Count duplicate adjacent (Array)

[BeHappy]

Hello;

I would like to do the following operation;

Count duplicate (adjacent)

my code

 

        <?php  
      
$Array = array("test", "test", "hello", "test", "world", "world", "world", "hello", "test");


 for( $i= 0 ;  $i <= 6 ;$i++ ) {
$j=1;
 if ($Array[$i] === $Array[$i+1]) {
 
 $j+=$j; 

echo  $j;
}
?>

and showing something like 2,1,1,3,1,1

Thanks

[gw1500se]

Use array_count_values to determine which keys occur how many times. If you want an array of just the counts you can build an array from that with just the values.

[BeHappy]

2 minutes ago, gw1500se said:

Use array_count_values to determine which keys occur how many times. If you want an array of just the counts you can build an array from that with just the values.

Hi, thanks

can you give me an example with code please 😇

[gw1500se]

The link to the manual has examples.

[BeHappy]

34 minutes ago, gw1500se said:

The link to the manual has examples.

There is no solution for adjacent duplicate in the link !!!

[Barand]

if array == array[i-1]

then you have adjacent duplicates

[BeHappy]

15 minutes ago, Barand said:

if array == array[i-1]

then you have adjacent duplicates

Thank you Barand;

This my array

$Array = array("test", "test", "hello", "test", "world", "world", "world", "hello", "test");

Well, i would like to show a list with adjacent duplicates for example the word  test 2 not 4 duplicates

and finally the output will be like this 2,1,1,3,1,1 

the problem that array_count_values show the all duplicates, i would like to show the adjacent duplicates

Edited November 21, 2020 by BeHappy

[Barand]

You've had some clues. What have you tried?

[BeHappy]

11 minutes ago, Barand said:

You've had some clues. What have you tried?

I have created this code but i think there's a problem with it

<?php   
$array = array("test", "test", "hello", "test", "world", "world", "world", "hello", "test");
             
$j=1;
for( $i= 0 ;  $i <= 7 ;$i++ ){ 
                 if ($array[$i] === $array[$i+1])
                 
	{ 
echo $j .= $j+1;
	}
	
	else
	{
      echo "1";
    }
       
}?>

output = 1211112131213121411

not 2,1,1,3,1,1  😅

Edited November 21, 2020 by BeHappy

[Barand]

try

$arr = array("test", "test", "hello", "test", "world", "world", "world", "hello", "test");

$prev = '';
$results = [];
$j = 0;
foreach ($arr as $i => $v) {
    if ($v != $prev) {
        $j = $i;
        $results[$j] = 1;
        $prev = $v;
    }
    else {
        $results[$j]++;
    }
}

foreach ($results as $k => $v) {
    echo "$arr[$k] : $v <br>";
}

Result:

test : 2 
hello : 1 
test : 1 
world : 3 
hello : 1 
test : 1 

 

[BeHappy]

Barand 😍🥰

Thank you so much, you are a genius 💗💞