generating all possible random letters

[canabatz]

hi'

 

how can i  randomize the letters a,b,c,d,e all possible ways, and i want to print the result

and unique from each?

 

thanx

[trq]

echo implode(" ", (shuffle(range('a','z'))));

 

edit: missing )

[gerkintrigg]

Without testing it, i dunno, but try:

$array('a','b','c','d','e');
$count=count($array);
$i=1;
while($i<=$count){
   $item=rand($array);
   echo $item;
   $array=(array()-$item)
   $i++;
}

 

I'm not sure how you'd get that to work... possibly use explode on the array as a string or set the array using $1='a'; etc, then remove them.

 

you could do if statements to say

if($item='a'){$array=X

Possibly a switch statement might work better.

 

I thought I'd post this anyway, but Thorpe's post's much better.

[trq]

Sorry, forgot shuffle doesn't actually return an array.

 

$arr = range('a','z');
shuffle($arr);
echo implode(" ", $arr);

[Deoctor]

do u want to randomly display the letters from a-z or else

do u want something like all possible combination s of the letters a-z

[canabatz]

this is working :

<? 
$arr = array('a','b','c','d','e');
shuffle($arr);
echo implode(" ", $arr);
?>

 

how do i display all possible combinations?

 

thanx!!!

[Deoctor]

this is working :

<? 
$arr = array('a','b','c','d','e');
shuffle($arr);
echo implode(" ", $arr);
?>

 

 

 

 

how do i display all possible combinations?

 

thanx!!!

 

for this as thrope has always mentioned it out..

u can use that

but u need to loop it out for the calculating the number of possible permutations..

 

i have modified his code to generate the 1000 combination s

<?php

for ($i=1;$i<=1000;$i++)
{
$arr = range('a','z');
shuffle($arr);
echo implode(" ", $arr);echo "<br>";
}
?>

[trq]

this is working :

<? 
$arr = array('a','b','c','d','e');
shuffle($arr);
echo implode(" ", $arr);
?>

 

 

 

 

how do i display all possible combinations?

 

thanx!!!

 

for this as thrope has always mentioned it out..

u can use that

but u need to loop it out for the calculating the number of possible permutations..

 

i have modified his code to generate the 1000 combination s

<?php

for ($i=1;$i<=1000;$i++)
{
$arr = range('a','z');
shuffle($arr);
echo implode(" ", $arr);echo "<br>";
}
?>

 

That will just create 1000x26 random letters, not all combinations of letters.

 

To the OP, do you really want all combinations? That'll take some work and will likely be pretty tough on your server.

[Deoctor]

@thrope

i know that it will give only 1000 combinations, i just gave it as an example..

he need to use the permutations to calculate the number of possible methods..

[canabatz]

i think i just need to know to possible combinations possible with a,b,c,d,e ,and put it in the for loop

and if it will be unique ,then it will be the target

 

[Deoctor]

i think this would resolve it out..

<?php
function pc_permute($items, $perms = array( )) {
    if (empty($items)) { 
        print join(' ', $perms) . "\n";
    }  else {
        for ($i = count($items) - 1; $i >= 0; --$i) {
             $newitems = $items;
             $newperms = $perms;
             list($foo) = array_splice($newitems, $i, 1);echo "<br>";
             array_unshift($newperms, $foo);
             pc_permute($newitems, $newperms);
         }
    }
}

pc_permute(split('  ', 'a b c d e f g h i j k l m n o p q r s t u v w x y z'));

?>

 

but one thing try it in ur localhost..

 

[canabatz]

sorry ym

 

but i get only this as result:

 

a b c d e f g h i j k l m n o p q r s t u v w x y z

 

thnx

[trq]

Theres a small typo. Call the function with either....

 

pc_permute(split(' ', 'a b c d e f g h i j k l m n o p q r s t u v w x y z'));

 

or

pc_permute(range('a','z'));

[Deoctor]

Funny  but wht went wrong is that in this line

pc_permute(split('  ', 'a b c d e f g h i j k l m n o p q r s t u v w x y z'));

 

give only one blank space in the

' '

 

like this

pc_permute(split(' ', 'a b c d e f g h i j k l m n o p q r s t u v w x y z'));

 

if there are dual blank space it will stop after abc--z output..

[Deoctor]

this function will take the first two letters a b and shuffle them in possible fashion and then a b c like this it will continue...

[canabatz]

thanx guys for your help!!

[printf]

If you want the combination to be unique, I would do something like this...

 

 

<?php

function combinations ( $a )
{
$b = array ();
$c = sizeof ( $a );
$d = pow ( 2, $c );

for ( $e = 0; $e <= $d; $e++ )
{
	$f = '';
	$g = 1;
	$h = 1;

	for ( $i = 1; $i < $c; $i++ )
	{
		$g = $g * 2;
		$h = $h + $g;
	}

	$j = $e;

	for ( $k = $g; $k >= 1; $k = $k / 2 )
	{
		$l = ( $j / $k ) >= 1 ? 1 : 0;

		if ( $l == 1 )
		{
			$j = $j - $k;
		}

		$f .= $l;
	}

	$m = '';

	for ( $n = 0; $n <= $c; $n++ )
	{
		$m .= $f{$n} == '1' ? $a[$n] : '';
	}

	$b[] = $m;
}

return array_slice ($b, 1, - 1 );
}

$array = array ( 'a', 'b', 'c' );

$all = combinations ( $array );

print_r ( $all );

?>

 

Which returns... these unique combination

 

Array
(
    [0] => c
    [1] => b
    [2] => bc
    [3] => a
    [4] => ac
    [5] => ab
    [6] => abc
)

[Deoctor]

If you want the combination to be unique, I would do something like this...

 

 

<?php

function combinations ( $a )
{
   $b = array ();
   $c = sizeof ( $a );
   $d = pow ( 2, $c );

   for ( $e = 0; $e <= $d; $e++ )
   {
      $f = '';
      $g = 1;
      $h = 1;

      for ( $i = 1; $i < $c; $i++ )
      {
         $g = $g * 2;
         $h = $h + $g;
      }

      $j = $e;

      for ( $k = $g; $k >= 1; $k = $k / 2 )
      {
         $l = ( $j / $k ) >= 1 ? 1 : 0;

         if ( $l == 1 )
         {
            $j = $j - $k;
         }

         $f .= $l;
      }

      $m = '';

      for ( $n = 0; $n <= $c; $n++ )
      {
         $m .= $f{$n} == '1' ? $a[$n] : '';
      }

      $b[] = $m;
   }

   return array_slice ($b, 1, - 1 );
}

$array = array ( 'a', 'b', 'c' );

$all = combinations ( $array );

print_r ( $all );

?>

 

Which returns... these unique combination

 

Array
(
    [0] => c
    [1] => b
    [2] => bc
    [3] => a
    [4] => ac
    [5] => ab
    [6] => abc
)

 

of course the function which i gave will also give the unique values...