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POAccessing a POST variable in another PHP File
 

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  1. POAccessing a POST variable in another PHP File
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/14331479/simplest-method-of-passing-one-php-variable-in-a-url">Simplest method of passing one php variable in a url</a> </p> </blockquote> <p>I am making a quiz application. At the faculty end, teachers get to type the topic name (with which I will form a vanity URL), and type 3 questions with possible options including answer in one of them. Everytime a teacher creates a quiz, a new table will be created with the questions, options and answers everytime.</p> <p>My db.php file:</p> <pre><code>&lt;?php mysql_connect("localhost","root",""); mysql_select_db("quiz"); ?&gt; </code></pre> <p>My faculty.php file: </p> <pre><code>&lt;form action="fac_handler.php" method="POST"&gt; Quiz Topic:&lt;br&gt;&lt;input type="text" name="topic"&gt;&lt;br&gt;&lt;br&gt;Enter Questions:&lt;br&gt;&lt;br&gt; &lt;?php $a="a"; $b="b"; $c="c"; $d="d"; for ($i=1; $i&lt;=3;$i++) { ?&gt; Question &lt;?php echo $i?&gt;:&lt;br&gt; &lt;textarea type="text" name="&lt;?php echo "q".$i;?&gt;"&gt;&lt;/textarea&gt;&lt;br&gt; &lt;br&gt; &lt;input type="text" name="&lt;?php echo $a.$i; ?&gt;"&gt;&amp;nbsp;&amp;nbsp; &lt;input type="text" name="&lt;?php echo $b.$i; ?&gt;"&gt;&amp;nbsp;&amp;nbsp; &lt;input type="text" name="&lt;?php echo $c.$i; ?&gt;"&gt;&amp;nbsp;&amp;nbsp; &lt;input type="text" name="&lt;?php echo $d.$i; ?&gt;"&gt;&amp;nbsp;&amp;nbsp;&lt;br&gt;&lt;hr&gt; &lt;?php } ?&gt; &lt;br&gt; &lt;input type="submit" value="Submit"&gt; &lt;/form&gt; </code></pre> <p>My fac_handler.php file:</p> <pre><code>&lt;?php require "db.php"; if(isset($_POST['topic']) &amp;&amp; !empty($_POST['topic'])) { $topic=$_POST['topic']; if(isset($_POST['q1'])&amp;&amp;isset($_POST['a1'])&amp;&amp;isset($_POST['b1'])&amp;&amp;isset($_POST['c1'])&amp;&amp;isset($_POST['d1'])) { if(!empty($_POST['q1']) &amp;&amp; !empty($_POST['a1']) &amp;&amp; !empty($_POST['b1']) &amp;&amp; !empty($_POST['c1']) &amp;&amp; !empty($_POST['d1'])) { $q1=$_POST['q1']; $a1a=$_POST['a1']; $a1b=$_POST['b1']; $a1c=$_POST['c1']; $a1d=$_POST['d1']; } else { echo "Please Set the Questions and the Options!"; die(); } } if(isset($_POST['q2'])&amp;&amp;isset($_POST['a2'])&amp;&amp;isset($_POST['b2'])&amp;&amp;isset($_POST['c2'])&amp;&amp;isset($_POST['d2'])) { if(!empty($_POST['q2']) &amp;&amp; !empty($_POST['a2']) &amp;&amp; !empty($_POST['b2']) &amp;&amp; !empty($_POST['c2']) &amp;&amp; !empty($_POST['d2'])) { $q2=$_POST['q2']; $a2a=$_POST['a2']; $a2b=$_POST['b2']; $a2c=$_POST['c2']; $a2d=$_POST['d2']; } else { echo "Please Set the Questions and the Options!"; die(); } } if(isset($_POST['q3'])&amp;&amp;isset($_POST['a3'])&amp;&amp;isset($_POST['b3'])&amp;&amp;isset($_POST['c3'])&amp;&amp;isset($_POST['d3'])) { if(!empty($_POST['q3']) &amp;&amp; !empty($_POST['a3']) &amp;&amp; !empty($_POST['b3']) &amp;&amp; !empty($_POST['c3']) &amp;&amp; !empty($_POST['d3'])) { $q3=$_POST['q3']; $a3a=$_POST['a3']; $a3b=$_POST['b3']; $a3c=$_POST['c3']; $a3d=$_POST['d3']; } else { echo "Please Set the Questions and the Options!"; die(); } } $ans1=$a1a; $ans2=$a2a; $ans3=$a3a; $qtbname="q_".$topic; $top=$_SESSION['topic']=serialize($_POST['topic']); $new="q_".$top; $create_table="CREATE TABLE $qtbname(id int NOT NULL AUTO_INCREMENT,question VARCHAR(500),answer VARCHAR(30),optiona VARCHAR(30),optionb VARCHAR(30),optionc VARCHAR(30),optiond VARCHAR(30),PRIMARY KEY (id))"; mysql_query($create_table); $query1="INSERT INTO $qtbname VALUES('','$q1','$ans1','$a1a','$a1b','$a1c','$a1d')"; $query2="INSERT INTO $qtbname VALUES('','$q2','$ans2','$a2a','$a2b','$a2c','$a2d')"; $query3="INSERT INTO $qtbname VALUES('','$q3','$ans3','$a3a','$a3b','$a3c','$a3d')"; $result1=mysql_query($query1); $result2=mysql_query($query2); $result3=mysql_query($query3); header("Location: student.php"); } else { echo "Please Set the Quiz Topic"; } ?&gt; </code></pre> <p>Now as you can see, after the table gets created dynamically everytime with a table prefix, it gets redirected to student.php file which looks like this. </p> <p>My student.php file:</p> <pre><code>&lt;?php require "db.php"; $query="SELECT * FROM $new"; $result=mysql_query($query); $n="1"; $i="a"; while($row=mysql_fetch_assoc($result)) { echo "Question ".$n." : ".$row['question']; echo "&lt;br&gt;"; $ansr=$row['answer']; ?&gt; &lt;form action="std_handler.php" method="POST"&gt; &lt;input type="radio" name="&lt;?php echo $i; ?&gt;" value="&lt;?php echo $row['optiona']; ?&gt;"&gt;&lt;?php echo $row['optiona']; ?&gt; &lt;input type="radio" name="&lt;?php echo $i; ?&gt;" value="&lt;?php echo $row['optionb']; ?&gt;"&gt;&lt;?php echo $row['optionb']; ?&gt; &lt;input type="radio" name="&lt;?php echo $i; ?&gt;" value="&lt;?php echo $row['optionc']; ?&gt;"&gt;&lt;?php echo $row['optionc']; ?&gt; &lt;input type="radio" name="&lt;?php echo $i; ?&gt;" value="&lt;?php echo $row['optiond']; ?&gt;"&gt;&lt;?php echo $row['optiond']; ?&gt;&lt;br&gt; &lt;?php ++$i; ++$n; } ?&gt; &lt;input type="submit" value="Submit"&gt; &lt;/form&gt; </code></pre> <p>The fourth line in this student.php file, the query, <strong>$query="SELECT * FROM $new";</strong>, I need to access the table which I just created at the faculty end to display the questions and answers in text and radio button format. </p> <p>Here is my std_handler.php file:</p> <pre><code>&lt;?php if(isset($_POST['a'])) { $ans=$_POST['a']; echo $ans; echo "&lt;br&gt;"; } if(isset($_POST['b'])) { $ans=$_POST['b']; echo $ans; echo "&lt;br&gt;"; } if(isset($_POST['c'])) { $ans=$_POST['c']; echo $ans; echo "&lt;br&gt;"; } ?&gt; </code></pre> <p>In the faculty handler file, after the validations, I tried to use session and get the variable, I tried to make it global, I tried serializing it, I couldn't succeed to use and select the dynamic table name in the student.php page.</p> <p>What I want is, as soon as I get redirected to the student.php page, I want to select the table instantly created earlier, how do I do that? How do I access that variable with which I created the table and executed the query at the faculty end?</p> <p>I keep getting this error: <strong>Notice: Undefined variable: new in C:\xampp\htdocs\quiz\student.php on line 4</strong></p> <p>Please help me solve this problem. Thank you. </p>
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    1. CODon't create a new table for each quiz! Learn about database normalization.
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    2. COI am making this for my university, so there will be hell lot of quizzes made from time to time by the teachers. And I am going to store the results in another table. But I will give it a thought about DB normalization.
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    3. COAnd my question is not a duplicate of that link you gave. It is entirely different I believe. I am not talking of passing a php variable in a url here. I am asking about how to use a variable in a query of another php file.
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