对于我的一个项目，由要设计的个别学生得分。 有4个班级（第7,8个9th和10th），每个班级大约有25名学生（他们的Roll_No是：1001,1002,1003,1004...）分数按顺序给出：物理、化学、数学和英语。
上述标记的三维数组：
$marks = array(
"7" => array(
"1001" => array(90, 95, 98, 78),
"1002" => array(91, 90, 93, 77),
"1003" => array(88, 83, 90, 68),
"1004" => array(90, 91, 90, 80)
),
"8" => array(
"1001" => array(88, 90, 95, 77),
"1002" => array(91, 92, 94, 75),
"1003" => array(90, 90, 95, 66),
"1004" => array(90, 92, 88, 70)
),
..................................
..................................
"10" => array(
"1001" => array(81, 91, 95, 79),
"1002" => array(92, 92, 95, 85),
"1003" => array(91, 90, 91, 62),
"1004" => array(88, 90, 89, 78)
)
);
我没有将这些细节放在三维数组中，而是将它们放在一维数组中：
//class, Roll_no, physics, chemistry, maths, English
$marks = array(7, 1001, 90, 95, 98, 78),
(7, 1002, 91, 90, 93, 77),
(7, 1003, 88, 83, 90, 68),
(7, 1004, 90, 91, 90, 80),
(8, 1001, 88, 90, 95, 77),
(8, 1002, 91, 92, 94, 75),
(8, 1003, 90, 90, 95, 66),
(8, 1004, 90, 92, 88, 70)
);
我的 HTML 代码是：
<form method="post" name="data" action="mark.php">
Enter class:
<select name="class">
<option value="7"> 7th Class
<option value="8"> 8th Class
<option value="9"> 9th Class
<option value="10"> 10th Class
</select>
<br> Enter Roll no:
<select name="roll_no">
<option value="1001"> Roll no:1001
<option value="1002"> Roll no:1002
<option value="1003"> Roll no:1003
<option value="1004"> Roll no:1004
</select>
<br><input type="submit" value="submit">
</form>
我的PHP代码是：
if ($_POST) {
$class = $_POST['class'];
$roll_no = $_POST['roll_no'];
$ans1 = $marks[$class][$roll_no][2]; // marks in Physics
$ans2 = $marks[$class][$roll_no][3]; // marks in chemistry
$ans3 = $marks[$class][$roll_no][4]; // marks in maths
$ans4 = $marks[$class][$roll_no][5]; // marks in english
echo "The marks scored in Physics by Roll no: $roll_no (Class: $class th): $ans1 <br>";
echo "The marks scored in Chemistry by Roll no: $roll_no (Class: $class th): $ans2 <br>";
echo "The marks scored in Maths by Roll no: $roll_no (Class: $class th): $ans3 <br>";
echo "The marks scored in English by Roll no: $roll_no (Class: $class th): $ans4 <br>";
}
但它显示错误。任何人都可以帮助我更正代码吗？
如果你喜欢循环，试试这段代码
$count = sizeof($marks);
for($i=0;$i<$count;$i++)
{
if($marks[$i][0] == $class && $marks[$i][1] == $$roll_no)
{
echo 'Yes';
}
}