Should I use method="POST" or "post" in HTML form?

Question

I want to handle data with PHP by post method and I want to know if both ways ("post" and "POST") are recommended.

Should I use method="POST" or method="post" in HTML form?

Thanks.

HTML attribute names and attribute values are case-insensitive, if that's your question. — lafor, May 22 '14 at 23:18
@lafor Not if a form contains `name="Email"` as opposed to `name="email"` — Funk Forty Niner, May 22 '14 at 23:24
Capitalization of some things matters, due to the XHTML standard. See my answer. — developerwjk, May 22 '14 at 23:37
I don't think it really matters on how it's spelled, as long as it's `Post` `POST` or `post` — Jonco98, May 23 '14 at 00:27
they are case-incensitive, most programmers use captial case for the methods and as long as you remain consistent you should be fine. — , May 23 '14 at 03:25
https://stackoverflow.com/a/45834938/498634 is a more recent answer with references to today's standards. — Daniel Böhmer, Jan 30 '19 at 10:12

developerwjk · Accepted Answer · 2014-05-22T23:36:01.200

5

Better to stick with lowercase so you aren't tempted to type all your tags and attributes as if you're shouting at the browser. Also, you should be coding your modern HTML to the XHTML standard, not to 90s HTML.

This is the 90s way: <FORM METHOD="POST" ACTION="">

Today its advised to use lowercase for tags and attributes, although for the values of the attributes do whatever you want: <form method="post" action="">, <form method="POST" action="">

Why? Because of XHTML. For a document to be valid XHTML the spec says:

4.2. Element and attribute names must be in lower case

XHTML documents must use lower case for all HTML element and attribute names. This difference is necessary because XML is case-sensitive e.g. <li> and <LI> are different tags.

Of course for ids and names like in <input id='x' name='product_id' /> the capitalization matters as <input id='X' name='Product_Id' /> the id is different to the DOM and the name sent to the server is now different.

edited May 22 '14 at 23:36

answered May 22 '14 at 23:30

developerwjk

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XHTML has lost its relevancy. Since HTML5 the normalized serialization is sufficient. Unless you actually utilize different XMLNSes, synthetic attribute quotes and strict casing are causeless bells and whistles. – mario May 22 '14 at 23:41
@mario, Until you want to parse your HTML with an XML parser to make some changes to it programmatically or extract some things. I prefer not having to go back and clean that up first. – developerwjk May 23 '14 at 18:46
I'd rather use a HTML parser frontend than a XML one on HTML. – mario May 23 '14 at 18:51

score 0 · Answer 2 · answered May 22 '14 at 23:18

0

It doesnt matter, HTML isnt case sensitive though its more common to capitalize it.

answered May 22 '14 at 23:18

meda

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*"HTML isnt case sensitive"* --- No, and yes. Just not in this case, but variables are, as are PHP variables. `$var` and `$Var` are two different animals altogether. OP might get the wrong impression. – Funk Forty Niner May 22 '14 at 23:21
1

Yes PHP indeed case sensitive. – meda May 22 '14 at 23:24
That's `not` my -1 btw. – Funk Forty Niner May 22 '14 at 23:40
Thats cool, i have no hard feelings lol – meda May 23 '14 at 00:37
1

You're a real sport ;-) – Funk Forty Niner May 23 '14 at 00:38

Should I use method="POST" or "post" in HTML form?

2 Answers2