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@NogDogSep 16.2010 — #The array key in the if() should be the same as the field (probably fang changed the key in the rest of the code and forgot to change it there), e.g.:
@NogDogSep 16.2010 — #You could simply add this after the two array sums are done:
?@NogDogSep 16.2010 — #
You're right, it's only the same if the same point value is used for each. How about...
@NogDogSep 17.2010 — #
They work, as long as you are sure the array will start with a known index, and that all of the elements are sequentially numbered. Foreach(), on the other hand, always works regardless of whether the array is sequentially indexed or not -- or even an associative array. ?
Form Elements With Same Name
I’m new to php and am confused as to how to make input boxes that have the same name ONE array, I tried putting brackets after the name but to no avail. [URL=”http://userpages.umbc.edu/~ofek1/gpa.html”]http://userpages.umbc.edu/~ofek1/gpa.html
report.php:
[CODE]<html>
<head>
</head>
<body>
<?php
$credits = $_POST[‘credits’];
$points = $_POST[‘points’];
$semester = $_POST[‘sem’];
/****************************************************************************
** TotalPoints – Totals the number of quality points earned
** Input – None
** Output – Total quality points earned
****************************************************************************/
function TotalPoints()
{
$numCredits = $credits;
$numPoints = $points;
$totalPoints = 0;
for ($i = 0; $i < count($numCredits); $i++)
{
$totalPoints = $totalPoints + ($numCredits[i] * $numPoints[i]);
}
echo $totalPoints;
}
/****************************************************************************
** TotalCredits – Totals the number of credits taken
** Input – None
** Output – Total credits taken
****************************************************************************/
function TotalCredits()
{
$numCredits = $credits;
$numPoints = $points;
$totalCredits = 0;
for ($i = 0; $i < count($numCredits); $i++)
{
$totalCredits = $totalCredits + $numCredits[i];
}
echo $totalCredits;
}
/****************************************************************************
** CalculateGPA – Divides total quality points by number of credits taken
** Input – None
** Output – Calculated GPA
****************************************************************************/
function CalculateGPA()
{
$finalGPA = TotalPoints() / TotalCredits();
$finalGPA = floatval($finalGPA);
echo $finalGPA;
}
/****************************************************************************
** GenerateGradeReport – Displays the grade report to the user
** Input – Semester
** Output – None
****************************************************************************/
function GenerateGradeReport($semester)
{
$finalGPA = CalculateGPA();
$totalCredits = TotalCredits();
$totalPoints = TotalPoints();
echo “GPA report for ” . $semester . “<br /><br />”;
echo “Credits taken: ” . $totalCredits . “<br /><br />”;
echo “Quality points earned: ” . $totalPoints . “<br /><br />”;
echo “GPA for ” . $semester . “: ” . number_format($finalGPA, 3) . “<br /><br />”;
}
GenerateGradeReport($semester);
?>
</body>
</html>
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0
@NogDogSep 16.2010 — #The array key in the if() should be the same as the field (probably fang changed the key in the rest of the code and forgot to change it there), e.g.:[code=php]
$credits = 0;
$points = 0;
if(isset($_POST['credits']) and is_array($_POST['credits'])) {
$credits = array_sum($_POST['credits']);
}
else {
// whatever you want to do if nothing received from form for 'credits'
}
if(isset($_POST['points']) && is_array($_POST['points'])) {
$points = array_sum($_POST['points']);
}
else {
// whatever you want to do if 'points' not received from form
}
// do whatever you want now with $credits and $points . . .
?>
[/code]0
@NogDogSep 16.2010 — #You could simply add this after the two array sums are done:[code=php]
$totalPoints = $credits * $points;
[/code]?
0
@NogDogSep 16.2010 — #That's not the same ?[/QUOTE]
You're right, it's only the same if the same point value is used for each. How about...
[code=php]
<?php
// test data:
$_POST = array(
'credits' => range(2, 6, 2),
'points' => range(7, 3, -2)
);
echo "<pre>".print_r($_POST,1)."</pre>n";
// process it:
$totalPoints = 0;
reset($_POST['points']);
if(count($_POST['credits']) == count($_POST['points'])) {
foreach($_POST['credits'] as $credits) {
$totalPoints += $credits * current($_POST['points']);
next($_POST['points']);
}
}
// result:
echo $totalPoints;
[/code]0
@NogDogSep 17.2010 — #Hahaha, sorry Fang, NogDog. For loops DO work on arrays in PHP....[/quote]
They work, as long as you are sure the array will start with a known index, and that all of the elements are sequentially numbered. Foreach(), on the other hand, always works regardless of whether the array is sequentially indexed or not -- or even an associative array. ?