CODEWITHSUNDEEP
phpregex
Gago Design
Gago Design

Reputation: 992

How to remove all numbers from string?

I'd like to remove all numbers from a string [0-9]. I wrote this code that is working:

$words = preg_replace('/0/', '', $words ); // remove numbers
$words = preg_replace('/1/', '', $words ); // remove numbers
$words = preg_replace('/2/', '', $words ); // remove numbers
$words = preg_replace('/3/', '', $words ); // remove numbers
$words = preg_replace('/4/', '', $words ); // remove numbers
$words = preg_replace('/5/', '', $words ); // remove numbers
$words = preg_replace('/6/', '', $words ); // remove numbers
$words = preg_replace('/7/', '', $words ); // remove numbers
$words = preg_replace('/8/', '', $words ); // remove numbers
$words = preg_replace('/9/', '', $words ); // remove numbers

I'd like to find a more elegant solution: 1 line code (IMO write nice code is important).

The other code I found in stackoverflow also remove the Diacritics (á,ñ,ž...).

Upvotes: 72

Views: 147509

Answers (6)

Naveen DA
Naveen DA

Reputation: 4380

Use Predefined Character Ranges also known as Character Classes:

echo $words= preg_replace('/[[:digit:]]/','', $words);

Upvotes: 7

Bohdan Pukhovskyi
Bohdan Pukhovskyi

Reputation: 23

Alternatively, you can do this:

$words = trim($words, " 1..9");

Upvotes: -1

dan-lee
dan-lee

Reputation: 14492

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.

Upvotes: 185

Dimpal Gohil
Dimpal Gohil

Reputation: 219

Regex

   $words = preg_replace('#[0-9 ]*#', '', $words);

Upvotes: -2

Veger
Veger

Reputation: 37905

Use some regex like [0-9] or \d:

$words = preg_replace('/\d+/', '', $words );

You might want to read the preg_replace() documentation as this is directly shown there.

Upvotes: 6

hsz
hsz

Reputation: 152216

Try with regex \d:

$words = preg_replace('/\d/', '', $words );

\d is an equivalent for [0-9] which is an equivalent for numbers range from 0 to 9.

Upvotes: 59

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