Count values with the same value inside loop - php

Question

I try count elements inside loop, with the same value, as i put in my title, now i show my little script fot try to do this :
<?php
$values="1,2,3~4,5,2~7,2,9";
$expt=explode("~",$values);
foreach ($expt as $expts)
{
$expunit=explode(",",$expts);
$bb="no";
foreach($expunit as $expunits)
{
//// $expunit[1] it´s the second value in each explode
if ($expunits==="".$expunit[1]."")
{
$bb="yes";
}
if ($bb=="yes")
{
print "$expunits --- $expunit[1] ok, value it´s the same<br>";
}
else
{
print " $expunits bad, value it´s not the same<br>";
}
}
}
?>
THE SCRIPT MUST SHOW DATA IN THIS WAY :
$values="1,2,3~4,5,2~7,2,9";
**FIRST ELEMENTS WITH THE SAME SECOND ELEMENT, IN VALUES COMMON VALUE IT´S NUMBER 2, BECAUSE IT´S IN SECOND POSITION **
FIRST :
1,2,3
7,2,9
LAST THE OTHERS
4,5,2
I try verificate the second position, between delimeters, because it´s value i want verificate for count inside loop, while explode string, actually give bad values, i think it´s bad because don´t get real or right values, i don´t know if it´s possible do it or with other script or change something in this
Thank´s Regards

Answer 1

EDIT - this is a bit closer to what you are looking for (sorry it is not perfect as I do not have time to work on it fully):
$values="1,2,3~4,5,2~7,2,9";
$values=explode("~",$values);
foreach($values as $key => $expt) {
$expit=explode(",",$expt);
$search_value = $expit[1];
$matched=array();
foreach($values as $key2 => $expt2) {
if($key !== $key2) {
$expit2=explode(",",$expt2);
if($expit[1]==$expit2[1]) {
$matched[] = $expit[1];
}
}
}
}
array_unique($matched);
foreach($matched as $match) {
$counter = 0;
$no_matches = array();
echo "<br />Matching on digit ".$match;
foreach($values as $key3 => $expt3) {
$expit3=explode(",",$expt3);
if($match == $expit3[1]) {
echo "<br />".$expt3;
$counter++;
} else {
$no_matches[] = $expt3;
}
}
echo "<br />Total number of matches - ".$counter;
echo "<br />Not matching on digit ".$match;
foreach($no_matches as $no_match) {
echo "<br />".$no_match;
}
}
Outputs:
Matching on digit 2
1,2,3
7,2,9
Total number of matches - 2
Not matching on digit 2
4,5,2