function drupal_strtolower in Drupal 7

Same name and namespace in other branches

1. 4 includes/unicode.inc \drupal_strtolower()
2. 5 includes/unicode.inc \drupal_strtolower()
3. 6 includes/unicode.inc \drupal_strtolower()

Lowercase a UTF-8 string.

Parameters

$text: The string to run the operation on.

Return value

string The string in lowercase.

Related topics

49 calls to drupal_strtolower()

block_block_list_alter in modules/block/block.module

Implements hook_block_list_alter().

book_export in modules/book/book.pages.inc

Menu callback; Generates representations of a book page and its children.

DatabaseSchema_pgsql::processField in includes/database/pgsql/schema.inc

Set database-engine specific properties for a field.

DrupalHtmlToTextTestCase::assertHtmlToText in modules/simpletest/tests/mail.test

Helper function for testing drupal_html_to_text().

drupal_html_class in includes/common.inc

Prepares a string for use as a valid class name.

... See full list

File

includes/unicode.inc, line 526

Provides Unicode-related conversions and operations.

Code

function drupal_strtolower($text) {
  global $multibyte;
  if ($multibyte == UNICODE_MULTIBYTE) {
    return mb_strtolower($text);
  }
  else {

    // Use C-locale for ASCII-only lowercase
    $text = strtolower($text);

    // Case flip Latin-1 accented letters
    $text = preg_replace_callback('/\\xC3[\\x80-\\x96\\x98-\\x9E]/', '_unicode_caseflip', $text);
    return $text;
  }
}