simpleXML - What does <<<XML mean?

PHP
1

Hello all,

I’ve seen this and I’m wondering what <<<XML means? What is it’s propose?


$xml = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"

I looked into google but couldn’t find a way to query this. <<< :s

Thanks in advance,
Márcio

2

A good example would be a string which requires single quotes, double quotes and variables.

Sure, sprintf etc could do it, but not without escaping - and escaping is something I dislike :stuck_out_tongue:

3

You see, I’d wrap a template object round that… :confused:

Overkill, possibly - but I don’t think so.

4

I’m a little OCD ( :stuck_out_tongue: ), and just find its use very strange and ugly. I’ve yet to see, what I consider, justified use of this feature.

Don’t get me wrong, I’m sure there are, but I haven’t seen any yet.

5

I’m not sure about what stream wrapper means, even with the php manual.
But it seems that if we use it, we need to establish the connection on a specific way. Well… on this case, only TCP/IP socket connections are allowed by the server.

Well… but we are getting off-topic. I will post specific questions when I start creating this EPP Protocol php Class. (this sounds really fancy :cool:, shame that I know so little about it). :lol:

K. Regards,
Márcio

6

It sucks!?

Can you please elaborate, I’m intrigued.

7

I’m also intrigued. I don’t use it often, but it does come in handy, eg code generation.

8

I’d argue if you had a lot of "'s to deal with, i.e non-code, what are they doing in your code in the first place…

You’re most welcome. :wink:

9

Have you thought of implementing a stream wrapper to take the ‘legwork’ out of it?

10

Good points. :slight_smile:

So can I go like:


$xml = simplexml_load_file("test.xml");
//and... here we goo...

Well, I’m not yet sure what best fits here.

The task that I have in hands is more or less like this:
Receive a frame from the server:
Remove the initial 4 bytes (that contain the length of the frame),
Read the XML that is returned.

Send a frame to the server:
Construct (or open) a XML file;
Adding the fields on specific nodes based on some rules.
Save or end the construction of the XML file.
Add the 4 bytes with the length and send the frame.

The frame, is the sum of:
the initial 4 bytes (containing the frame length, including this 4 bytes) + XML syntax.

And it’s according to this scenario that I’m not sure about what direction should I take.

(:

Márcio

11

Thanks. :slight_smile: Despite the strange and long sintax it seems to be nice for using when we have a lot of " and ‘’ to deal with.

Thanks again,
Márcio

12

It’s the HEREDOC syntax, it sucks. IMO. :eye:

13

I like HereDoc syntax for large sections of multiline output; Sometimes I use the C-style printf() function, othertimes HereDoc. I never come OUT of PHP unless I’m in a template file.