How to remove all numbers from string?
PhpRegexPhp Problem Overview
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...).
Php Solutions
Solution 1 - Php
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.
Solution 2 - Php
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
.
Solution 3 - Php
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.
Solution 4 - Php
Use Predefined Character Ranges
echo $words= preg_replace('/[[:digit:]]/','', $words);
Solution 5 - Php
Regex
$words = preg_replace('#[0-9 ]*#', '', $words);
Solution 6 - Php
Alternatively, you can do this:
$words = trim($words, " 1..9");