Array sorting

[sol01]

Ok so I have an array like this:

$aaa = array(john, john, john, jack, jack, john, jane, john, john, jane, jack);

Anyone want to help me out? I need to figure out how to list the names in the array by order of the amount of instances.

like:

john (6 instances)
jack (3 instances)
jane (2 instances)

Thanks for the help.

[mikefn]

1. make an array of count and string.
   $ct[a] and $st[a]
2. get the max number of array
   $max = count($aaa);
3. compare $aaa[1] from $aaa[2] to $aaa[$max], if there's equal, then $st[1] = $aaa[1] and $ct[1]+= 1;
   then you compare $aaa[2] from $aaa[1] to $aaa[max] and skip $aaa[2], if there's equal, then $st[2] = $aaa[2] and $ct[2] += 2;
   after that you list all the loop to print out the instances.
   hope this helps ... 🙂

Mike

[Anon]

...or simply use the array_count_values() function which does all of that for you.

goto http://www.php.net/manual/en/function.array-count-values.php

[phpjuggler]

Hi Sol,

try this little piece of code:
<?php
//the array to sort
$aaa = array(john, john, john, jack, jack, john, jane, john, john, jane, jack);
//the values to print
$found = array();

function get_element_count($array_b,$val)
{
	$counter = 1;
	$lastval = "";
	global $found;

	foreach($array_b as $key => $value)
	{

		if($value  == $val)
		{

			$counter++;

			unset($array_b[$key]);
			//reset($array);
			//continue;	

		}


	}

		$found[$counter-1]= $val;

	   reset($array_b);

	   $temp = array();
	   $counter =0;
	   foreach($array_b as $key => $value)
	   {
	   		$temp[$counter++] = $value;

	   }

		if(count($temp) >=1)
		   get_element_count($temp,$temp[0]);


}

//start the function
get_element_count($aaa,$aaa[0]);	

//print out the sorted array
		krsort($found);
		foreach($found as $key => $value)
		{
			echo $value." was found ".$key." times\n";	
		}

?>

[sol01]

I was also wondering how to sort an array.

Say I have:

$aaa = array(john, john, john, jack, jack, john, jane, john, john, jane, jack);

how can I sort it to look like:

$aaa = array(john, john, john, john, john, john, jack, jack, jack, jane, jane, jack);

Thanks all!!