function db_prefix_tables in Drupal 4

Same name and namespace in other branches

1. 5 includes/database.inc \db_prefix_tables()
2. 6 includes/database.inc \db_prefix_tables()

Append a database prefix to all tables in a query.

Queries sent to Drupal should wrap all table names in curly brackets. This function searches for this syntax and adds Drupal's table prefix to all tables, allowing Drupal to coexist with other systems in the same database if necessary.

Parameters

$sql: A string containing a partial or entire SQL query.

Return value

The properly-prefixed string.

Related topics

11 calls to db_prefix_tables()

db_next_id in includes/database.mysqli.inc

Return a new unique ID in the given sequence.

db_next_id in includes/database.mysql.inc

Return a new unique ID in the given sequence.

db_next_id in includes/database.pgsql.inc

Return a new unique ID in the given sequence.

db_query in includes/database.inc

Runs a basic query in the active database.

db_queryd in includes/database.inc

Debugging version of db_query().

... See full list

File

includes/database.inc, line 58

Wrapper for database interface code.

Code

function db_prefix_tables($sql) {
  global $db_prefix;
  if (is_array($db_prefix)) {
    if (array_key_exists('default', $db_prefix)) {
      $tmp = $db_prefix;
      unset($tmp['default']);
      foreach ($tmp as $key => $val) {
        $sql = strtr($sql, array(
          '{' . $key . '}' => $val . $key,
        ));
      }
      return strtr($sql, array(
        '{' => $db_prefix['default'],
        '}' => '',
      ));
    }
    else {
      foreach ($db_prefix as $key => $val) {
        $sql = strtr($sql, array(
          '{' . $key . '}' => $val . $key,
        ));
      }
      return strtr($sql, array(
        '{' => '',
        '}' => '',
      ));
    }
  }
  else {
    return strtr($sql, array(
      '{' => $db_prefix,
      '}' => '',
    ));
  }
}