Re: String valid?

ARGH! DO NOT USE THAT UNDER ANY CIRCUMSTANCES! Even forgetting the unneccesary overhead caused by using files for this, it would be possible for one user's file to be written at the same time as another's, causing problems. I would use preg_match('|^[0-9]+$|',$string) instead. Daniel R. Anderson wrote:

You could try something like this: function is_string_a_number($string) { $fff = fopen('temp','w'); // I'm sorry but I like I/O .. :-P fwrite($fff,$string); fclose($fff); $fff = fopen('temp','r'); while ($fff and (!(feof($fff)))) { $a_char = fgetc($fff); if (!(($a_char == '1') or ($a_char == '2') or ($a_char == '3') or

         ($a_char == '4') or ($a_char == '5') or ($a_char == '6') or
         ($a_char == '7') or ($a_char == '8') or ($a_char == '9') or
         ($a_char == '0') or ($a_char == '.')))

{

     return FALSE;

} }; return TRUE; } I'm a relative noob to PHP, and would love it if anybody can offer any tips or advice as to why this code is good or bad. :-) -Dan Anderson

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