Help with a rand() function

[Seaholme]

Hey,

 

This is my [faulty] PHP

 

$input3 = array("BB, BB, BB, BB, BB, BB, BB, BB, BB, bb");
$rand_keys3 = array_rand($input3, 2);
$BB1 = $input3[$rand_keys3[0]] . "\n";
$BB2 = $input3[$rand_keys3[1]] . "\n";

$input4 = array("HD, HD, HD, HD, HD, hd");
$rand_keys4 = array_rand($input4, 2);
$HD1 = $input4[$rand_keys4[0]] . "\n";
$HD2 = $input4[$rand_keys4[1]] . "\n";

$input5 = array("DD, DD, DD, DD, DD, DD, DD, dd");
$rand_keys5 = array_rand($input5, 2);
$D1 = $input5[$rand_keys5[0]] . "\n";
$D2 = $input5[$rand_keys5[1]] . "\n";

$input6 = array("CC, CC, CC, CC, CC, cc");
$rand_keys6 = array_rand($input6, 2);
$C1 = $input6[$rand_keys6[0]] . "\n";
$C2 = $input6[$rand_keys6[1]] . "\n";

$input7 = array("HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, HG, hg");
$rand_keys7 = array_rand($input7, 2);
$HG1 = $input7[$rand_keys7[0]] . "\n";
$HG2 = $input7[$rand_keys7[1]] . "\n";

 

And this is the error I'm getting:

 

Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/content/91/6351791/html/dogtrader.php on line 48

 

Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/content/91/6351791/html/dogtrader.php on line 54

 

Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/content/91/6351791/html/dogtrader.php on line 60

 

Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/content/91/6351791/html/dogtrader.php on line 66

 

Warning: array_rand() [function.array-rand]: Second argument has to be between 1 and the number of elements in the array in /home/content/91/6351791/html/dogtrader.php on line 72

 

I've checked back over it all and looked up the function in various places to check what they say about it, but can't see which bit I'm going wrong wit! :[

 

If anybody has any advice as to what to do to fix it, it would be much appreciated.

 

 

Cheers.

[bh]

Hi,

 

your array has only one element:

 

$input3 = array("BB, BB, BB, BB, BB, BB, BB, BB, BB, bb");

->

$input3 = array("BB", "BB", "BB", ..., "bb");

 

[Seaholme]

I'm afraid I'm not really knowledgeable enough to know what you mean by that.

 

Do you mean that I should change it from for instance:

$input4 = array("HD, HD, HD, HD, HD, hd");
$rand_keys4 = array_rand($input4, 2);
$HD1 = $input4[$rand_keys4[0]] . "\n";
$HD2 = $input4[$rand_keys4[1]] . "\n";

 

to

$input4 = array("HD, HD, HD, HD, HD, hd");
$rand_keys4 = array_rand($input4);
$HD1 = $input4[$rand_keys4[0]] . "\n";
$HD2 = $input4[$rand_keys4[1]] . "\n";

 

??

 

I don't quite follow the significance of the "...."!

 

Thanks so much.

 

[bh]

Dont you see the difference the two lines? Look it again.

 

it is one array element, cuz its a string

"BB, BB, BB"

 

this line is two array elements

"BB", "BB"

 

array("BB, BB, BB"); -> one element

array("BB", "BB", "BB"); -> three elements

 

Here

array_rand($input4, 2);

$input4 is an array which has one element and you want to choose randomly two...

[JasonLewis]

You're not creating your arrays correctly, if you do print_r on your $input4 you'll get an output of:

 

Array (
    [0] => HD, HD, HD, HD, HD, hd
)

 

As you can see, you only have 1 element in your array, this is because you haven't separated them by commas correctly.

 

However, if you change it too:

 

$input4 = array("HD", "HD", "HD", "HD", "HD", "hd");

It will output as:

 

Array (
    [0] => HD
    [1] => HD
    [2] => HD
    [3] => HD
    [4] => HD
    [5] => hd
)

 

Can you see the difference?

 

(I'll post this anyway. )

[bh]

[off]

we did everything, let him away

[/off]

 

sorry for the off

[Seaholme]

Oooh, gotcha! Clearly wasn't looking carefully enough there! Awesome, thank you both so much for the very clear explanations, sorry for being a bit slow! 

 

 

[JasonLewis]

Oooh, gotcha! Clearly wasn't looking carefully enough there! Awesome, thank you both so much for the very clear explanations, sorry for being a bit slow! 

Don't worry about, you're learning. I remember when I was afraid of arrays.

[bh]

Yeah, just up with the head.