Cara menggunakan php randomize array

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Questions : PHP Random Array with no duplicates
Answers 1 : of PHP Random Array with no duplicates
How do you generate a non repeating random number in PHP?
How do you make a random number not repeat?
How to pick random value from array in PHP?

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There are two functions to get random value out of an array in PHP. The shuffle() and array_rand() function is used to get random value out of an array.

Examples:

Input : $arr = ("a"=>"21", "b"=>"31", "c"=>"7", "d"=>"20")

// Get one random value
Output :7

Input : $arr = ("a"=>"21", "b"=>"31", "c"=>"7", "d"=>"20")

// Get two random values
Output : 21 31

Method 1: This method discuss the shuffle() function to get random value out of an array in PHP.
PHP | shuffle() Function: The shuffle() Function is an inbuilt function in PHP which is used to shuffle or randomize the order of the elements in an array. This function assigns new keys for the elements in the array. It will also remove any existing keys, rather than just reordering the keys and assigns numeric keys starting from zero.

Syntax:

bool shuffle( $array )

Example:

PHP

$arr = array( "a"=>"21", "b"=>"31", "c"=>"7", "d"=>"20" );

shuffle($arr);

echo $arr[0];

?>

In the above example the keys of associative array have been changed. The shuffle() function has randomly assigned keys to elements starting from zero. As shuffle() permanently change the keys of an array.

Method 2: Use array_rand() function to get random value out of an array in PHP. PHP | array_rand() Function: The array_rand() function is an inbuilt function in PHP which is used to fetch a random number of elements from an array. The element is a key and can return one or more than one key.

Syntax:

array_rand( $array, $num )

This function accepts two parameters $array and $num. The $array variable store the array elements and $num parameter holds the number of elements need to fetch. By default value of this parameter is 1.

Example 1:

`PHP`

$arr = array( "a"=>"21", "b"=>"31", "c"=>"7", "d"=>"20" );

$key = array_rand($arr);

echo $arr[$key];

?>

In the above example we didn’t explicitly specified the value for second parameter so by default the value is 1 and array_rand() will return one random key.

Example 2: This example explicitly specify the value for second parameter so array_rand() function will return the array of random keys.

`PHP`

$arr = array( "a"=>"21", "b"=>"31", "c"=>"7", "d"=>"20" );

$num = 2;

$keys = array_rand( $arr, $num );

echo $arr[$keys[0]]." ".$arr[$keys[1]];

?>

 
 Whether it is Web application, WAP or mobile application, random numbers have their applications. In the recent contact with several small projects, I often need to deal with random numbers or random arrays, so for PHP how to generate non-repeating random numbers commonly used in a summary of several methods (ps: methods 1, 4 and 5 are commonly used by me, and the rest come from network collation) 
Table of Contents
 Questions : PHP Random Array with no duplicates
 Answers 1 : of PHP Random Array with no duplicates
How do you generate a non repeating random number in PHP?
How do you make a random number not repeat?
How
to pick random value from array in PHP?
 Method 1: 



$numbers = range (1,50); 

//shuffle  Scramble the array order immediately  

shuffle ($numbers); 

//array_slice  Fetches a certain in the array 1 Segment  

$num=6; 

$result = array_slice($numbers,0,$num); 

print_r($result); 

?>

 Method 2: 



$numbers = range (1,20); 

// Sow the seeds of random number generator, optional, and have no effect on the results after testing 

srand ((float)microtime()*1000000); 

shuffle ($numbers); 

// Skip list No. 1 1 Values (the index is saved) 

while (list(, $number) = each ($numbers)) { 

echo "$number "; 

} 

?>

 Method 3: 



function NoRand($begin=0,$end=20,$limit=5){ 

$rand_array=range($begin,$end); 

shuffle($rand_array);// Call the ready-made array random arrangement function  

return array_slice($rand_array,0,$limit);// Before interception $limit A  

} 

print_r(NoRand()); 

?>

 The above can randomly generate 5 non-repeating values between 1 and 20 
 Method 4: 



$tmp=array(); 

while(count($tmp)<5){ 

$tmp[]=mt_rand(1,20); 

$tmp=array_unique($tmp); 

} 

print_r($tmp);

?>

 Method 5: 



$tmp = range(1,30);

print_r(array_rand($tmp,10));

?>

 This may be simpler than it is called (ps: If you specify a step size in range, you must pay attention to whether the second parameter of array_rand exceeds the length of $tmp). 
 PHP provides a very rich array function, most
random numbers can be generated from the perspective of arrays, if you have methods to provide, welcome to give, the article will continue to update. 
 Questions : PHP Random Array with no duplicates
2022-09-19T01:40:00+00:00 2022-09-19T01:40:00+00:00
606
I'm trying to get something right when I anycodings_php  reload the browser the array changes anycodings_php  randomly with no duplicate.
When I reload anycodings_php  the browser I saw duplicate array coming anycodings_php  randomly, please help me.
Here is the code

" . $fitness1[array_rand($fitness1)] . "

";echo $number++ . "

" . $fitness1[array_rand($fitness1)] . "

"; for ($i = 0; $i < $size; $i++){ } } ?>

Total Answers 1

29

Answers 1 : of PHP Random Array with no duplicates

$i = 0;
$number = 1;
do {
    shuffle($fitness1);
    echo "" . ($number++) ."" . array_shift($fitness1) ."";
    echo "" . ($number++) ."" . array_shift($fitness1) ."";
    $i++;
} while ($i < $size && !empty($fitness1));

shuffle() This function shuffles anycodings_php (randomizes the order of the elements anycodings_php in) an array Blockquote

So each time you reload the page, the anycodings_php order will be different

https://www.php.net/manual/en/function.shuffle.php anycodings_php

array_shift() shifts the first value of anycodings_php the array off and returns it, shortening anycodings_php the array by one.

https://www.php.net/manual/en/function.array-shift.php

Once the value is printed, it will be anycodings_php removed from the array. So no repeated anycodings_php values

0

2022-09-19T01:40:00+00:00 2022-09-19T01:40:00+00:00Answer Link

mRahman

How do you generate a non repeating random number in PHP?

php $check = array(); function generateNumber() { global $check; $page_no = mt_rand(1,20); $check[] = $page_no; if (count($check) !=

How do you make a random number not repeat?

Generate Random Number List With No Duplicates in Excel.

Select cell B3 and click on it..

Insert the formula: =RANDBETWEEN(10,30).

Press enter..

Drag the formula down to the other cells in the column by clicking and dragging the little “+” icon at the bottom-right of the cell..

How to pick random value from array in PHP?

The array_rand() function returns a random key from an array, or it returns an array of random keys if you specify that the function should return more than one key.

kode php PHP random number

Cara menggunakan php randomize array

PHP

PHP

PHP

Questions : PHP Random Array with no duplicates

Answers 1 : of PHP Random Array with no duplicates

How do you generate a non repeating random number in PHP?

How do you make a random number not repeat?

How to pick random value from array in PHP?

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