_db_query_callback

• Drupal 4.7
• Drupal 5
• Drupal 6

Versions

4.7 – 6

_db_query_callback($match, $init = FALSE)

Helper function for db_query().

Related topics

Database abstraction layer

Allow the use of different database servers using the same code base.

Code

includes/database.inc, line 141

<?php
function _db_query_callback($match, $init = FALSE) {
  static $args = NULL;
  if ($init) {
    $args = $match;
    return;
  }

  switch ($match[1]) {
    case '%d': // We must use type casting to int to convert FALSE/NULL/(TRUE?)
      return (int) array_shift($args); // We don't need db_escape_string as numbers are db-safe
    case '%s':
      return db_escape_string(array_shift($args));
    case '%%':
      return '%';
    case '%f':
      return (float) array_shift($args);
    case '%b': // binary data
      return db_encode_blob(array_shift($args));
  }
}
?>

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