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My code:

$input = array("1", "2", "3", "4", "5", "6", "8", "15", "22");
$value1=$input[array_rand($input)];

I want to randomize given numbers and get just one numbers of them back to "$input", but I got an error : "PHP Warning: array_rand() expects parameter 1 to be array, boolean given in...

Line where this error is triggered is here:

$value1=$input[array_rand($input)];

How to fix that error ?

?

Thanks!

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14
  • 2
    ..because $inputis of type boolean, not an array. RTM Commented May 28, 2016 at 23:58
  • since we don't know what $input is, or where it comes from, we can't really help. Fact is, $input is not an array. Commented May 28, 2016 at 23:59
  • @Jeff Oh, that's great, thanks very much for that information, so what to do to not read this error on my server over and over again ? Commented May 28, 2016 at 23:59
  • Are you serious? Did you even read the error message? It could not be any clearer. Commented May 29, 2016 at 0:00
  • @Sverri M. Olsen I am sorry, but I have no idea what to do to fix that. Commented May 29, 2016 at 0:01

3 Answers 3

Reset to default
2

This should work:

$input = ["1", "2", "3", "4", "5", "6", "8", "15", "22"];

$randomInputIndex = rand(0, count($input)); // Returns any integer between 0 and 8 in your case
$randomInputValue = $input[$randomInputIndex];
// $input[0] returns 1
// $input[1] returns 2
// $input[7] returns 15
// $input[8] returns 22

Or simply use:

$input = ["1", "2", "3", "4", "5", "6", "8", "15", "22"];

$randomInputValue = array_rand($input);

Read more about PHP's arrays here.

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6 Comments

I am think that something is like that, because if I remember correctly same types of "boolean" error I am getting when I edited my code from "mysql" to "mysqli"... I am sure that will work! Many thanks JasonK !
I need $input to be just 1 given RANDOM number from those : "1", "2", "3", "4", "5", "6", "8", "15", "22"
Both examples should do exactly that... have you tried them out already?
that second version will work for me I guess, There is not needed to count, but important is just to give me back randomly one number from those numbers given: "1", "2", "3", "4", "5", "6", "8", "15", "22" etc. Thank you so much mr. JasonK!
No problem, please accept the answer if it solved your problem. Good luck.
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1

Just the way you need it!

$input = array("preto", "vermelho", "laranja", "roxo", "abacate", "pera", "uva");


$random = array_rand($input, 1);
print_r($input[$random]);

Result random unique:

laranja

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Comments

0 
$value1= $input->random(number);

ps: number = number of element you want to get ,

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