<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>Midterm</title>
</head>
<body>
<?php
ini_set ('display_errors', 1);
error_reporting (E_ALL & ~ E_NOTICE);
//read questions file
function read_file ( $file ){
//get handle to file
$handle = fopen ( $file , "r" );
//if $handle is false, the file wasn't found
if ( $handle == false ){
die ( "File not found!" );//notify programmer of error
}
//get size of file
$size = filesize ( $file );
// if size is zero, the file contains nothing
if ($size == 0 ){
die ( "This file contains nothing!" );//notify programmer of error
}
//read contents of file using fread
$contents = htmlspecialchars(fread( $handle, $size ));
//if $contents is NULL, the file is empty
if ( $contents == NULL ){
die ( "This file is empty!" );
}
//close handle to file
fclose ($handle);
//return file contents
return $contents;
}
//read file questions.txt
$all_questions = read_file ( "questions.txt" );
//use explode to put list of questions separated by a ~ into an array
$all_questions = explode ( "~" , $all_questions );
//read file choices.txt
$mixed_choices = read_file ( "choices.txt" );
//use explode to put list of choices separated by a ~ into an array
$mixed_choices = explode ( "~" , $mixed_choices );
//read file answers.txt
$answers = read_file ( "answers.txt" );
//use explode to put list of answers separated by a ~ into an array
$answers = explode ( "~" , $answers );
echo "<form action='grade.php' method='post'>";
//loop for five questions
for ($q = 1; $q <= 5; $q++){
$group = "group$q";
//prepare counters for the outer and inner arrays
$arrCount = 0;
$itemCount = 0;
//loop through the $mixed_chices array, putting every 4 items into a
//different index of all_choices array
for($i = 0; $i < count($mixed_choices); $i++) {
//if there are 4 items in the current index of the outer array, change index
if($itemCount == 4) {
$itemCount = 0;
$arrCount++;
}
$all_choices[$arrCount][$itemCount] = $mixed_choices[$i];
$itemCount++;
}
//get 4 random question and their choices and print
$limit = rand(0, (count($all_questions)-1));
echo $all_questions[$limit] . "<br />";
//output the possible choices
for($i = 0; $i < count($all_choices[$limit]); $i++) {
//set up $value to hold value of radio button
if ( $i == 0){
$value = "A";
}
else if ( $i == 1){
$value = "B";
}
else if ( $i == 2){
$value = "C";
}
else if ( $i == 3){
$value = "D";
}
echo "<input type='radio' name='<?php $group ?>' value='<?php $value ?>' />" . $all_choices[$limit][$i] . "<br />";
}
echo "<br />";
//add correct answers to $answer_key
$answer_key = array ( );
array_push ($answer_key, $answers[$limit]);
//display answer for testing purposes
foreach($answer_key as $value){
echo "<p>" . $value . "</p>";
}
}
$fp=fopen("answer_key.txt","w+");
foreach($answer_key as $value){
fwrite($fp,$value."~");
}
//submit button
echo "<br /> <input type='submit' name='submit' value='Grade Exam' /> </form>";
?>
</body>
</html>
I just canged the code to try something different and it is still only writing the last element with this code too.
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