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 php.net/manual/en/function.array-rand.php — KMS
– KMS, Commented Jan 29, 2018 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
– Dave, Commented Jan 29, 2018 at 12:26
Possible duplicate of Selecting a random element from a PHP associative array — splash58
– splash58, Commented Jan 29, 2018 at 14:08

Andreas · Accepted Answer · 2018-01-29 13:12:24Z

2

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, 2018 at 13:12

answered Jan 29, 2018 at 12:21

Andreas

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3 Comments

Season6 Over a year ago

I need to have got value and key not only .jpg file.

Andreas Over a year ago

@Season6 See edit. Is that what you are looking for?

Season6 Over a year ago

Yes ! Thanks very much :D

Kuba Zabielski · Accepted Answer · 2018-01-29 12:18:43Z

0

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

answered Jan 29, 2018 at 12:18

Kuba Zabielski

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4 Comments

Season6 Over a year ago

Notice: Array to string conversion in E:\xampp\htdocs\csgolos\freeCase.php on line 65

Kuba Zabielski Over a year ago

$a = array_rand($arr,1); echo $a[0];

Season6 Over a year ago

Then this only echo the first letter of the key if we have got chleb then the echo gives - c

Kuba Zabielski Over a year ago

$a = array_rand($arr,1); echo $a. It's working for me

Darren · Accepted Answer · 2018-01-29 12:21:32Z

0

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);

answered Jan 29, 2018 at 12:21

Darren

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Comments

Ali Faris · Accepted Answer · 2018-01-29 12:21:51Z

0

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];

answered Jan 29, 2018 at 12:21

Ali Faris

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Comments

KMS · Accepted Answer · 2018-01-29 12:22:20Z

0

You should print array result like below,

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

answered Jan 29, 2018 at 12:22

KMS

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Comments

Andreas · Accepted Answer · 2018-01-29 12:25:48Z

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, 2018 at 12:25

Andreas

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answered Jan 29, 2018 at 12:22

Cambray

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terreus · Accepted Answer · 2018-01-29 12:33:28Z

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, 2018 at 12:33

terreus

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1 Comment

terreus Over a year ago

or change $input to $arr

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