Typical Example of php code optimization

The method I used is to differentiate blocks by key, assign the blocks to other variables, and then perform some operations. In this way, a lot of for and foreach are used, and the code is large, so it is returned.

After the guidance above, I found it really easy to share with you.

ID	FIELD1	FIELD2	FIELD3	FIELD4	Key
1	***	***	***	***	Meat1
2	***	***	***	***	Meat1
3	***	***	***	***	Meat1
4	***	***	***	***	Meat1
5	***	***	***	***	Fruit2
6	***	***	***	***	Fruit2
7	***	***	***	***	Fruit2
8	***	***	***	***	Fruit2
9	***	***	***	***	Fruit2
10	***	***	***	***	Food3
11	***	***	***	***	Food3

The result is as shown above.

Requirement: to operate on the array that has been sorted by key, the items with the same key are processed.

Tip: this is a typical parent-child table structure. That is to say, it is actually a combination of two tables. It can be processed into two arrays to facilitate block operations in the array.
Array1: ID | Key

ID	Key
1	Meat1
2	Meat1
3	Meat1
4	Meat1
5	Fruit2
6	Fruit2
7	Fruit2
8	Fruit2
9	Fruit2
10	Food3
11	Food3

Array2: key => array (ID, FIELD1, FIELD2, FIELD3, FIELD4, FIELD5, Key)

	ID	FIELD1	FIELD2	FIELD3	FIELD4	Key
Meat1 =>	1	***	***	***	***	Meat1
	2	***	***	***	***	Meat1
	3	***	***	***	***	Meat1
	4	***	***	***	***	Meat1
Fruit2 =>	5	***	***	***	***	Fruit2
	6	***	***	***	***	Fruit2
	7	***	***	***	***	Fruit2
	8	***	***	***	***	Fruit2
	9	***	***	***	***	Fruit2
Food3 =>	10	***	***	***	***	Food3
	11	***	***	***	***	Food3

Implement the preceding array separation code

In this way, it is very convenient to access the block data of tempArray.

Foreach ($ tempArray as $ row ){

Array1 [$ row ['id'] = $ row ['key'];

Array2 [$ row ['key'] [] = $ row;

}

Access and Process Code

Foreach ($ array1 as $ ID => $ Key ){

$ This-> doSomeThing ($ ID );

　　// Access the block array of tempArray $ array2 [$ Key]

$ This-> doSomeThing2 ($ Array2 [$ Key]);

}