What are the methods of php array function

In PHP, array is a very useful data type. Arrays can store multiple values ​​and retrieve these values ​​by index or key. In order to better operate arrays, PHP provides a wealth of array functions. The following are commonly used array functions:

1. array() function: Create an array.
2. count() function: counts the number of elements in the array.
3. print_r() function: prints all elements of the array for debugging.
4. sort() function: Arrange the elements in the array in ascending order.
5. rsort() function: Arrange the elements in the array in descending order.
6. asort() function: Arrange the elements in the associative array in ascending order of value.
7. arsort() function: Arrange the elements in the associative array in descending order of value.
8. ksort() function: Arrange the elements in the associative array in ascending order by key name.
9. krsort() function: Arrange the elements in the associative array in descending order by key name.
10. array_sum() function: Calculate the sum of all elements in the array.
11. array_merge() function: Merges two or more arrays into one array.
12. array_key_exists() function: Check whether the specified key name exists in the array.
13. in_array() function: Check whether the specified value exists in the array.
14. array_search() function: Search the specified value in the array and return its key name.
15. array_slice() function: Extract specified elements from the array.
16. array_splice() function: delete and replace specified elements in the array.
17. array_unique() function: remove duplicate elements from the array.

In addition, there are many powerful array functions available. The usage and syntax of PHP array functions are very simple. We can easily use these functions to process arrays and complete various tasks. .

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