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Summery Summery
Adds column to database table, if it doesn’t already exist.
Syntax Syntax
Parameters Parameters
- $table_name
-
(Required) Database table name.
- $column_name
-
(Required) Table column name.
- $create_ddl
-
(Required) SQL statement to add column.
Return Return
(bool) True on success or if the column already exists. False on failure.
Source Source
File: wp-admin/install-helper.php
function maybe_add_column( $table_name, $column_name, $create_ddl ) {
global $wpdb;
foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) {
if ( $column === $column_name ) {
return true;
}
}
// Didn't find it, so try to create it.
$wpdb->query( $create_ddl );
// We cannot directly tell that whether this succeeded!
foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) {
if ( $column === $column_name ) {
return true;
}
}
return false;
}
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Changelog Changelog
| Version | Description |
|---|---|
| 1.0.0 | Introduced. |