remove numbers and special characters from a string using php and regex

Question

I have some problems with removing numbers and special characters. I want to remove all numbers and special characters from the input. Here's my code :

$input = $_POST["input"];

function preprocessing($input){
    $input = trim(strtolower($input));
    $remove = '/[^a-zA-Z0-9]/s';
    $result = preg_split($remove, $input, -1, PREG_SPLIT_NO_EMPTY);
    for($i = 0; $i < count($resultl); $i++){
        $result[$i] = trim($result[$i]);
    }
    return $result;
}

String example : qwd qwd qwdqd123 13#$%^&*) ADDA ''''

Output : Array ( [0] => qwd [1] => qwd [2] => qwdqd123 [3] => 13 [4] => adda )

The numbers still appear on my string. How to solve this ? Thank you before.

You may want to remove `0-9` from your pattern. i.e. `/[^a-zA-Z]/` if it is truly only upper- and lower-case alphabets you need — kennasoft, Aug 26 '16 at 17:06

Labradorcode · Answer 1 · 2016-08-26T17:00:08.607

2

Check this

function clean($string) {
   $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.

   return preg_replace('/[^A-Za-z\-]/', '', $string); // Removes special chars.
}

edited Aug 26 '16 at 17:00

answered Aug 26 '16 at 16:54

Labradorcode

371
1
12

Please don't plagiarize. http://stackoverflow.com/a/14114419/1570534 – Hanky Panky Aug 26 '16 at 17:11
@HankyPanky why u marked my question as duplicate ? – brown26 Aug 27 '16 at 00:25

remove numbers and special characters from a string using php and regex

1 Answers1