Detailed introduction and usage of flip function

Example to reverse the key names in the array and the corresponding associated key values: "red","b"=>"green","c"=>"blue","d"=>"yellow"); $result=array_flip($a1); print_r($result); ?>Definition and usage The array_flip() function is used to reverse/exchange the key names in the array and the corresponding associated key values. Syntax array_flip(array); Parameter description array is required. Specifies the array whose key/value pairs need to be reversed. Technical details Return value: If the inversion is successful, the reversed array is returned. If the reversal fails, NULL is returned. PHP version: 4 Note that the value in trans needs to be a legal key name, for example

1. php is used to reverse/exchange the key names in the array and the corresponding associated key values. Function array_flip()

Introduction: The array_flip() function is used to reverse/exchange the key names in the array and the corresponding associated key values. If the reversal is successful, the reversed array is returned. If the reversal fails, NULL is returned.

2. php array_flip(Function to delete duplicate elements from array Detailed example example

Introduction: In PHP, used for There is a function available to delete duplicate elements in an array, which is array_unique(), but it is not the most efficient method. Using the array_flip() function will be about five times faster than array_unique() #.

##3. 10 recommended articles about flip()

##Introduction: The method is as follows: $arr = array(…………);//Suppose there are 10,000 elements in the array, with repeated elements in it $arr = array_flip(array_flip($arr)). ; //In this way, duplicate elements can be deleted.  What exactly is going on? Let’s look at the function of array_flip(): array_flip() is used to exchange the key and value of each element of an array, such as:   $arr1 = array (”...

4.

10 recommended articles about array_flip()

Introduction: The method is as follows: $arr = array(…………);//Suppose there is an array of 10,000 elements with repeated elements.  $arr = array_flip(array_flip($arr)); //This way you can delete duplicate elements.  What exactly is going on? Let’s look at the function of array_flip(): array_flip() is used to convert an array. Exchange the key and value of each element, such as: $arr1 = array (”...

##5.

Detailed introduction to the array_flip function

Introduction: The method is as follows: $arr = array(…………);//Assume there are 10,000 elements There are duplicate elements in the array. $arr = array_flip(array_flip($arr)); //This way you can delete duplicate elements. Let’s look at the function of array_flip(): Exchange the key and value of each element of an array, such as: $arr1 = array ("age" => 30, "name" => "Happy Garden"); $arr2 = array_flip($arr1);/ /$arr2

6.

php array_flip() Delete duplicate elements from the array

##Introduction: In PHP, there is a function available for deleting duplicate elements in an array, which is array_unique(), but it is not the most efficient method. Using the array_flip() function will be better than array_uniqure() is about five times faster.

7. php uses the array_flip() function to delete duplicate elements in the array

Introduction: Summary: In PHP, there is an available function to delete duplicate elements in an array, which is array_unique(), but it is not the most efficient method. Using the array_flip() function will be better than array_unique() About five times faster. ...

8. arrays.sort PHP array_flip special function to delete duplicate array elements

Introduction: arrays. sort:arrays.sort PHP array_flip special function for deleting duplicate array elements: Description array array_flip (array trans) Array_flip() returns a reversed array, for example, the key name in trans becomes the value, and the value in trans becomes Key name. Note that the value in trans needs to be a legal key name, for example, it needs to be integer or string. A warning will be emitted if the value is of the wrong type, and the key/value pair in question will not be reversed. If the same value appears multiple times

9. array_slice and array_flip in php array functions

Introduction:: array_slice and array_flip in php array functions: Let’s look at array_slice first. The function of array_slice is to take out a part of the array. There are two ways to use it: $arr=array(a=>aa,b=>bb,c=>cc ,d=>dd);//Starting from the first data in the array (the array itself starts from 0), take two items. $tmp=array_slice($arr,1,2); showObj($tmp); //Start from the third last data in the array and take the next two items: $tmp=array_sl

10. php array_flip() Delete duplicate elements from array_PHP tutorial

Introduction: php array_flip() removes duplicate elements from an array. The method is as follows: $arr = array(…………);//Suppose there is an array of 10,000 elements with repeated elements. $arr = array_flip(array_flip($arr)); //This will remove duplicate elements.

11. PHP array_flip() Special function to delete duplicate array elements_PHP tutorial

Introduction: PHP array_flip( ) Special function for removing duplicate array elements. Description array array_flip (array trans) array_flip() returns a reversed array, for example, the key names in trans become values, and the values ​​in trans become key names. Pay attention to the value in trans

12. php array function sequence array_flip() swaps the array key name and value_PHP tutorial

Introduction: PHP array function sequence array_flip() swaps the array key names and values. array_flip() Definition and Usage The array_flip() function will swap the keys of an array with their corresponding values, that is, the keys become values, and the values ​​become keys. The array_flip() function returns an inverted value

13. Analysis of the role of the PHP function array_flip() in deleting duplicate array elements_PHP tutorial

Introduction: Analyze the role of PHP function array_flip() in deleting duplicate array elements. We all know that there are many ways to delete array elements in PHP. The commonly used function is array_unique() in PHP. So the PHP function array_flip() we introduce to you today is in

14. The role of PHP function array_flip() in deleting duplicate array elements_PHP tutorial

Introduction: The role of PHP function array_flip() in deleting duplicate array elements. We all know that the PHP function array_flip() format: arrayarray_flip(arraytrans) //array_flip--Exchange the keys and values ​​in the array array array_flip (array trans) //array_flip--Exchange the array

15. php-Arrays function-array_flip-exchange the keys and values ​​in the array_PHP tutorial

Introduction: php-Arrays function-array_flip-exchange array Middle keys and values. The array_flip() function exchanges the keys and values ​​in the array [Function] This function will return a reversed array, that is, the values ​​of the original array become the key values ​​of the new array, and the key values ​​of the original array become the new

16. php array_flip() and array_uniqure() to remove duplicate elements from an array_PHP Tutorial

Introduction: php array_flip() and array_uniqure() remove duplicate elements from the array. There are several functions to delete duplicate elements from an array in PHP. One is array_unique() and the other is array_flip() and array_uniqure() functions, but the latter is several times more performant than the former, so I will only introduce

17. How to learn PHP array_flip()_PHP tutorial

Introduction: How to learn PHP array_flip(). How to learn PHP array_flip() Definition and Usage The array_flip() function returns a reversed array. If the same value appears multiple times, the last key name will be its value, and all other

18. Codeforces Round #191 (Div. 2)-A. Flipping Game_html/css_WEB-ITnose

Introduction: Codeforces Round #191 (Div. 2)-A. Flipping Game

19. CSS3 to achieve flipping (Flip) effect_html/css_WEB-ITnose

Introduction: CSS3 realizes flip effect

20. CSS3 animation (3): transform realizes multi-flip animation_html/css_WEB-ITnose

Introduction: CSS3 animation (3): transform implements multi-flip animation

21. php array_flip() deletes duplicate elements from the array

Introduction: php array_flip() removes duplicate elements from an array. The method is as follows: $arr = array(…………);//Suppose there is an array of 10,000 elements with repeated elements. $arr = array_flip(array_flip($arr)); //This will remove duplicate elements.

22. php array function sequence array_flip() swaps the array key name and value

Introduction: php The array_flip() array function sequence swaps the array key names and values. array_flip() Definition and Usage The array_flip() function will swap the keys of an array with their corresponding values, that is, the keys become values, and the values ​​become keys. The array_flip() function returns an inverted value

23. Analysis of the role of the PHP function array_flip() in deleting duplicate array elements

Introduction: Analyze the role of PHP function array_flip() in deleting duplicate array elements. We all know that there are many ways to delete array elements in PHP. The commonly used function is array_unique() in PHP. So the PHP function array_flip() we introduce to you today is in

24. The role of PHP function array_flip() in deleting duplicate array elements

Introduction: The role of PHP function array_flip() in deleting duplicate array elements. We all know that the PHP function array_flip() format: arrayarray_flip(arraytrans) //array_flip--exchange the keys and values ​​in the array array array_flip (array trans) //array_flip--exchange the array

25. php-Arrays function-array_flip-exchange the key and value in the array

Introduction: php-Arrays function-array_flip-exchange the key and value in the array value. The array_flip() function exchanges the keys and values ​​in the array [Function] This function will return a reversed array, that is, the values ​​of the original array become the key values ​​of the new array, and the key values ​​of the original array become the new

【Related Q&A Recommendation】:

ios - Ask about an animation similar to the sinking effect when the box of flipboard is opened to detail

javascript - What is the principle of flip.js?

javascript - Ask about the JS technology implementation principle of the HTML5 poster scene on the first page

eclipse - ViewFlipper dynamically loads network images

css3 - [CSS] Animation effect 3D flip bug