Penalty one cup - PHP basics (1), Penalty one cup - PHP basics_PHP tutorial

Penalize yourself with a drink - PHP basics (1), Penalty a drink - PHP basics

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Lazy cancer is the most terrifying cancer, right? As we approach the year of your birth year, set a few things that you must do every day to become a habit, so that you won’t miss it again! !

PHP is something I have been learning, but I always thought that PHP is simple and the difficulty lies in the need to master a lot of relevant knowledge. In fact, this is not entirely true. PHP also has algorithms. PHP is also worth taking seriously. Now that I have decided to learn it , show some appearance, he must be a man.

1. PHP

1. PHP Basics (1)

1.1 Introduction

PHP=Hypertext Preprocessor=Hypertext Preprocessing Language;

Scripting language;

High execution efficiency (fast speed);

It can be big or small. Large websites often use more than one language. For example, Taobao, the front p and the back j seem to be;

As the saying goes: The three treasures of e-commerce are online, Alipay, and PHP;

Version issue: The latest version is currently PHP 7.0.0; I usually still use PHP5.

Environmental issues: Various integrated environments for windows, wamp, xampp, or self-built by Baidu; for Linux, I mentioned in my previous blog post that it is actually just a matter of a few lines of commands. Of course, the system versions are different, and the commands may be different. Similarities with minor differences, draw inferences from one instance~

1.2 Basic Grammar

--PHP tags

;

Born for html, nested in it;

Generally, in the compiler, do not write ?>, because it is easy to have spaces and other content that you do not want to output before the end tag; just delete it directly, and it will end automatically;

--Separate from HTML

aaaaaaaaa

bbbbbb

Generally, PHP tags can be well separated from HTML, but the above example is an exception - Advanced separation method using conditions ;

When the interpreter encounters an unfinished conditional statement, it will skip the mark and look for the corresponding thing (such as else);

Suitable for outputting large sections of text, more efficient than echo, etc.

In addition, other start and end tags can also be used, but it is recommended to

--Others

Comments: //Single line, /*Multiple lines;

Command separator: semicolon

I went to see a movie that I had been waiting for a month. I squeezed time and squeezed, and I only had an A cup. I will continue tomorrow!

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