I've a following html table which name contain array. How can i check this array if it's value is empty ?
echo "<input type='radio' name='ch[$roll][$sname][$class]' value='1' /> ";
echo "<input type='radio' name='ch[$id][$sname][$class]' value='0' />";
Currently i'm checking it with following code, it's not working but i know the name is array and it's must be compare with any array function. Can you guys give me a idea ?
if(isset($_POST['ch']))
{
$ch = $_POST['ch'];
if(empty($ch))
echo "<div class='error>Select attendence field. </div>";
}
Regards.
Update: (Full Code)
$action = htmlspecialchars($_SERVER['PHP_SELF'])."?class=$class_from";
echo "<form method='post' action='$action' name='attendence'/>";
echo "<table width='100%' cellpadding='0' cellspacing='0' border='0'>";
echo "<tr>";
echo "<td class='tdhead' valign='top' width='200'><b>Student Name</b></td>";
echo "<td class='tdhead' valign='top' width='250'><b>Roll No</b>
</td>";
echo "<td class='tdhead' valign='top' width='250'><b>Class Name</b>
</td>";
echo "<td class='tdhead' valign='top' width='200'><b>Present / Not present</b>
</td>";
echo "<td class='tdhead' valign='top' width='200'>
Present All <input type= 'checkbox'
onclick='checkAll(this)'</td>";
echo "</tr>";
//start the counter variable
$counter = 1;
while($res2 = mysql_fetch_array($sql2))
{
$id = (int) $res2['id'];
$sname = inputvalid($res2['sname']);
$roll = inputvalid($res2['roll']);
$class = inputvalid($res2['class']);
echo "<tr>";
echo "<td class='tdhead2' valign='top'>$sname</td>";
echo "<td class='tdhead2' valign='top'>$roll</td>";
echo "<td class='tdhead2' valign='top'>$class</td>";
echo "<td class='tdhead2' valign='top'>";
//echo each radio with the counter for this row
echo "<input type='radio' name='ch[$roll][$sname][$class]' value='1' /> ";
echo "<input type='radio' name='ch[$id][$sname][$class]' value='0' />";
echo "</td>";
echo "<td class='tdhead2' valign='top'> </td>";
echo "</tr>";
//add one to the counter
$counter++;
}
echo "<tr>";
echo "<td class='tdhead2'> </td>";
echo "<td class='tdhead2'> </td>";
echo "<td class='tdhead2'> </td>";
echo "<td class='tdhead2'> </td>";
echo "<td class='tdhead2'><input type='submit' value='Record' name='Submit'
class='submit' /></td>";
echo "</tr>";
echo "</table>";
echo "</form>";
if(isset($_POST['Submit']) && $_POST['Submit'] == "Record")
{
if(isset($_POST['ch']))
{
$ch = array_filter($_POST['ch']);
if (empty($ch))
{
echo "<div class='error>Select attendence field. </div>";
}
}
if(count($ch) == 0)
{
echo "<div class='error>Select attendence field. </div>";
}
else
{
foreach ($_POST['ch'] as $roll => $arr1)
{
$roll;
foreach ($arr1 as $name => $arr2)
{
$name;
foreach ($arr2 as $class => $value)
{
$class;
$value;
$sql = mysql_query("INSERT INTO e_attendence VALUES('', '$name', '$roll', '$class',
'$value', '$current_date')");
}
}
}
}
if($sql)
echo "<div class='success'>Succesfully recorded.
</div>";
}
use empty()
instead of isset()
check the comparison table available at the below link
empty() method work for finding whether the array is empty or not.
But for Your solution use below:-
if(isset($_POST['ch']) && $_POST['ch']=='1')
{
$ch = $_POST['ch'];
if(empty($ch))
echo "<div class='error>Select attendence field. </div>";
}
if You want to show a error message when no radio is selected then use below code:-
if(!isset($_POST['ch']) && $_POST['ch']=='')
{
echo "You have not selected any radio button";
}
Try this
if(isset($_POST['ch'])){
$ch = array_filter($_POST['ch']);
if (empty($ch)) {
echo "<div class='error>Select attendence field. </div>";
}
}
尝试这个
print_r($_POST['ch']);
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