Php Calculator Changing Ereg To Preg_Match?

Nerock · December 1, 2012

Hey guys, I recently posted here and I am now trying to fix the ereg because I was told it was deprecated I read some of the stuff in the php manual however I don't understand most of it since I am extremely new to programming. Here's my code, which works fine when i use the ereg function but when i use preg_match() it doesnt work it gives always give me the output "please restrict your input to numbers." However it works just fine when I use !ereg. If i enter numbers it gives me an answer and I enter letters it gives me the "please restrict your input to numbers." message. Here's the code.

<HTML>
<HEAD>
<TITLE> Grade calculator </TITLE>
</HEAD>
<center><h1 style="Font-family:Vijaya;font-size:34;Color:#556B2F;"> Grade Calculator </h1></center>
<BODY bgcolor="#9BCD9B">


<?php
$submit = $_POST["submit"];
$Lab1 = $_POST["Lab1"];
$Lab2 = $_POST["Lab2"];
$Lab3 = $_POST["Lab3"];
$LA1 = $_POST["LA1"];
$LA2 = $_POST["LA2"];
$LA3 = $_POST["LA3"];
$LA4 = $_POST["LA4"];
$Quiz1 = $_POST["Quiz1"];
$Quiz2 = $_POST["Quiz2"];
$Quiz3 = $_POST["Quiz3"];
$Quiz4 = $_POST["Quiz4"];
$Final = $_POST["Final"];

if ($submit)   
{


    if (($Lab1 == "") || ($Lab2 =="") || ($Lab3 =="") || ($LA1 =="") || ($LA2 =="") || ($LA3 =="") || ($LA4 =="") || ($Quiz1 =="") || ($Quiz2 =="") || ($Quiz3 =="") || ($Quiz4 =="") || ($Final ==""))
     {
     echo("<font face=\"Tahoma\" size=\"2\" color=\"#FF0000\"><b>You Left an area blank, please try again.</b></font><br>");
     }


    elseif ( ( !preg_match("[0-9]",$Lab1) ) || ( !preg_match("[0-9]",$Lab2) ) || ( !preg_match("[0-9]",$Lab3)) || ( !preg_match("[0-9]",$LA1))|| ( !preg_match("[0-9]",$LA2))|| ( !preg_match("[0-9]",$LA3)) || ( !preg_match("[0-9]",$LA4))||( !preg_match("[0-9]",$Quiz1))|| ( !preg_match("[0-9]",$Quiz2)) || ( !preg_match("[0-9]",$Quiz3))||( !preg_match("[0-9]",$Quiz4)||( !preg_match("[0-9]",$Final))))
     {
     echo("<font face=\"Tahoma\" size=\"2\" color=\"#FF0000\"><b>Please restrict your input to numbers.</b></font><br>");
     }

else
     {   
     $LabTotal=($Lab1 + $Lab2 + $Lab3)*(.08);
     $LAtotal=($LA1+$LA2+$LA3+$LA4)*(.06);
     $Quiztotal=($Quiz1+$Quiz2+$Quiz3+$Quiz4)*(.2);
     $Finalscore=($Final)*(.36);
     $FinalGrade=($Finalscore+$Quiztotal+$LAtotal+$LabTotal);




if ($FinalGrade> 93 and $FinalGrade <=1000)
 {
  print("your grade is: " . $FinalGrade . "% " . "A");
 }
 elseif ($FinalGrade>88 and $FinalGrade<=93)
 {
  print("your grade is: " . $FinalGrade . "% " . "A-");
 }
 elseif ($FinalGrade>84 and $FinalGrade<=88)
 {
  print("your grade is: " . $FinalGrade . "% " . "B+");
 }
 elseif ($FinalGrade>79 and $FinalGrade<=84)
 {
  print("your grade is: " . $FinalGrade . "% " . "B");
 }
 elseif ($FinalGrade>76 and $FinalGrade<=79)
 {
  print("your grade is: " . $FinalGrade . "% " . "B-");
 }
 elseif ($FinalGrade>72 and $FinalGrade <=76)
 {
  print("your grade is: " . $FinalGrade . "% " . "C+");
 }
 elseif ($FinalGrade>69 and $FinalGrade <=72)
 {
  print("your grade is: " . $FinalGrade . "% " . "C");
 }
 elseif ($FinalGrade>63 and $FinalGrade <=69)
 {
  print("your grade is: " . $FinalGrade . "% " . "C-");
 }
 elseif ($FinalGrade>59 and $FinalGrade <=63)
 {
  print("your grade is: " . $FinalGrade . "% " . "D+");
 }
 elseif ($FinalGrade>54 and $FinalGrade<=59)
 {
  print("your grade is: " . $FinalGrade . "% " . "D");
 }
 elseif ($FinalGrade>50 and $FinalGrade<=53)
 {
  print("your grade is: " . $FinalGrade . "% " . "D-");
 }
 elseif ($FinalGrade<49)
 {
  print("your grade is: " . $FinalGrade . "% " . "F");
 }
  }
}
?>
<FORM METHOD="post" ACTION="test.php">
<P><font face="Tahoma" size="2"><b>Enter your Lab Scores: <br><INPUT TYPE="text" NAME="Lab1" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><b><INPUT TYPE="text" NAME="Lab2" SIZE=3></b></font></p>

<font face="Tahoma" size="2"><b><INPUT TYPE="text" NAME="Lab3" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><b>Enter your Lecture Assignment Scores: <br><INPUT TYPE="text" NAME="LA1" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="LA2" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="LA3" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="LA4" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><b>Enter your Quiz Scores: <br><INPUT TYPE="text" NAME="Quiz1" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="Quiz2" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="Quiz3" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><INPUT TYPE="text" NAME="Quiz4" SIZE=3></b></font></p>
<font face="Tahoma" size="2"><b>Enter your Final Score: <br><INPUT TYPE="text" NAME="Final" SIZE=3></b></font></p>
</b></font>
<P><INPUT TYPE="submit" NAME="submit" VALUE="Evaluate Grade"></p>
</FORM>
</BODY>
</HTML>
</HTML>
</html>

Christian F. · December 1, 2012

You're missing the delimiters around the ReExps. In short, add a "/" after the opening quote and before the closing quote. Which should make the RegExp look like this:

"/[0-9]/"

For more information, I can highly recommend Regular-Expressions.info. It contains all the information you'll ever need on Regular Expression.

PS: You can use \d instead of the [0-9] group, means the same.

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Php Calculator Changing Ereg To Preg_Match?

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