maybe_drop_column( string $table_name, string $column_name, string $drop_ddl )
Drop column from database table, if it exists.
Parameters
- $table_name
-
(string) (Required) Table name
- $column_name
-
(string) (Required) Column name
- $drop_ddl
-
(string) (Required) SQL statement to drop column.
Return
(bool) False on failure, true on success or doesn't exist.
Source
File: wp-admin/install-helper.php
function maybe_drop_column($table_name, $column_name, $drop_ddl) {
global $wpdb;
foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
if ($column == $column_name) {
// Found it, so try to drop it.
$wpdb->query($drop_ddl);
// We cannot directly tell that whether this succeeded!
foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
if ($column == $column_name) {
return false;
}
}
}
}
// Else didn't find it.
return true;
}
Changelog
| Version | Description |
|---|---|
| WP-1.0.0 | Introduced. |