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How to change a n value for a value like X


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7















I have a webpage for homework. Students fill in the boxes, then click send to send the form.
My php thankyou file gets the answers and sends to my email. I download the emails and use Python to check each answer against the correct answer, line for line using readlines().



This morning I noticed, one student missed the first part, 1 to 5 'choose the right word from the table.' They should just enter a letter, A to E, in each textbox, G1 to G5. The email sent by php then contains 5 empty lines, n, where the answers should be.



Because students often press enter in strange places, I run a Python script to get rid of empty lines in the emails after downloading.



So I would like to get php to put say X if a textbox is empty, before it sends the email.



The first part of the thankyou.php looks like this:



//should mail the contact form
<?php
$studentnr = $_POST['sn'];
$q1 = $_POST['G1'];
$q2 = $_POST['G2'];
$q3 = $_POST['G3'];
$q4 = $_POST['G4'];
$q5 = $_POST['G5'];


What I would like to do in php is something along the lines of:



for i in range(1, 6):  
answer = $q + str(i)
if answer = '':
answer = 'X'


but that would be Python. What is the right way to do this in php?



I think this should be done after collecting all the $qs in the php script, but before making the body of the email:



$body = "

Studentnr = ".$studentnr."
".$q1."
".$q2."
".$q3."
".$q4."
".$q5."
";


Very grateful for any tips!



Edit: this is an actual thankyou.php with the loop to change '' for X, but all I get now in the email is: Studentnr = 1725010999, nothing else. How to tweak this? I just entered the student number and left all other boxes empty, so I was expecting a lot of Xs. I am not getting any errors in the error log of my php directory on the webpage host. Maybe a ; missing somewhere?



//should mail the contact form
<?php
$studentnr = $_POST['sn'];
$q1 = $_POST['G1'];
$q2 = $_POST['G2'];
$q3 = $_POST['G3'];
$q4 = $_POST['G4'];
$q5 = $_POST['G5'];
$q6 = $_POST['G6'];
$q7 = $_POST['G7'];
$q8 = $_POST['G8'];
$q9 = $_POST['G9'];
$q10 = $_POST['G10'];
$q11 = $_POST['G11'];
$q12 = $_POST['G12'];
$q13 = $_POST['G13'];
$q14 = $_POST['G14'];
$q15 = $_POST['G15'];
$q16 = $_POST['G16'];
$q17 = $_POST['G17'];
$q18 = $_POST['G18'];

for ($i=1; $i <= 18; $i++) {
if (${"q$i"} == '') ${"q$i"} = 'X';
}

$body = "

Studentnr = ".$studentnr."
".$q1."
".$q2."
".$q3."
".$q4."
".$q5."
".$q6."
".$q7."
".$q8."
".$q9."
".$q10."
".$q11."
".$q12."
".$q13."
".$q14."
".$q15."
".$q16."
".$q17."
".$q18."
";


$to1 = "myemail@foxmail.com";

$subject = $studentnr . "sWeek1";
$headers = "From: peter@mypage.comrn";
$headers .= 'Content-Type: text/plain; charset=utf-8';

mail($to1, $subject, $body, $headers);

header("Location: email_success.php");

?>


Any more tips please?










share|improve this question





























    7















    I have a webpage for homework. Students fill in the boxes, then click send to send the form.
    My php thankyou file gets the answers and sends to my email. I download the emails and use Python to check each answer against the correct answer, line for line using readlines().



    This morning I noticed, one student missed the first part, 1 to 5 'choose the right word from the table.' They should just enter a letter, A to E, in each textbox, G1 to G5. The email sent by php then contains 5 empty lines, n, where the answers should be.



    Because students often press enter in strange places, I run a Python script to get rid of empty lines in the emails after downloading.



    So I would like to get php to put say X if a textbox is empty, before it sends the email.



    The first part of the thankyou.php looks like this:



    //should mail the contact form
    <?php
    $studentnr = $_POST['sn'];
    $q1 = $_POST['G1'];
    $q2 = $_POST['G2'];
    $q3 = $_POST['G3'];
    $q4 = $_POST['G4'];
    $q5 = $_POST['G5'];


    What I would like to do in php is something along the lines of:



    for i in range(1, 6):  
    answer = $q + str(i)
    if answer = '':
    answer = 'X'


    but that would be Python. What is the right way to do this in php?



    I think this should be done after collecting all the $qs in the php script, but before making the body of the email:



    $body = "

    Studentnr = ".$studentnr."
    ".$q1."
    ".$q2."
    ".$q3."
    ".$q4."
    ".$q5."
    ";


    Very grateful for any tips!



    Edit: this is an actual thankyou.php with the loop to change '' for X, but all I get now in the email is: Studentnr = 1725010999, nothing else. How to tweak this? I just entered the student number and left all other boxes empty, so I was expecting a lot of Xs. I am not getting any errors in the error log of my php directory on the webpage host. Maybe a ; missing somewhere?



    //should mail the contact form
    <?php
    $studentnr = $_POST['sn'];
    $q1 = $_POST['G1'];
    $q2 = $_POST['G2'];
    $q3 = $_POST['G3'];
    $q4 = $_POST['G4'];
    $q5 = $_POST['G5'];
    $q6 = $_POST['G6'];
    $q7 = $_POST['G7'];
    $q8 = $_POST['G8'];
    $q9 = $_POST['G9'];
    $q10 = $_POST['G10'];
    $q11 = $_POST['G11'];
    $q12 = $_POST['G12'];
    $q13 = $_POST['G13'];
    $q14 = $_POST['G14'];
    $q15 = $_POST['G15'];
    $q16 = $_POST['G16'];
    $q17 = $_POST['G17'];
    $q18 = $_POST['G18'];

    for ($i=1; $i <= 18; $i++) {
    if (${"q$i"} == '') ${"q$i"} = 'X';
    }

    $body = "

    Studentnr = ".$studentnr."
    ".$q1."
    ".$q2."
    ".$q3."
    ".$q4."
    ".$q5."
    ".$q6."
    ".$q7."
    ".$q8."
    ".$q9."
    ".$q10."
    ".$q11."
    ".$q12."
    ".$q13."
    ".$q14."
    ".$q15."
    ".$q16."
    ".$q17."
    ".$q18."
    ";


    $to1 = "myemail@foxmail.com";

    $subject = $studentnr . "sWeek1";
    $headers = "From: peter@mypage.comrn";
    $headers .= 'Content-Type: text/plain; charset=utf-8';

    mail($to1, $subject, $body, $headers);

    header("Location: email_success.php");

    ?>


    Any more tips please?










    share|improve this question



























      7












      7








      7








      I have a webpage for homework. Students fill in the boxes, then click send to send the form.
      My php thankyou file gets the answers and sends to my email. I download the emails and use Python to check each answer against the correct answer, line for line using readlines().



      This morning I noticed, one student missed the first part, 1 to 5 'choose the right word from the table.' They should just enter a letter, A to E, in each textbox, G1 to G5. The email sent by php then contains 5 empty lines, n, where the answers should be.



      Because students often press enter in strange places, I run a Python script to get rid of empty lines in the emails after downloading.



      So I would like to get php to put say X if a textbox is empty, before it sends the email.



      The first part of the thankyou.php looks like this:



      //should mail the contact form
      <?php
      $studentnr = $_POST['sn'];
      $q1 = $_POST['G1'];
      $q2 = $_POST['G2'];
      $q3 = $_POST['G3'];
      $q4 = $_POST['G4'];
      $q5 = $_POST['G5'];


      What I would like to do in php is something along the lines of:



      for i in range(1, 6):  
      answer = $q + str(i)
      if answer = '':
      answer = 'X'


      but that would be Python. What is the right way to do this in php?



      I think this should be done after collecting all the $qs in the php script, but before making the body of the email:



      $body = "

      Studentnr = ".$studentnr."
      ".$q1."
      ".$q2."
      ".$q3."
      ".$q4."
      ".$q5."
      ";


      Very grateful for any tips!



      Edit: this is an actual thankyou.php with the loop to change '' for X, but all I get now in the email is: Studentnr = 1725010999, nothing else. How to tweak this? I just entered the student number and left all other boxes empty, so I was expecting a lot of Xs. I am not getting any errors in the error log of my php directory on the webpage host. Maybe a ; missing somewhere?



      //should mail the contact form
      <?php
      $studentnr = $_POST['sn'];
      $q1 = $_POST['G1'];
      $q2 = $_POST['G2'];
      $q3 = $_POST['G3'];
      $q4 = $_POST['G4'];
      $q5 = $_POST['G5'];
      $q6 = $_POST['G6'];
      $q7 = $_POST['G7'];
      $q8 = $_POST['G8'];
      $q9 = $_POST['G9'];
      $q10 = $_POST['G10'];
      $q11 = $_POST['G11'];
      $q12 = $_POST['G12'];
      $q13 = $_POST['G13'];
      $q14 = $_POST['G14'];
      $q15 = $_POST['G15'];
      $q16 = $_POST['G16'];
      $q17 = $_POST['G17'];
      $q18 = $_POST['G18'];

      for ($i=1; $i <= 18; $i++) {
      if (${"q$i"} == '') ${"q$i"} = 'X';
      }

      $body = "

      Studentnr = ".$studentnr."
      ".$q1."
      ".$q2."
      ".$q3."
      ".$q4."
      ".$q5."
      ".$q6."
      ".$q7."
      ".$q8."
      ".$q9."
      ".$q10."
      ".$q11."
      ".$q12."
      ".$q13."
      ".$q14."
      ".$q15."
      ".$q16."
      ".$q17."
      ".$q18."
      ";


      $to1 = "myemail@foxmail.com";

      $subject = $studentnr . "sWeek1";
      $headers = "From: peter@mypage.comrn";
      $headers .= 'Content-Type: text/plain; charset=utf-8';

      mail($to1, $subject, $body, $headers);

      header("Location: email_success.php");

      ?>


      Any more tips please?










      share|improve this question
















      I have a webpage for homework. Students fill in the boxes, then click send to send the form.
      My php thankyou file gets the answers and sends to my email. I download the emails and use Python to check each answer against the correct answer, line for line using readlines().



      This morning I noticed, one student missed the first part, 1 to 5 'choose the right word from the table.' They should just enter a letter, A to E, in each textbox, G1 to G5. The email sent by php then contains 5 empty lines, n, where the answers should be.



      Because students often press enter in strange places, I run a Python script to get rid of empty lines in the emails after downloading.



      So I would like to get php to put say X if a textbox is empty, before it sends the email.



      The first part of the thankyou.php looks like this:



      //should mail the contact form
      <?php
      $studentnr = $_POST['sn'];
      $q1 = $_POST['G1'];
      $q2 = $_POST['G2'];
      $q3 = $_POST['G3'];
      $q4 = $_POST['G4'];
      $q5 = $_POST['G5'];


      What I would like to do in php is something along the lines of:



      for i in range(1, 6):  
      answer = $q + str(i)
      if answer = '':
      answer = 'X'


      but that would be Python. What is the right way to do this in php?



      I think this should be done after collecting all the $qs in the php script, but before making the body of the email:



      $body = "

      Studentnr = ".$studentnr."
      ".$q1."
      ".$q2."
      ".$q3."
      ".$q4."
      ".$q5."
      ";


      Very grateful for any tips!



      Edit: this is an actual thankyou.php with the loop to change '' for X, but all I get now in the email is: Studentnr = 1725010999, nothing else. How to tweak this? I just entered the student number and left all other boxes empty, so I was expecting a lot of Xs. I am not getting any errors in the error log of my php directory on the webpage host. Maybe a ; missing somewhere?



      //should mail the contact form
      <?php
      $studentnr = $_POST['sn'];
      $q1 = $_POST['G1'];
      $q2 = $_POST['G2'];
      $q3 = $_POST['G3'];
      $q4 = $_POST['G4'];
      $q5 = $_POST['G5'];
      $q6 = $_POST['G6'];
      $q7 = $_POST['G7'];
      $q8 = $_POST['G8'];
      $q9 = $_POST['G9'];
      $q10 = $_POST['G10'];
      $q11 = $_POST['G11'];
      $q12 = $_POST['G12'];
      $q13 = $_POST['G13'];
      $q14 = $_POST['G14'];
      $q15 = $_POST['G15'];
      $q16 = $_POST['G16'];
      $q17 = $_POST['G17'];
      $q18 = $_POST['G18'];

      for ($i=1; $i <= 18; $i++) {
      if (${"q$i"} == '') ${"q$i"} = 'X';
      }

      $body = "

      Studentnr = ".$studentnr."
      ".$q1."
      ".$q2."
      ".$q3."
      ".$q4."
      ".$q5."
      ".$q6."
      ".$q7."
      ".$q8."
      ".$q9."
      ".$q10."
      ".$q11."
      ".$q12."
      ".$q13."
      ".$q14."
      ".$q15."
      ".$q16."
      ".$q17."
      ".$q18."
      ";


      $to1 = "myemail@foxmail.com";

      $subject = $studentnr . "sWeek1";
      $headers = "From: peter@mypage.comrn";
      $headers .= 'Content-Type: text/plain; charset=utf-8';

      mail($to1, $subject, $body, $headers);

      header("Location: email_success.php");

      ?>


      Any more tips please?







      php






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 43 mins ago







      Pedroski

















      asked 3 hours ago









      PedroskiPedroski

      1725




      1725
























          2 Answers
          2






          active

          oldest

          votes


















          4














          You can do that like this:



             for($i=1; $i <= 5; $i++) {
          $answer= ${'q' . $i};
          if($answer=='') $answer='X';
          }


          Edit:
          If you just only need to update value, you can do that like this,



             for($i=1; $i <= 5; $i++) {
          if(${'q' . $i}=='') ${'q' . $i}='X';
          }





          share|improve this answer


























          • Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

            – Pedroski
            2 hours ago













          • Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

            – Whatatimetobealive
            2 hours ago



















          3














          If you want to change any of the $q* variables to 'X' if they are empty, you can use PHPs variable variables to do that. For example:



          $q1 = '';
          $q2 = 'A';
          $q3 = '';
          $q4 = 'E';
          $q5 = 'D';
          for ($i=1; $i <= 5; $i++) {
          if (${"q$i"} == '') ${"q$i"} = 'X';
          }
          echo "$q1n";
          echo "$q2n";
          echo "$q3n";
          echo "$q4n";
          echo "$q5n";


          Output:



          X
          A
          X
          E
          D


          Demo on 3v4l.org






          share|improve this answer


























          • So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

            – Pedroski
            2 hours ago











          • @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

            – Nick
            2 hours ago











          Your Answer






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          2 Answers
          2






          active

          oldest

          votes








          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          4














          You can do that like this:



             for($i=1; $i <= 5; $i++) {
          $answer= ${'q' . $i};
          if($answer=='') $answer='X';
          }


          Edit:
          If you just only need to update value, you can do that like this,



             for($i=1; $i <= 5; $i++) {
          if(${'q' . $i}=='') ${'q' . $i}='X';
          }





          share|improve this answer


























          • Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

            – Pedroski
            2 hours ago













          • Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

            – Whatatimetobealive
            2 hours ago
















          4














          You can do that like this:



             for($i=1; $i <= 5; $i++) {
          $answer= ${'q' . $i};
          if($answer=='') $answer='X';
          }


          Edit:
          If you just only need to update value, you can do that like this,



             for($i=1; $i <= 5; $i++) {
          if(${'q' . $i}=='') ${'q' . $i}='X';
          }





          share|improve this answer


























          • Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

            – Pedroski
            2 hours ago













          • Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

            – Whatatimetobealive
            2 hours ago














          4












          4








          4







          You can do that like this:



             for($i=1; $i <= 5; $i++) {
          $answer= ${'q' . $i};
          if($answer=='') $answer='X';
          }


          Edit:
          If you just only need to update value, you can do that like this,



             for($i=1; $i <= 5; $i++) {
          if(${'q' . $i}=='') ${'q' . $i}='X';
          }





          share|improve this answer















          You can do that like this:



             for($i=1; $i <= 5; $i++) {
          $answer= ${'q' . $i};
          if($answer=='') $answer='X';
          }


          Edit:
          If you just only need to update value, you can do that like this,



             for($i=1; $i <= 5; $i++) {
          if(${'q' . $i}=='') ${'q' . $i}='X';
          }






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 2 hours ago

























          answered 3 hours ago









          WhatatimetobealiveWhatatimetobealive

          676411




          676411













          • Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

            – Pedroski
            2 hours ago













          • Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

            – Whatatimetobealive
            2 hours ago



















          • Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

            – Pedroski
            2 hours ago













          • Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

            – Whatatimetobealive
            2 hours ago

















          Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

          – Pedroski
          2 hours ago







          Thanks! It occurred to me that I need to reassign the $qs at the end. Like this maybe: for($i=1; $i <= 5; $i++) { $answer= ${'q' . $i}; if($answer=='') $answer='X'; ${'q' . $i} = $answer; } Will that be OK like that??

          – Pedroski
          2 hours ago















          Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

          – Whatatimetobealive
          2 hours ago





          Oh yes I just converted the python code as you requested. if you wanna replace with X just replace them directly on if statement. I ll update my answer.

          – Whatatimetobealive
          2 hours ago













          3














          If you want to change any of the $q* variables to 'X' if they are empty, you can use PHPs variable variables to do that. For example:



          $q1 = '';
          $q2 = 'A';
          $q3 = '';
          $q4 = 'E';
          $q5 = 'D';
          for ($i=1; $i <= 5; $i++) {
          if (${"q$i"} == '') ${"q$i"} = 'X';
          }
          echo "$q1n";
          echo "$q2n";
          echo "$q3n";
          echo "$q4n";
          echo "$q5n";


          Output:



          X
          A
          X
          E
          D


          Demo on 3v4l.org






          share|improve this answer


























          • So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

            – Pedroski
            2 hours ago











          • @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

            – Nick
            2 hours ago
















          3














          If you want to change any of the $q* variables to 'X' if they are empty, you can use PHPs variable variables to do that. For example:



          $q1 = '';
          $q2 = 'A';
          $q3 = '';
          $q4 = 'E';
          $q5 = 'D';
          for ($i=1; $i <= 5; $i++) {
          if (${"q$i"} == '') ${"q$i"} = 'X';
          }
          echo "$q1n";
          echo "$q2n";
          echo "$q3n";
          echo "$q4n";
          echo "$q5n";


          Output:



          X
          A
          X
          E
          D


          Demo on 3v4l.org






          share|improve this answer


























          • So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

            – Pedroski
            2 hours ago











          • @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

            – Nick
            2 hours ago














          3












          3








          3







          If you want to change any of the $q* variables to 'X' if they are empty, you can use PHPs variable variables to do that. For example:



          $q1 = '';
          $q2 = 'A';
          $q3 = '';
          $q4 = 'E';
          $q5 = 'D';
          for ($i=1; $i <= 5; $i++) {
          if (${"q$i"} == '') ${"q$i"} = 'X';
          }
          echo "$q1n";
          echo "$q2n";
          echo "$q3n";
          echo "$q4n";
          echo "$q5n";


          Output:



          X
          A
          X
          E
          D


          Demo on 3v4l.org






          share|improve this answer















          If you want to change any of the $q* variables to 'X' if they are empty, you can use PHPs variable variables to do that. For example:



          $q1 = '';
          $q2 = 'A';
          $q3 = '';
          $q4 = 'E';
          $q5 = 'D';
          for ($i=1; $i <= 5; $i++) {
          if (${"q$i"} == '') ${"q$i"} = 'X';
          }
          echo "$q1n";
          echo "$q2n";
          echo "$q3n";
          echo "$q4n";
          echo "$q5n";


          Output:



          X
          A
          X
          E
          D


          Demo on 3v4l.org







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 2 hours ago

























          answered 3 hours ago









          NickNick

          33.2k132042




          33.2k132042













          • So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

            – Pedroski
            2 hours ago











          • @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

            – Nick
            2 hours ago



















          • So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

            – Pedroski
            2 hours ago











          • @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

            – Nick
            2 hours ago

















          So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

          – Pedroski
          2 hours ago





          So I don't need to reassign variables via $answer, just directly reassign ${"q$i"} = 'X'; That's great, I'll try it asap!

          – Pedroski
          2 hours ago













          @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

          – Nick
          2 hours ago





          @Pedroski no, no need to use an intermediate variable, you can do it all in one line.

          – Nick
          2 hours ago


















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