Unset an array element inside a foreach loop [duplicate]

Question

I'm accessing an array by reference inside a foreach loop, but the unset() function doesn't seem to be working:

foreach ( $this->result['list'] as &$row ) {
    if ($this_row_is_boring) {
        unset($row);
    }
}

print_r($this->result['list']); // Includes rows I thought I unset

Ideas? Thanks!

Answer 1

You're unsetting the reference (breaking the reference). You'd need to unset based on a key:

foreach ($this->result['list'] as $key => &$row) {
    if ($this_row_is_boring) {
        unset($this->result['list'][$key]);
    }
}

Answer 2

foreach ($this->result['list'] as $key => &$row) {
    if ($this_row_is_boring) {
        unset($this->result['list'][$key]);
    }
}
unset($row);

Remember: if you are using a foreach with a reference, you should use unset to dereference so that foreach doesn't copy the next one on top of it. More info