... today in this short but useful article we will figure out how various program codes are commented. I won’t say much, because if you are interested in this, then you have already encountered the issues of this problem and have an idea about it.

You have come to the right place... but a few words for clarity and benefit of the matter. You've probably seen how this is done with CSS code, since CSS is of the greatest interest to many beginners, like me.

… Fine!

But note that comments are also used in html and php... But most beginners get confused at the initial stage of their work with the site and do not know how to add the necessary explanations to themselves. After all, it happens that, for example, you need to deactivate for some time html code, and then resume its function again - this is easy to implement if you have made notes in the “margins”, but you never know.

But what you should remember about “comments” in general is that everything strictly depends on which file you are working with specifically, and therefore the application code is different.

Commenting out the CSS code

a:hover, a:focus ( color: #D5071E; text-decoration: Overline; /*UNDERLINE TOP*/ )

This way you give yourself an explanation. Or you can even comment out this css script like this: just wrap

/* CODE here */

/*a:hover, a:focus ( color: #D5071E; text-decoration: underline; /*UNDERLINE BELOW*/ ​​)*/

I draw your attention to the fact that you can comment out the entire cycle of css code in this way, but!! then you will have to remove the repeated comments /*UNDERLINE AT THE BOTTOM*/, or play with slashes if the explanation is important))

Otherwise there will be an error!!

Note:

If you open the source code of the page - Ctrl+U and take a look... you will see that the commented piece of css code is perfectly displayed in the generated document! this is if css was used (properties were set) directly in html

And, as you understand, if you go from the source code via a link to the css document of your active template, all the comments can be observed and studied)) if anyone needs it. But this is unlikely)

English adverb (words) will be readable. Russian symbols - no.

Commenting the HTML code

The XML file is commented in the same way

Important: always check the code offered in articles, at least visually) otherwise there may be errors.

Simple carelessness when formatting can cost time, for example, the commented code shown above is often wrong: Instead of two short hyphens, a long dash appears:

For your information:

as mentioned in the previous remark, the same goes for commented... html code is displayed in the generated document!

Keep this in mind.

And here's another thing:

In addition to the fact that the commented code is displayed in the source code of the page (and therefore is processed in some sense, although it will be invisible on the page!) - it is better to remove some PHP functions in conjunction with html from the active document.

For example:

will be visible in the document and the functionwill do its job wonderfully: that is, the information will no longer be visible in the frontend, but in the source code it will be clearly displayed! and this is a pointless query to the database: all this is a trifle, but you need to know!

It’s possible to do this if you don’t want to remove a piece of code from the document:

add before the necessary “extra” html code the opening... built-in function ... and closing?> ...

In short, this is what you can do if the code is large:

**/ ?>

then the source will be clean!

Or simpler:

Let's comment out the function itself in the html document. The source code in these cases regarding the development of functions will be clean!

how to comment out javascript

if (beingShown || shown) ( // don"t trigger the animation again return; ) else ( // apply ANY COMMENT in the line // apply ANY COMMENT in the line // true;

For clarity, I grabbed this example JavaScript code from the internet, slightly correcting the punctuation. It doesn’t matter... The main thing is to understand the principle...

As you understand, the double slash “//” is a comment SIGN... SINGLE LINE!

The rest of the JS code is commented like php, more on that below:

remark:

Commenting the PHP code

...and...it’s similar here – slash-slash...one-line.

But note that it can be commented just like CSS code.

...or you can comment it out like this - a one-line version, when we use NOT TWO Slashes, but BECAR (hash) before the commented line:

...Naturally, you need to comment carefully in the code loop!

...or in this way - similar to the example shown above for CSS... i.e. this /* code */ commenting option is suitable for both CSS and JS codes!

But in this way you can comment out a more voluminous explanation of the PHP code, somewhere between its main examples...

You can also comment in PHP loops this way, if the code is mixed... php and somehow html

Same as described above:

For example, some such function... somewhere in the general code (or a loop in html):— you can comment it out, that is, add your own label like this:

or like this: one-line option...

Intelligence:

php code is not visible in any source codes!! Only its functional result is visible - working out!

That’s basically all I wanted to report today!

Now you can experiment... Good luck.

And of course, read the articles on the site and subscribe:
I share my bitter experience - some knowledge, for your sweet well-being))

...city of web masters Mihalika.ru© - easily with WordPress

Michael 2016-05-05 1 HTML and CSS 2

How to write html comments in code?

Today I will tell you how to make comments in code in HTML. Comments are a very useful thing. They do not in any way affect the execution of the code or the appearance of the pages, and they cannot be seen in the source code of the page. In fact, comments can only be seen by opening the file in the editor. In Notepad++ they are highlighted in green.

How to leave comments in html?

Very easy. The comment syntax in markup language is as follows:

Thus, you can comment out not only one line, but also several. The main thing to remember is that- closing. Inside such a construction, you can use either simply explanatory text or tags in angle brackets; the browser will not read them.

As I already said, the comment has the following features:

1. it is not visible on the page
2. and not in the source code either, but only when editing the file
3. all tags that are placed in it will not be processed by the browser in any way

What is it for

The main purpose of comments is to help other developers. During layout, you can explicitly indicate which part of the code forms the header and which forms the main part. Of course, experienced coders would have figured it out without this, but reading and understanding the code still improves. And comments also help people who do not understand html well to at least understand what is written a little. Here is an example of their use:

The second possible use of a comment is to make some piece of code inactive for a while, when you don’t want to delete it, but you need to somehow make its execution inactive. By the way, this can help identify various errors in the layout.

In general, one of the good qualities of any web developer is the ability to write beautifully designed and understandable code. This means that you need to use indents to show the nesting of elements, also leave comments if necessary, separate the main parts of the document with line breaks, etc. All this helps those who will edit the code in the future, as well as the author himself, who will not get lost in his own creation.

Before you learn how to make comments in HTML, you need to understand what they are for. If you are interested in such information, then you probably already know, so we will not dwell on this issue. Some people don't pay enough attention to the placement of comments in their code. In one-page sites, such an error may go unnoticed. But when it comes to huge portals, small comments will save time and make your life easier. Plus, notes allow other developers to understand your code when additional explanation is needed.

Target

Creating an HTML page is sometimes impossible without confusing codes and ever-repeating tags. New classes, selectors, id indicators, etc. All this can literally drive you crazy. HTML comments are designed to ease the plight of web developers. After all, when the site code stretches far down, it can be difficult to remember what is where. It is comments that help you make small notes directly in the html code that will not be visible to your users. Beginners rarely use this tag. But experienced specialists highlight the huge, useful property of comments. This tag is especially effective when several developers are working on the code at once. Instead of asking questions every time and interrupting your partner from work, you just need to look through the comments.

Creation

In order for a new line with a comment to appear in your code, you need to add the following entry:. This is exactly what this tag looks like in html. Whatever is inside it will not be displayed on the users' screen. Html comments should not stretch over several lines and contain any code (this is considered bad form). They should only provide some description of the developer's intent regarding the insertion of that particular tag, attribute, or value. Although there is an opinion among high-level masters that the code should be written in such a way that no additional explanations are required. But, unfortunately, not everyone has such a gift for writing HTML pages.

Peculiarities

Taghas some of its own characteristics. For example, you can add any other tags inside it, but you cannot create nested comments. This will lead to a not entirely expected result. Comments in html are widely used for testing web pages. For example, when you need to look at a site without a certain tag, but you cannot delete it, since it will be difficult to restore the entire source code. In this case, you just need to place the required part of the page in the comments. And then the tag will be ignored by the browser. But it is worth noting that all comments can be traced if you open the source code of the page. And every user can do this. Therefore, you should not place any important information inside this tag.

In this lesson I will talk about how to make comments in HTML, CSS, PHP. Comments are text that is not visible on the web page. They are used for various kinds of explanations, reminders, and descriptions for webmasters, which allows you to structure the document. Comments are indispensable when debugging code; they allow you to quickly navigate the markup of a web page and find the desired block. Comments are often used to debug HTML code. For example, you can temporarily comment out a specific block of code so that it is not executed, and if necessary, you can easily restore it.

Comments in HTML

In HTML, comments are formed using the following characters:. Thus, any text between these characters is a comment. Let's look at an example:

Example of comments in HTML

Comments in CSS

Comments in CSS are created using the characters: /* and */. To create a comment, you simply need to place the web page code between these characters:

/* Start of a block with styles for Body*/ body ( background: #efeded; font-family: Verdana, Helvetica, sans-serif; font-size: 12px; margin: 0px; padding: 0px; ) /* End of a block with styles for Body*/

Comments in PHP

Comments in PHP can be single-line or multi-line:

1) Single-line comments in PHP are created using the characters: //. Simply put this character in front of the line and it will be commented out. This option is used in the case when the comment consists of only one line.

2) To implement multi-line comments, the following symbols are used: /* and */. This option is useful if the comment spans several lines.

So we learned to do

Programs and games