Hello everyone
I was practicing php arrays and my editor cannot detect an error I have with my php however when it runs I get the error message
Warning: Undefined array key 3 in php
while still printing the output correctly.
my html form is:
<!DOCTYPE html>
<html>
<head><title>Number of Students</title></head>
<body>
<form action="Q4.php">
<table>
<tr>
<td>Number of Students:</td>
<td><input type="text" name="num" size="5"></td>
<td><input type="submit" value="Submit"></td>
</tr>
</table>
</form>
</body>
</html>
my php form is:
<!DOCTYPE html>
<html>
<head><title>Number of Students</title></head>
<body>
<form action="Q4index.php">
<table border=1 cellspacing=0 cellpadding=3>
<tr><th>Student</th><th>Mark</th></tr>
<?php
$num = $_GET["num"];
for($i=1; $i<=$num; $i++){
echo"<tr><td><input type=text name=stud[] size=7></td>
<td><input type=text name=mark[] size=5></td></tr>";
}
?>
<tr><td><input type="submit" value="Submit"></td><td><input type="Reset" value="Reset"</td></tr>
</table>
</form>
</body>
</html>
and the php program file to run it all is:
<!DOCTYPE html>
<html>
<head><title></title></head>
<body>
<h3>The students who passed the exam:</h3>
<table border="1" cellspacing="0" cellpadding="3">
<tr><th>Name</th><th>Total Mark</th></tr>
<?php
//Declaration of Arrays
$name=$_GET["stud"];
$mark=$_GET["mark"];
//Loop and Conditions
for($i=0; $i<=count($name); $i++){
if($mark[$i]>=50){
//Printing
echo"<tr><td>$name[$i]</td><td>$mark[$i]</td></tr>";}
}
?>
</table>
</body>
</html>
After entering sample data in the forms and trying to execute the code this error message appears:
Screenshot of error
Can someone please tell me what my code is missing? Thank you in advance and I’m beyond grateful for your patience with my questions 🙂
>Solution :
Remove ‘=’ in condition "$i<=count($name)".
Write "$i < count($name)".