php associative array select 1 random value with key

Question

I need to random a single element from the array. I have code ;

     if (isset($_POST['losuj'])) {
   $arr = [
   'chleb' => 'skiny/1.jpg',
   'mienso' => 'skiny/2.jpg',
   'mienso2' => 'skiny/2.jpg',
   'mienso3' => 'skiny/2.jpg',
   'mienso4' => 'skiny/2.jpg',
   'mienso5' => 'skiny/2.jpg',
   'Hasasdasd' => 'skiny/2.jpg',
   ];

     foreach($arr as $key => $value) {
        $keys = array_rand( $arr, 1);
        echo $keys;
     }
 }

And its didnt working. Any tips ?

`$keys` variable displaying what? Refer this http://php.net/manual/en/function.array-rand.php — KMS, Jan 29 '18 at 12:18
What do you mean by didn't work? If you are looking for a single random element remove the foreach and simply use the call to array_rand once. — Dave, Jan 29 '18 at 12:26
Possible duplicate of [Selecting a random element from a PHP associative array](https://stackoverflow.com/questions/7209127/selecting-a-random-element-from-a-php-associative-array) — splash58, Jan 29 '18 at 14:08

Andreas · Accepted Answer · 2018-01-29T13:12:24.030

1

You can use array_keys to get the keys in a indexed array.
The just use array_rand just like you did to pick one and echo the $arr associative key.

$keys = array_keys($arr);
$random = $keys[array_rand($keys,1)];
Echo $random . " => " . $arr[$random];

https://3v4l.org/miacb

edited Jan 29 '18 at 13:12

answered Jan 29 '18 at 12:21

Andreas

23,610
6
30
62

I need to have got value and key not only .jpg file. – Season6 Jan 29 '18 at 12:28
@Season6 See edit. Is that what you are looking for? – Andreas Jan 29 '18 at 13:12
Yes ! Thanks very much :D – Season6 Jan 29 '18 at 13:58

score 0 · Answer 2 · answered Jan 29 '18 at 12:18

0

Just use array_rand($arr,1) without foreach loop

answered Jan 29 '18 at 12:18

Kuba Zabielski

146
2
10

Notice: Array to string conversion in E:\xampp\htdocs\csgolos\freeCase.php on line 65 – Season6 Jan 29 '18 at 12:19
`$a = array_rand($arr,1);` `echo $a[0];` – Kuba Zabielski Jan 29 '18 at 12:20
Then this only echo the first letter of the key if we have got chleb then the echo gives - c – Season6 Jan 29 '18 at 12:22
`$a = array_rand($arr,1);` `echo $a`. It's working for me – Kuba Zabielski Jan 29 '18 at 12:28

score 0 · Answer 3 · answered Jan 29 '18 at 12:21

With PHP we can use the function array_rand()

More information can be found at:

http://php.net/manual/en/function.array-rand.php https://www.w3schools.com/php/func_array_rand.asp

$arr = [
  'chleb' => 'skiny/1.jpg',
  'mienso' => 'skiny/2.jpg',
  'mienso2' => 'skiny/2.jpg',
  'mienso3' => 'skiny/2.jpg',
  'mienso4' => 'skiny/2.jpg',
  'mienso5' => 'skiny/2.jpg',
  'Hasasdasd' => 'skiny/2.jpg',
];

$randomEntry = array_rand($arr, 1);

score 0 · Answer 4 · answered Jan 29 '18 at 12:21

use this without the loop

$key = array_rand($arr);
echo $arr[$key];

full example

$arr = [
   'chleb' => 'skiny/1.jpg',
   'mienso' => 'skiny/2.jpg',
   'mienso2' => 'skiny/3.jpg',
   'mienso3' => 'skiny/4.jpg',
   'mienso4' => 'skiny/5.jpg',
   'mienso5' => 'skiny/6.jpg',
   'Hasasdasd' => 'skiny/7.jpg',
 ];

$key = array_rand($arr);
echo $key;
echo $arr[$key];

score 0 · Answer 5 · edited Jan 29 '18 at 12:25

0

Are the '.jpg' files meant to all be the same except for one? Because randomly choosing between 7 files when 6 are the same is going to return the same file more than often.

$rand_keys = array_rand($arr);
echo $arr[$rand_keys];

edited Jan 29 '18 at 12:25

Andreas

23,610
6
30
62

answered Jan 29 '18 at 12:22

Cambray

134
3
14

score 0 · Answer 6 · answered Jan 29 '18 at 12:22

0

You should print array result like below,

$rand_keys = array_rand($arr, 1);
echo $arr[$rand_keys[0]] . "\n";

answered Jan 29 '18 at 12:22

KMS

566
4
16

score 0 · Answer 7 · answered Jan 29 '18 at 12:33

0

<?php
    $input = array(
    'chleb' => 'skiny/1.jpg',
    'mienso' => 'skiny/2.jpg',
    'mienso2' => 'skiny/3.jpg',
    'mienso3' => 'skiny/4.jpg',
    'mienso4' => 'skiny/5.jpg',
    'mienso5' => 'skiny/6.jpg',
    'Hasasdasd' => 'skiny/7.jpg',
);

foreach($input as $key => $value) {
    $keys = array_rand( $input, 1);
    echo $input[$keys];
}
?>

answered Jan 29 '18 at 12:33

Alpha_Bords

425
1
4
11

or change $input to $arr – Alpha_Bords Jan 29 '18 at 12:34

php associative array select 1 random value with key

7 Answers7