Same name and namespace in other branches
  1. 4.7.x includes/unicode.inc \drupal_strtolower()
  2. 5.x includes/unicode.inc \drupal_strtolower()
  3. 6.x 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

PHP wrapper functions
Functions that are wrappers or custom implementations of PHP functions.
50 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;
  }
}