I have a multidimensional php array that represents a table like this
-------------
| A | 0 | A |
|---|---|---|
| 0 | 0 | 0 |
|---|---|---|
| A | 0 | A |
-------------
so the array looks like this:
array (size=3)
0 =>
array (size=3)
0 => string 'A' (length=1)
1 => string '0' (length=1)
2 => string 'A' (length=1)
1 =>
array (size=3)
0 => string '0' (length=1)
1 => string '0' (length=1)
2 => string '0' (length=1)
2 =>
array (size=3)
0 => string 'A' (length=1)
1 => string '0' (length=1)
2 => string 'A' (length=1)
Now i want to delete the second row and the second column (this is just a simplified example btw).
Deleting the row is easy:
array_splice($array, 1, 1);
I found this approach but was wondering if there was a simpler way (similar to the row) of deleting the column as well? Maybe transposing the array first?
Try this:
function delete_row(&$array, $offset) {
return array_splice($array, $offset, 1);
}
function delete_col(&$array, $offset) {
return array_walk($array, function (&$v) use ($offset) {
array_splice($v, $offset, 1);
});
}
Tested on Ideone: http://ideone.com/G5zRi0
Edit (Amade):
delete_col function can also be slightly modified to work with arrays with missing columns:
function delete_col(&$array, $key) {
return array_walk($array, function (&$v) use ($key) {
unset($v[$key]);
});
}
This can be used e.g. when you need to iterate over an array and remove some columns in each step. A function using array_splice instead of unset would not be appropriate in such scenarios (it's offset-based and not key-based).