filling an array with array_pad

Question

I am currently working on a site where I have an array that must contain 8 values.

I generate a random number and write it into my array, after that i would liek to check if this number was infact 8 character long. If this was not the case it should be filled with leading zero's.

Here is the code i am using

$number=rand(0,255);

// convert the number to binary and store it as an array
$states=str_split(decbin($number),1);
echo '<pre>'.print_r($states,true).'</pre>';

// in case the number is not 8 bit long make it an 8 bit number using array_pad

if(count($states)<8){
   $states = array_pad($states,count($states)-8,"0");
}

The problem is now that it never fills up the array even if the array only consists of 3 or 4 entrys.

Thanks for the help.

Edit :Thanks to everyone for awnsering so quickly the solution provided by Suresh Kamrushi is working.

Suresh Kamrushi · Accepted Answer · 2013-11-29 15:06:58Z

1

instead of

 $states = array_pad($states,count($states)-8,"0");

Try like this:

$number=rand(0,255);

// convert the number to binary and store it as an array
$states=str_split(decbin($number),1);
echo '<pre>'.print_r($states,true).'</pre>';

// in case the number is not 8 bit long make it an 8 bit number using array_pad

if(count($states)<8){
   $states = array_pad($states,8,"0");
}
print_r($states);

PHP fiddle: http://phpfiddle.org/main/code/a1d-m97

answered Nov 29, 2013 at 15:06

Suresh Kamrushi

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billyonecan · Accepted Answer · 2013-11-29 15:07:30Z

1

If I understand correctly you don't need count($states) - 8:

$states = array_pad($states, -8, "0");

Which will pad the array to a size of 8, with leading zeroes

answered Nov 29, 2013 at 15:07

billyonecan

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Community · Accepted Answer · 2023-11-17 20:33:26Z

1

For array_pad the second argument is the size you want the array to be, not the number of items you want to add to it.

So just do:

if(count($states)<8){
   $states = array_pad($states,8,"0");
}

Or, as array_pad has no effect if your array is already big enough, you don't even need the if(count($states)<8) part.

edited Nov 17, 2023 at 20:33

CommunityBot

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answered Nov 29, 2013 at 15:08

Clart Tent

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