array_rand problem

[fergie223]

The array seems to be taking in the data but it doesnt seem to be able to output the array random. is there another way of doing it.

 

The problems seems to be coming from here. any help much appreciated. thanks in advance

 

$Question = array_rand($Avail_Questions, 1);

 

 

<?php
#include("dbVariables.php");


require("Database_link.inc");
#connect to database



$SQL = "SELECT * FROM quizgen ORDER BY qID";
$result = mysqli_query($DB_Server, $SQL);# or die("unable to query database".mysql_error);


$Avail_Questions=array();
$i=0;

while ($dbRow=mysqli_fetch_array($result)) {
$Avail_Questions[$i++] = $dbRow;
}

#get data into the array

echo $Avail_Questions[0][4];
echo $Avail_Questions[1][0];
echo $Avail_Questions[2][2];
echo $Avail_Questions[3][10];

echo '<form action = "genresult2.php" method = "POST" >\n';

$Questions_Incr = 1;
$ten_Q = 1;
while($ten_Q <= 10) {
#loop througbh 10 questions and display them
$Question = array_rand($Avail_Questions, 1);
#select a random question

if(empty($Question)) {echo "EMPTY ARRAY";}

#show that question




echo "<p>In which year did ".$Question['teama']." defeat ".$Question['teamb']."?</p>\n";
   # echo "<p>In which year did ".$Avail_Questions[$ten_Q]['teama']." defeat ".$Avail_Questions[$ten_Q]['teamb']."?</p>\n";

#echo "<input type = 'hidden' name = 'qID' value = '".$Avail_Questions[$ten_Q]['qID']."'></input>\n";

             echo "<input type = 'hidden' name = 'qID' value = '".$Question['qID']."'></input>\n";

echo "<p>a) <input type = 'radio' name = '".$Questions_Incr."' value = '".$Question['Optn_1']."'></input></p>\n";
echo "<p>b) <input type = 'radio' name = '".$Questions_Incr."' value = '".$Question['Optn_2']."'></input></p>\n";
echo "<p>c) <input type = 'radio' name = '".$Questions_Incr."' value = '".$Question['Optn_3']."'></input></p>\n";
echo "<p>d) <input type = 'radio' name = '".$Questions_Incr."' value = '".$$Question['Optn_4']."'></input></p>\n";
echo "<input type = 'hidden' name = '".$Question_Incr."answer' value = '".$Question['Answer']."'></input>\n";
#echo "<input type = 'hidden' name = 'qID' value = '".$Question['qID']."'></input>\n";

unset($Question); #stop that question from being displayed again
$ten_Q ++;

$Questions_Incr ++;
}

echo "<p>Finished? <input type = 'submit' value = 'Check!'></input></p>\n";
echo "<p>Restart? <input type = 'reset' value = 'Start Again'></input></p>\n";

echo "<br><br><br><Br><Br><Br><br>\n";

?>


</body>

</html>

 

 

[per1os]

This might help

 

$Question = array_rand($Avail_Questions, 1);
$Question = $Avail_Questions[$Question[0]];

 

 

[fergie223]

This might help

 

$Question = array_rand($Avail_Questions, 1);
$Question = $Avail_Questions[$Question[0]];

 

 

 

Sorry no good. Thanks anyway.

[per1os]

Example 258. array_rand() example

<?php

srand((float) microtime() * 10000000);

$input = array("Neo", "Morpheus", "Trinity", "Cypher", "Tank");

$rand_keys = array_rand($input, 2);

echo $input[$rand_keys[0]] . "\n";

echo $input[$rand_keys[1]] . "\n";

?>

 

from www.php.net/array_rand

 

From the above it does not seem like you are using the correct logic. The array returned is simply the index of the random variable.

 

I would highly suggest looking through the user comments and reading up on that function.