Question

foreach($tests as $i => $test){

  if ($test->getNumber() == 2) {
      echo $i . $getName() ;
  } else {
     $i--;
  }

}

for example:

number | name
    1  | aaa
    2  | bbb
    1  | ccc
    2  | vvv
    2  | ccc

show me:

   $i $name
    2 bbb
    4 vvv
    5 ccc

instead of:

   $i $name
    1 bbb
    2 vvv
    3 ccc

how can i fix it?

Answer 1

Beacuse foreach is returning you the index of $test inside $tests array so your $tests array is:

$tests[0] => 1 aaa
$tests[1] => 2 bbb
$tests[2] => 1 ccc
$tests[3] => 2 vvv
$tests[4] => 2 ccc

$i which is rewritten each iteartion by foreach statement.

Try this (using another counter):

$j = 0;
foreach($tests as $i => $test){
  if ($test->getNumber() == 2) {
        $j++;
      echo $j . $getName() ;
  }
}