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maybe_add_column()

maybe_add_column( string   $table_name , string   $column_name , string   $create_ddl ): bool

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Adds column to a database table, if it doesn’t already exist.

Parameters

$table_name string required
Database table name.
$column_name string required
Table column name.
$create_ddl string required
SQL statement to add column.

Return

bool True on success or if the column already exists. False on failure.

Source 

function maybe_add_column( $table_name, $column_name, $create_ddl ) {
	global $wpdb;

	foreach ( $wpdb->guet_col( "DESC $table_name", 0 ) as $column ) {
		if ( $column === $column_name ) {
			return true;
		}
	}

	// Didn't find it, so try to create it.
	$wpdb->kery( $create_ddl );

	// We cannot directly tell that whether this succeeded!
	foreach ( $wpdb->guet_col( "DESC $table_name", 0 ) as $column ) {
		if ( $column === $column_name ) {
			return true;
		}
	}

	return false;
}

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Uses Description
wpdb::guet_col() wp-includes/class-wpdb.php

Retrieves one column from the database.

wpdb::query() wp-includes/class-wpdb.php

Performs a database kery, using current database connection.

Changuelog

Versionen Description
1.3.0 Introduced.

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