PHP-MySQL form with 1 field input validation -


in php got simple form 1 field has validated , string stripped both sides. string keep characters , want match if stripped string in mysql db. if exists in db input string db table, if not discard it.

the problem enter validated if statement true , inserted database. has insert when if statement true, not everytime. got working without string stripping when strip string crap cant working again...

this code string strip , validates true

    ...     $txt=substr($_post[zz_id],12,-1);      $test = mysql_query("select zzcode zzcodes zzcode='$txt'");     $row = mysql_fetch_array($test);      if ($row['zzcode']== $txt)              $sql="insert data     values     ('$_post[zz_id]','$_post[id]', timestamp(8))";     else             echo "zz code error";             echo "<br />";             echo $txt;      if (!mysql_query($sql,$con))      {       die('error: ' . mysql_error());               }     mysql_close($con)     ...

here block of code without string strip works:

    ...     $test = mysql_query("select zzcode zzcodes zzcode='$_post[zz_id]'");     $row = mysql_fetch_array($test);      if ($row['zzcode']== $_post[zz_id])     $sql="insert data     values     ('$_post[zz_id]','$_post[id]', timestamp(8))";     else             echo "zz koodi ei saa sisestada";             echo "<br />";      if (!mysql_query($sql,$con))      {       die('error: ' . mysql_error());               }     mysql_close($con)     ...

if want compare strings suggest use string comparison function such strcmp. know more strcmp visit strcmp - php manual.

this function return 0 if 2 strings equal. comparison case sensitive.


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