;toArray&#39;)) {
                $property = $property-&gt;toArray();
            }
        });
        return $array;
    }

3)
---

I&#39;m following up again, with a bit cleaner of an implementation. Using interfaces for an `instanceof` check seems much cleaner than `method_exists()` (*however `method_exists()` does cross-cut inheritance/implementation*).

Using `unset()` seemed a bit messy too, and it seems that logic should be refactored into another method. However, this implementation *does* copy the property array (*due to `array_diff_key`*), so something to consider.

    interface ToMapInterface
    {
    
        function toMap();
    
        function getToMapProperties();
    
    }
    
    class Node implements ToMapInterface
    {
    
        private $index;
        private $parent;
        private $values = array();
    
        public function toMap()
        {
            $array = $this-&gt;getToMapProperties();
            array_walk_recursive($array, function (&amp;$value) {
                if ($value instanceof ToMapInterface) {
                    $value = $value-&gt;toMap();
                }
            });
            return $array;
        }
    
        public function getToMapProperties()
        {
            return array_diff_key(get_object_vars($this), array_flip(array(
                &#39;index&#39;, &#39;parent&#39;
            )));
        }
    
    }
    

  [1]: http://php.net
  [2]: http://www.php.net/manual/en/class.jsonserializable.php

Serializing PHP object to JSON

Maybe I&#39;m blind but i can&#39;t find, in S3 documentation, the maximum file name length that can be uploaded in S3.

What is the maximum length of a filename in S3

<p>Maybe I'm blind but i can't find, in S3 documentation, the maximum file name length that can be uploaded in S3.</p>


I&#39;m building app on top of Amazon S3. How can I keep my S3 running under a set budget? Suppose I don&#39;t want unexpected traffic to over charge my AWS account. I&#39;d rather it remain unavailable.

Is there a way to set Amazon AWS billing limit?

Does anyone know how to do this? So far I haven&#39;t been able to find anything useful via Google.

I&#39;d really like to setup a local repo and use `git push` to publish it to S3, the idea being to have local version control over assets but remote storage on S3.

Can this be done, and if so, how?

Publish to S3 using Git?

I am trying to set up FTP on Amazon Cloud Server, but without luck.
I search over net and there is no concrete steps how to do it.

I found those commands to run:

    $ yum install vsftpd
    $ ec2-authorize default -p 20-21
    $ ec2-authorize default -p 1024-1048
    $ vi /etc/vsftpd/vsftpd.conf
    #&lt;em&gt;---Add following lines at the end of file---&lt;/em&gt;
    	pasv_enable=YES
    	pasv_min_port=1024
    	pasv_max_port=1048
    	pasv_address=&lt;Public IP of your instance&gt;
    $ /etc/init.d/vsftpd restart


But I don&#39;t know where to write them.

Setting up FTP on Amazon Cloud Server

From the AWS docs, I understand that:

- S3 key names can be any UNICODE name &lt; 1024 chars
- When using the GET OBJ, I need to URL encode the key name to access it.

However, these rules seem too permissive.

For instance, if I make a key called &#39;../../d&#39;, a 400 ERROR occurs when I attempt to access it with the GET OBJECT API. Interestingly, I have no problem accessing &#39;../d&#39;.

Is there a document specifying what is and is not legal?


What are valid S3 key names that can be accessed via the S3 rest API?

I have uploaded some files using the Amazon AWS management console.

I got an `HTTP 403 Access denied` error. I found out that I needed to set the permission to `view`.

How would I do that for all the files on the bucket?

I know that it is possible to set permission on each file, but it&#39;s time-consuming when having many files that need to be viewable for everyone.

Amazon S3 Permission problem - How to set permissions for all files at once?

I am able to issue commands to my EC2 instances via SSH and these commands logs answers which I&#39;m supposed to keep watching for a long time. The bad thing is that SSH command is closed after some time due to my inactivity and I&#39;m no longer able to see what&#39;s going on with my instances.

How can I disable/increase timeout in Amazon Linux machines?

The error looks like this:

    Read from remote host ec2-50-17-48-222.compute-1.amazonaws.com: Connection reset by peer

Amazon EC2 ssh timeout due inactivity

Is there a way to get AWS pricing programmatically (cost per hour of each instance type, cost per GB/month of storage on S3, and etc)?

Also, are there cost monitoring tools?  For example, is there a tool that can report your EC2 instance usage on an hourly basis (versus a monthly basis, which is what Amazon does)?

Thanks in advance.

Content Type	Original Author	Original Content on Stackoverflow
Question	ohe	View Question on Stackoverflow
Solution 1 - Amazon S3	S3 Browser Team	View Answer on Stackoverflow

What is the maximum length of a filename in S3

Amazon S3 Problem Overview

Amazon S3 Solutions

Solution 1 - Amazon S3

Serializing PHP object to JSON

Rename file with Git

Attributions