Home php regex Remove special characters from php string

Remove special characters from php string

,
Hello friends. At some point we need to filter our strings and remove some unwanted characters from the string for some purpose. It is quite easy to do this with regular expressions.

Php built-in function preg_replace() can be used to remove special characters from a string. It takes 3 parameters and its syntax is

$output = preg_replace(pattern, replacWith, string);

Remove all characters except alphabets and digits use this.


   $output = preg_replace('/[^a-zA-Z0-9]/s', '', $string);

Remove all ascii characters from the string use this.


   $output=preg_replace('/[^(\x20-\x7f)]*/s','',$string);
Remove special characters from php string Remove special characters from php string Reviewed by JS Pixels on April 28, 2011 Rating: 5

13 comments:

  1. AnonymousMarch 24, 2012 at 12:48 AM

    Great code....is there anyway to apply this, /[^a-zA-Z0-9]/s and keep spaces between the text? Otherwise "Today is a great day!!@@#$%#@@#!!!" becomes "Todayisagreatday"

    ReplyDelete
  2. JS PixelsMarch 24, 2012 at 10:24 AM

    You only have to give a space in your expression like
    /[^a-zA-Z0-9 ]/s
    and it will keep the space between text.
    Now "Today is a great day!!@@#$%#@@#!!!" becomes "Today is a great day"

    Thanks

    ReplyDelete
  3. AnonymousNovember 22, 2012 at 6:53 PM

    Nice code..

    ReplyDelete
  4. vigneshDecember 26, 2012 at 11:35 AM

    Thnx man! Is there a way to replace the spaces between the strings to underscores?

    ReplyDelete
  5. JS PixelsDecember 26, 2012 at 12:36 PM

    Try this
    preg_replace("/\s/","_",html_entity_decode($s));

    IF you want to remove all adjacent spaces with another character visit

    This Post

    ReplyDelete
  6. sampatMarch 1, 2013 at 4:11 PM

    it is working only for some specials chracters

    ReplyDelete
  7. ourseotoolApril 4, 2013 at 5:50 PM

    my preg_replace code is
    $new_data = str_replace ("'", "", $data);
    $new_data = preg_replace ('/[^\p{L}\p{N}]/u', ' ', $new_data);

    its working fine but i want to change little bit in this code i want replace all special character with white space (space) but don't change ()brackets symbol
    how it is possible please help me

    ReplyDelete
  8. JS PixelsApril 5, 2013 at 2:00 AM

    @ourseotool
    Try this

    $new_data = preg_replace('/[^a-z0-9\(\)]/si', ' ', $new_data);

    It will replace all special characters with whitespace except ( ) brackets.

    ReplyDelete
  9. AnonymousJuly 10, 2015 at 11:32 AM

    not got any idea

    ReplyDelete
  10. UnknownOctober 23, 2015 at 2:18 PM



    output is "my name-------is--------yashwant"
    but i want this "my name-is-yashwant"
    is it possible

    ReplyDelete
    Replies
    1. JS PixelsOctober 23, 2015 at 2:40 PM

      @Yashwant Singh Gehlot

      Yes this is possible, try this

      preg_replace ('/-+/', '-', $str);

      Delete
  11. UnknownApril 7, 2016 at 3:25 PM

    $str=SELECT P.*,C.name FROM `products` P left OUTER join categories C ON C.id = P.category_id WHERE P.subcategory_id =51 and P.status= 1 AND ( P.file_type=\'JPEG\' )ORDER BY id DESC limit 0,60


    now i want to remove (backslash) \ from this string

    anyone can help me ?

    ReplyDelete
    Replies
    1. AnonymousApril 7, 2016 at 5:06 PM

      Just use $str = str_replace("\", "", $str);

      Delete

Subscribe to: Post Comments ( Atom )
Altaf Web. Powered by Blogger.