How to remove all numbers from string?

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For Western Arabic numbers (0-9):

$words = preg_replace('/[0-9]+/', '', $words);

For all numerals including Western Arabic (e.g. Indian):

$words="१३३७";
$words = preg_replace('/\d+/u', '', $words);
var_dump($words); // string(0) ""
  • \d+ matches multiple numerals.
  • The modifier /u enables unicode string treatment. This modifier is important, otherwise the numerals would not match.

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