PHP array and string - php

Question

I have an array containing dates (year) and position.
I need to build a string out of it, where:
Every position is separated by a / if it's in a different year ; and a - must appear if there was no result on a year. And if we have a -, then there is no need to use the / to separate the years ...
I'm struggling to build a logic and code for it.
Example:
array(7) {
[0]=> array(2) {
["year"]=> string(4) "2015"
["hformpos"]=> string(1) "2" }
[1]=> array(2) {
["year"]=> string(4) "2015"
["hformpos"]=> string(1) "4" }
[2]=> array(2) {
["year"]=> string(4) "2015"
["hformpos"]=> string(1) "5" }
[3]=> array(2) {
["year"]=> string(4) "2015"
["hformpos"]=> string(1) "5" }
[4]=> array(2) {
["year"]=> string(4) "2015"
["hformpos"]=> int(0) }
[5]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "2" }
[6]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "3" } }
Should show: 32/05542
And
array(7) {
[0]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "2" }
[1]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "4" }
[2]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "5" }
[3]=> array(2) {
["year"]=> string(4) "2014"
["hformpos"]=> string(1) "5" }
[4]=> array(2) {
["year"]=> string(4) "2013"
["hformpos"]=> int(0) }
[5]=> array(2) {
["year"]=> string(4) "2011"
["hformpos"]=> string(1) "2" }
[6]=> array(2) {
["year"]=> string(4) "2011"
["hformpos"]=> string(1) "3" } }
32-5542-
Thank you!

Answer 1

I am assuming that the array is sorted in the descending order of the dates(year).
$year_flag = $arrays[0]["year"];
$result = "";
foreach( $arrays as $array )
{
if($year_flag == $array["year"]){
if( $array["hformpos"] !==0){
$result.= $array["hformpos"];
}else {
$result.= "-";
}
}elseif( $array["hformpos"] ===0){
$result.= "-";
}else{
$result.= "/";
if( $array["hformpos"] !==0){
$result.= $array["hformpos"];
}else {
$result.= "-";
}
}
$year_flag = $array["year"];
}