multi dimension array split with explode PHP - php

Question

i have multidimension array
$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";
then i explode $a
$array_a = explode("|", $a);
//loop
for($i=0;$i<=count($arr_a)-1;$i++){
arr_b = explode(",", $arr_a[$i]);
foreach($arr_b as $id => $access){
echo $id." have access ".$access;
}
}
//result
0 have access 5
1 have access add
0 have access 4
1 have access edit
0 have access 6
1 have access add
0 have access 6
1 have access edit
0 have access 19
1 have access add
0 have access 19
1 have access delete
0 have access 19
1 have access view
//-end result
the problem is :
how i can make the result like this
5 have access add
4 have access edit
6 have access add,edit
19 have access add,delete,view

Answer 1

I think Regex would be a better solution in this case, in case you haven't considered using it.
Sample (Tested):
$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";
$result = array();
// match each pair in the input
if (preg_match_all('/(\\d+)\\,(.*?)(\\||$)/m', $a, $matches)){
foreach( $matches[1] as $match_index => $match ){
$result[$match][] = $matches[2][$match_index];
}
}
// loop through the results and print in desired format
foreach( $result as $entry_index => $entry ){
echo "$entry_index have access " . implode( ',', $entry ) . "\n";
}
output:
5 have access add
4 have access edit
6 have access add,edit
19 have access add,delete,view
Using regex simplifies the code and also makes it somewhat easier to change the format of the input that is supported.
The $result array ended up with a hash map using your numeric ids as the keys and arrays of permissions (add, delete, etc) as the value for each key.

Answer 2

Try this one (tested):
// intial data
$strAccess = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";
// build access array
$arrayAccess = array();
$tmpList = explode('|', $strAccess);
foreach($tmpList as $access)
{
list($idUser, $right) = explode(',', $access);
if (!isset($arrayAccess[$idUser]))
$arrayAccess[$idUser] = array();
$arrayAccess[$idUser][] = $right;
}
// print it out
foreach($arrayAccess as $idUser => $accessList)
echo $idUser." has access ".implode(",", $accessList)."\n";

Answer 3

You can use counter something like
$count5=0;
foreach($arr_b as $id => $access){
if($access=='5'){
$count5++;
}
echo $id." have access ".$count5;
}

Answer 4

$a = "5,add|4,edit|6,add|6,edit|19,add|19,delete|19,view";
$array_a = explode("|". $a);
//loop
$aRights = array();
for($i=0;$i<=count($arr_a)-1;$i++){ $arr_b = explode(",", $arr_a[$i]);
foreach($arr_b as $id => $access){
$aRights[$id][] = $access;
}
}
foreach( $aRights as $id=>$rightsList){
echo $id." have access ";
$i=1;
foreach($rightsList as $r){
echo $r;
if($i != count($rightsList)) echo ",";
$i++;
}
}

Answer 5

What about something like hashmapping:
$tobegenerated = array();
$a = explode(yourdelimiter,yourstring);
foreach ($a as $cur)
{
$b = explode(delimiter,$cur);
$tobegenerated[$cur[0]] = $cur[1];
}
//Print hashmap $tobegenerated
This should work, remember that in php arrays are also hash maps
Edit 1:
Arrays in PHP are hash maps. A hash map can be interpreted as an array where keys can be anything and value can be anything too. In this case, you would like to use a hash map because you need to bind values that are "outside" the range of the array (even if they are ints). So a hash map is exactly what you want, allowing to specify anything as a key.
How a hash map work is something that you can search on google or on wikipedia. How arrays work in php can be found here