sqlite.inc

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<?php
class Sqlite {
 
    public static function isPresent() {
        return extension_loaded( 'pdo_sqlite' );
    }
 
    public static function checkSqlSyntax( $files ) {
        if ( !Sqlite::isPresent() ) {
            throw new MWException( "Can't check SQL syntax: SQLite not found" );
        }
        if ( !is_array( $files ) ) {
            $files = array( $files );
        }
 
        $allowedTypes = array_flip( array(
            'integer',
            'real',
            'text',
            'blob', // NULL type is omitted intentionally
        ) );
 
        $db = new DatabaseSqliteStandalone( ':memory:' );
        try {
            foreach ( $files as $file ) {
                $err = $db->sourceFile( $file );
                if ( $err != true ) {
                    return $err;
                }
            }
 
            $tables = $db->query( "SELECT name FROM sqlite_master WHERE type='table'", __METHOD__ );
            foreach ( $tables as $table ) {
                if ( strpos( $table->name, 'sqlite_' ) === 0 ) {
                    continue;
                }
 
                $columns = $db->query( "PRAGMA table_info({$table->name})", __METHOD__ );
                foreach ( $columns as $col ) {
                    if ( !isset( $allowedTypes[strtolower( $col->type )] ) ) {
                        $db->close();
                        return "Table {$table->name} has column {$col->name} with non-native type '{$col->type}'";
                    }
                }
            }
        } catch ( DBError $e ) {
            return $e->getMessage();
        }
        $db->close();
        return true;
    }
};