wpdb::get_col( string|null $query = null, int $x )
Retrieves one column from the database.
Description
Executes a SQL query and returns the column from the SQL result.
If the SQL result contains more than one column, the column specified is returned.
If $query is null, the specified column from the previous SQL result is returned.
Parameters
- $query
-
(Optional) SQL query. Defaults to previous query.
Default value: null
- $x
-
(Optional) Column to return. Indexed from 0. Default 0.
Return
(array) Database query result. Array indexed from 0 by SQL result row number.
Source
File: wp-includes/class-wpdb.php
public function get_col( $query = null , $x = 0 ) {
if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
$this->check_current_query = false;
}
if ( $query ) {
$this->query( $query );
}
$new_array = array();
// Extract the column values
if ( $this->last_result ) {
for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) {
$new_array[ $i ] = $this->get_var( null, $x, $i );
}
}
return $new_array;
}
Changelog
| Version | Description |
|---|---|
| 0.71 | Introduced. |