What are colon, endif, endwhile, endfor in PHP, endwhileendfor_PHP tutorial

What are colon, endif, endwhile, endfor in PHP, endwhileendfor

We often see a lot of strange PHP syntax in the templates of blog programs such as wordpress, such as ：
empty

For quite a few PHP enthusiasts, they have never seen it before. What are these? Could it be that the blog developers themselves created a template language that imitates PHP?
No, in fact, these are PHP syntax, but they are not commonly used. These are alternative syntaxes for PHP process control.
Here I will give you a detailed explanation of the alternative syntax for PHP process control. What is alternative syntax?
To put it simply, it is some alternative ways of writing grammar.

What are the alternative syntaxes in PHP?
Flow control (including if, while, forforeach, switch) statements have alternative syntax.

Basic form of alternative syntax:
Replace the left curly brace ({) with a colon (:), replace the right curly brace (}) with endif;, endwhile;, endfor;, endforeach; and endswitch;

For example:

is a negative number

The above statement Equivalent to

is a negative number

Why is it almost invisible in pure PHP code?
These syntaxes are a bit inconsistent with the tradition of the C family and are a bit different. People are not used to this syntax, and it is not very convenient

No one is used to it, and what’s the use of having him so different? Does your balls hurt?
Existence is reasonable, and it has its own uses. The place where these syntaxes can be used is in the code of a mixed PHP and HTML page. The benefits are as follows:
1. Make the HTML and PHP mixed page code cleaner and neater.
What those friends who are obsessed with coding are most afraid of is messy mixed code. With these alternative syntaxes without braces, all friends who love cleanliness will be so happy that they pee.
2. The process control logic is clearer and the code is easier to read
If you want to change someone else's PHP and HTML mixed code, open it and find out, I will erase it! What a fucking rubbish! If alternative syntax is used, I think no matter how rubbish the program developer is, his writing will not be too messy.
3. Some friends who have transferred from ASP and other basic language families will find it easier to use PHP.

It’s useless to talk for a long time, how about we get something to do? How to use this thing?

Based on the previously described usage, the alternative syntax for the if statement is as follows:

equal to 5

equal to 5

either 5 or 6

while alternative syntax:

What is the point of loop

for alternative syntax:
;

What to loop

switch alternative syntax:

switch ($i): case 0: echo "i equals 0";
break;
case 1:
echo "i equals 1";
break;
case 2:
echo "i equals 2";
break;
default:
echo "i is not equal to 0, 1 or 2";
endswitch;
?>

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