Insert data with insert_batch - mysql

Question

I'm using the following statement to insert data in mysql with codeigniter.
$this->db->insert_batch($table, $query);
$query is generated dynamically can have different number of columns on each array element
and maybe the number of elements may differ on condition
array (
0 => array(
'column1'=>'insert1',
'column2'=>'insert2'
),
1 => array(
'column1'=>'insert1';
'column2'=>'insert2',
'column4'=>'insert4'
)
)
could this cause an error or handles codigniter from deafult?
I'm building up the query as it follows
foreach ($sql_xml as $children) {
$children = $this->xml2array($children);
foreach ($children as $index => $child) {
if ($child != 'feed_id') {
$keys[$index] = $child;
}
}
}
switch (strtolower($this->config[0]->affiliate)) {
case 'case1':
$target_xml = $target_xml->productItems;
break;
case 'case2':
$target_xml = $target_xml;
break;
default :
break;
}
$query = array();
$data = array();
foreach ($target_xml as $feeds) {
$feeds = $this->xml2array($feeds);
$columns = new RecursiveIteratorIterator(new RecursiveArrayIterator($feeds));
foreach ($columns as $index => $column) {
if (array_key_exists($index, $keys)) {
if($column != ''){
$data[$keys[$index]] = $column;
$data['feed_id'] = $this->id;
}
//*TODO //$data['affiliate'] = "'.$this->config[0]->affiliate.'";
}
}
$query[] = $data;
}
if (count($query > 0)) {
foreach ($query as $t){
$this->db->insert($table, $t);
}
}

Answer 1

The array's would need to have the same amount of "columns".
So what I would recommend is the following (setting certain columns to null if no there is no data):
array (
0 => array(
'column1' => 'insert1',
'column2' => 'insert2',
'column3' => null,
'column4' => null
),
1 => array(
'column1' => 'insert1',
'column2' => 'insert2',
'column3' => 'insert3',
'column4' => 'insert4'
)
)
Also, your syntax is invalid and it would cause an error since you are using a ; instead of an , on the first column insert.