Don’t think that you don’t need to learn C language to do PHP

The reason why I say "Don't think that learning PHP does not require learning C language" is because you only learn PHP without any basic languages ​​​​such as C language. It is difficult to deeply understand many things in PHP without the support.

There are actually many such examples. Here I will give you this example: the difference and connection between PHP arrays and C language arrays.

Friends who have studied C language certainly know that there are arrays in C language;

There are also arrays in PHP, but their functions are almost completely different. PHP has too many arrays and is very easy to use. function. So what's the reason? Are there many kinds of arrays and you just learn one of them? Actually not.

The fundamental reason is: the array in C language is a real array, which is a continuous storage space applied for on the stack. Once this kind of space is applied for, you cannot add an element or delete an element. It can only be operated as a whole, either delete it all, or re-apply for an array. This is a real array.

The array in PHP is actually not such an array. It applies for memory in the heap, then uses a pointer to point to the head address, and then traverses the pointer, so that a certain element can be deleted and a new one can be added at any time. elements, because it is no longer a real array in nature, but a linked list.

So it can be seen from here that C language is of great significance to the understanding and learning of PHP. Without the linked list support of C language, the features of PHP will appear inexplicably, and you will always feel that you have no place to stand despite your fantasies.

The linked list principle in C language is the principle basis for realizing vector, list, map, and other dynamic arrays, linked lists, sets, and queues in C. It is also the principle basis for realizing arrays in PHP (essentially dynamic arrays implemented by linked lists). ) principle basis.

Then the understanding of the complex data structures of the upper-layer language will become logical. The operations on PHP arrays become easy to understand. For example:

Insert an element at the end:

##Pop up an element:

#These things are very comfortable to use and will not pop up a scary black window error message for you, but behind the comfort, you need a foundation to support it. It's its business to sacrifice compilation performance, but it's your business to understand it. If you can't understand it, you can only memorize it, which will be uncomfortable because it will be easy to forget.

How to avoid forgetting easily is to understand it, its origin, and the principles of its feasibility.... Only then will everything go naturally. No one stipulates that if you want to learn it, you have to learn it very painfully.

Knowing it but not knowing why is the biggest obstacle to success in learning and the biggest factor in learning bottlenecks.

So the significance of C language is to have an easier understanding of upper-level languages. Upper-level languages ​​such as PHP are not used to learn linked lists, but to use linked lists. So using PHP to write a linked list actually doesn't make much sense.

That's just an "academic show off" for beginners who have little experience. Because even pointers are hidden in PHP, how can we have a deep understanding of linked lists? It’s no wonder that those who learn C look down on those who learn C, and those who learn C look down on those who learn PHP; the difficulty is different. In the eyes of programmers with profound internal skills, many so-called experienced people are actually doing things to "grandstand", I guess. The feeling that it doesn't matter as long as it can fool beginners.

You must be good at associating in order to reduce the burden of learning. Only by paying attention to your learning mood can you achieve long-term results. Being good at understanding still requires a certain amount of strength, breadth and depth to support it.

So, don’t think that learning PHP means you don’t have to learn C language. Otherwise, it will be difficult for you to understand many things in PHP. Without a foundation, you can only rely on fantasy and recitation, and it will be difficult to learn deeply and for a long time. Because it is too tiring... At the same time, learning C language does not mean that you have passed the test after reading and learning it. The key is to know and understand it.

For example, can you explain what a linked list is to a person who doesn't understand computers? What are the characteristics, how to implement it, etc. How much you can say shows how much you know.

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