Re: Problem

At 02:44 PM 10/12/00 , Fredrik Arild Takle wrote:

Hi. I'm writing some info to a .txt file and I don't want people to submitting the letter a. Can I prevent people from writing this letter? Best Regards Fredrik A. Takle ftakle@online.no --> NOTE: I'm currently not member of this list, can you answer me directly to the email adress above? <--

If you want to display an error message, use something like

        if (strstr($TextString, 'a')) {
                echo "You have an 'a' in your string; please dispose of it!";
        } else {
                ...
                # write your text file
                ...
        }

See

        http://www.php.net/manual/function.strstr.php

If you want a case INsensitive comparison, use stristr() function. If you have an older version of PHP3, you can use

        if (ereg('a', $TextString)) {

or the case insensitive version

        if (eregi('a', $TextString)) {

in place of the

        if (strstr($TextString, 'a')) {

line above. If you simply want to remove all instances of 'a', use

        $TextString = str_replace('a', '', $TextString);

or

        $TextString = ereg_replace('a', '', $TextString);

For more info, see

        http://www.php.net/manual/function.str-replace.php

-steve +------------------------------------------------------------------------+

| Steve Edberg                           University of California, Davis |
| sbedberg@ucdavis.edu                                     (530)754-9127 |
| http://aesric.ucdavis.edu/                  http://pgfsun.ucdavis.edu/ |

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