Hi All,
I was working on a project and needed to dynamically populate a
multi-dimensional array based on the size of an array. The script does
exactly what I want it to do, but I can't imagine that it's done in the
best way. I used an eval to construct the array based on the number of
values passed to the index array. When attempting to do the same with
Variable Variables, the addition of brackets caused the PHP Parser to
die.
Does anyone have any suggestions or alternatives to achieving the same
results?
Thanks,
Mike
Array:
$array = array(
array('name' => 'Person1', 'username' => 'username1',
'join_date' => 12233445566, 'state' => 'NJ'),
array('name' => 'Person2', 'username' => 'username2',
'join_date' => 12233445566, 'state' => 'NJ'),
array('name' => 'Person3', 'username' => 'username3',
'join_date' => 12233445996, 'state' => 'NY'),
array('name' => 'Person4', 'username' => 'username4',
'join_date' => 12233445996, 'state' => 'NJ'),
array('name' => 'Person5', 'username' => 'username5',
'join_date' => 12233445566, 'state' => 'NJ'),
array('name' => 'Person6', 'username' => 'username6',
'join_date' => 12233445566, 'state' => 'NY'),
array('name' => 'Person7', 'username' => 'username7',
'join_date' => 12233445776, 'state' => 'NY'),
array('name' => 'Person8', 'username' => 'username8',
'join_date' => 12233445566, 'state' => 'NY'),
array('name' => 'Person9', 'username' => 'username9',
'join_date' => 12233445996, 'state' => 'NJ'),
);
Function:
function createIndex($array, $index){
$index_array = array();
foreach($array as $result){
if(is_array($index)){
$key = '$index_array';
for($i=0;$i<=sizeof($index)-1;$i++){
$key .= "['{$result[$index[$i]]}']";
}
$key .= "[]";
eval("$key = \$result;");
}
else{
$index_array[$result[$index]] = $result;
}
}
return $index_array;
}
Calling Function:
print_r(create_index($array, array('state', 'join_date')));
Output:
Array
(
[NJ] => Array
(
[12233445566] => Array
(
[0] => Array
(
[name] => Person1
[username] => username1
[join_date] => 12233445566
[state] => NJ
)
[1] => Array
(
[name] => Person2
[username] => username2
[join_date] => 12233445566
[state] => NJ
)
[2] => Array
(
[name] => Person5
[username] => username5
[join_date] => 12233445566
[state] => NJ
)
)
[12233445996] => Array
(
[0] => Array
(
[name] => Person4
[username] => username4
[join_date] => 12233445996
[state] => NJ
)
[1] => Array
(
[name] => Person9
[username] => username9
[join_date] => 12233445996
[state] => NJ
)
)
)
[NY] => Array
(
[12233445996] => Array
(
[0] => Array
(
[name] => Person3
[username] => username3
[join_date] => 12233445996
[state] => NY
)
)
[12233445566] => Array
(
[0] => Array
(
[name] => Person6
[username] => username6
[join_date] => 12233445566
[state] => NY
)
[1] => Array
(
[name] => Person8
[username] => username8
[join_date] => 12233445566
[state] => NY
)
)
[12233445776] => Array
(
[0] => Array
(
[name] => Person7
[username] => username7
[join_date] => 12233445776
[state] => NY
)
)
)
)
