What are the most 3 repeated numbers in a string

[npsari]

Hello there

 

I have a string like that...

 

$string = "224 556 665 224 667 443 776 443 222 443 667 224 997 665 009 443 443";

 

I want to use a PHP script to echo the most 3 repeated numbers in this string

 

So, the result should be...

 

443 224 665

 

Do you know how can i do that in PHP

 

 

[Mchl]

explode

array_count_values

[Brian W]

Well, I don't know if Mchl's answer works for you, but I wanted to see if I could get the Mode (that what it is called in math) three times. Here it is

<?php
$string = array(224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443);
function M_MODE($array){
ksort($array);
$Sets = array();
foreach($array as $number){
	if(in_array($number, $array)){
		$Sets[$number]++;
	}
	}
arsort($Sets);
echo key($Sets)." ";
next($Sets);
echo key($Sets)." ";
next($Sets);
echo key($Sets)." ";
}
M_MODE($string);
?>

It probably sucks but it works and I'm proud of it. lol

[npsari]

Hey, thank you for the answers

 

Thank you much Brian

 

You code is working fine here too

[Mchl]

Well... I'd go with something along these lines

 

$string = "224 556 665 224 667 443 776 443 222 443 667 224 997 665 009 443 443";

$stringArray = explode(" ",$string); //convert string to array

$countValues = array_count_values($stringArray);  //count values in array

arsort($countValues);  //sort in descending order maintaining key=>value association

$result = array_slice($countValues,0,3,TRUE); //get three first elements from $countValues

print_r($result);

 

 

[Brian W]

Damn, all of what I did is nullified by one pre-existing function. Meh, live and learn.

 

[npsari]

Thank you both

 

though, there is somethign weird here

 

I changed a tiny bit in the first line

 

<?php
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
$string = array($numbers);
function M_MODE($array){
ksort($array);
$Sets = array();
foreach($array as $number){
	if(in_array($number, $array)){
		$Sets[$number]++;
	}
	}
arsort($Sets);
echo key($Sets)." ";
next($Sets);
echo key($Sets)." ";
next($Sets);
echo key($Sets)." ";
}
M_MODE($string);
?>

 

It doesnt work anymore, whyyy

[kenrbnsn]

The problem is that this

<?php
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
$string = array($numbers);
?>

is not the same as

<?php
$string = array(224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443);
?>

The first code creates an array with one entry that is the string. The second one creates an array of all the numbers.

 

Ken

[npsari]

Thank you Ken

 

Can you offer me a soultion, because i have the string $numbers (which contains all the numbers)

 

Can you tell me how can i create the array from it

[kenrbnsn]

Use explode:

<?php
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
$string = explode(',',$numbers);
?>

 

Ken

[npsari]

Thank you Ken

 

Is it possible that you tell me how to do this, because i can't succeed

 

I am trying to get the results as strings

 

arsort($Sets);
echo key($Sets)." ";
next($Sets);
$get1 = key($Sets)." ";
next($Sets);
$get2 = key($Sets)." ";

 

Because i want to use $get1 & $get2 & $get3 later on

 

What i done above doesn't work

[kenrbnsn]

The problem is that $get1, $get2 & $get3 are set in the function, so they are local to the function. To use them outside, you have to return the values at the end of the function.

 

<?php
function mode($set) {
   $cv = array_count_values($set);
   arsort($cv);
   $result = array_slice($cv,0,3,TRUE);
   print_r(array_keys($result));
   return(array_keys($result));
}
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
list($get1,$get2,$get3) = mode(explode(',',$numbers));
echo $get1 . "<br>";
echo $get2 . "<br>";
echo $get3 . "<br>";
?>

 

Ken

[npsari]

Is this a new way of doing it, because i am using the method provided by Brian

 

Anyway, I uploaded your script in an empty php page, i got the following error...

 

Warning: Wrong parameter count for array_slice() in /home/zortins/public_html/try.php on line 5

 

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/zortins/public_html/try.php on line 6

 

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/zortins/public_html/try.php on line 7

 

Is it possibe to show me how can i do it in Brian's script (Because i already added to it parts of mine)

 

Can you tell me how can i have $get1 $get2 $get3 outside that function

 

 

What i have now is this:

 

$get_string = "224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";

$string = explode(',',$get_string );

function M_MODE($array){
ksort($array);
$Sets = array();
foreach($array as $number){
	if(in_array($number, $array)){
		$Sets[$number]++;
	}
	}
arsort($Sets);
echo key($Sets)." ";
next($Sets);
$get1 = key($Sets);
next($Sets);
$get2 = key($Sets);
next($Sets);
$get3 = key($Sets);

}
M_MODE($string);

print "$get1 - $get2 - $get3";

[kenrbnsn]

What version of php are your running? My script works perfectly with PHP 5.2.5

 

With the other routine:

<?php
function M_MODE($array){
ksort($array);
$Sets = array();
foreach($array as $number){
	if(in_array($number, $array)){
		$Sets[$number]++;
	}
}
arsort($Sets);
        $result = array_slice($Sets,0,3,TRUE);
        return(array_keys($result));
}
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
list($get1,$get2,$get3) = M_MODE(explode(',',$numbers));
echo $get1 . "<br>";
echo $get2 . "<br>";
echo $get3 . "<br>";
?>

 

Ken

[npsari]

To tell you the truth, I dont know about php versions, all i know is PHP!

 

I am a Mechanical Engineer, programming is a hobby to me

 

Thanks for helping me by the way

 

So anyway, i uploaded this new script you just given me in an empty page

 

I got that error...

 

Warning: Wrong parameter count for array_slice() in /home/zortins/public_html/try.php on line 11

 

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/zortins/public_html/try.php on line 12

 

So, you took Brian's script and shaped it differently, is that what you have done here

[kenrbnsn]

Remove the ",TRUE" from the array_slice arguments. It sounds like your version of PHP is earlier that 5.0.2.

 

Ken

 

 

 

 

[npsari]

Yes, i removed it just now, it worked ok with no errors

However, the results were...

 

0

1

2

 

Any idea why this happened

[kenrbnsn]

change the routine to:

<?php
function M_MODE($array){
        ksort($array);
        $Sets = array();
        foreach($array as $number){
                if(in_array($number, $array)){
                        $Sets[$number]++;
                }
        }
        arsort($Sets);
        $result = array_slice(array_keys($Sets),0,3);
        return($result);
}
$numbers="224,556,665,224,667,443,776,443,222,443,667,224,997,665,009,443,443";
list($get1,$get2,$get3) = M_MODE(explode(',',$numbers));
echo $get1 . "<br>";
echo $get2 . "<br>";
echo $get3 . "<br>";
?>

 

Ken