Steps to write php code and see Output
1. Open XAMPP
2. Start Apache and MySQL
3. Open text editors like Sublime , Notepad++ etc
4. Save -> Local disk(c) -> XAMPP -> htdocs -> filename.php
5. Type the code and save it
6. Click web browser like chrome type localhost/filename.php 7. Press Enter key
1. WAP to find sum of two numbers. Here, numbers are entered via html form.
<h1> PHP program to find sum of two numbers</h1>
<form method="post">
First Number :
<input type="text" name="firstnum"><br><br>
Second Number :
<input type="text" name="secondnum"><br><br>
<input type="submit" name="submit" value="sum">
</form>
<?php
if(isset($_POST['submit']))
{
$n1=$_POST['firstnum'];
$n2=$_POST['secondnum'];
$s=$n1+$n2;
echo "Sum of two numbers is ".$s;
}
?>
2. Write a PHP program to swap two numbers.
<h2>PHP program to swap two numbers</h2>
<form method="post">
First Number :
<input type="text" name="num1"><br><br>
Second Number :
<input type="text" name="num2"><br><br>
<input type="submit" name="submit" value="submit">
</form>
<?php
if(isset($_POST['submit'])) {
$a=$_POST['num1'];
$b=$_POST['num2'];
echo " Before swapping ";
echo " <br>First Number ".$a;
echo " <br> Second Number ".$b;
$temp=$a;
$a=$b;
$b=$temp;
echo " <br>After swapping ";
echo "<br>First Number ".$a;
echo "<br> Second Number ".$b;
}
?>
3. Write a PHP program to input name and address using form and display them.
<h2> PHP program to enter name and address </h2>
<form method="post">
Enter Name: <input type="text" name="name"><br><br>
Enter Address : <input type="text" name="address"><br><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
if(isset($_POST['submit'])){
$n=$_POST['name'];
$a=$_POST['address'];
echo "<br> Name = ".$n;
echo "<br> Address = " .$a;
}
?>
4. Write a PHP program to find the greatest number among three numbers. Here, numbers are entered via html form.
<h2> PHP program to find greatest number among three numbers</h2>
<form method="post">
First Number :
<input type="text" name="num1">
<br><br>
Second Number:
<input type="text" name="num2">
<br><br>
Third Number:
<input type="text" name="num3">
<br><br>
<input type="submit" name="submit">
</form>
<?php
if(isset($_POST['submit']))
{
$n1=$_POST['num1'];
$n2=$_POST['num2'];
$n3=$_POST['num3'];
if($n1>$n2&&$n1>$n3)
echo $n1;
else if($n2>$n1&&$n2>$n3)
echo $n2;
else
echo $n3;
}
?>
5. Write a PHP program to input any number via form and check whether the number is positive or negative and be sure number should not be zero.
<h2> PHP program to input any number via form and check whether the number is positive or negative and be sure number should not be zero</h2>
<form method="post">
Enter number:
<input type="text" name="num"><br><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
if(isset($_POST['submit'])){
$n=$_POST['num'];
if($n==0)
echo '<script>alert("Enter non zero number")</script>';
else if($n>0)
echo "Positive number";
else
echo "Negative number";
}
?>
6. Write a PHP program to display your name 100 times.
<?php
$name = "Alex Lal Karn";
for($i=0;$i<100;$i++)
{
echo $name;
echo "<br>";
}
?>
7. Write a PHP program to print a multiplication table of a number. Input the number via form.
<form method="post">
Enter Number:
<input type="text" name="num">
<br><br>
<input type="submit" name="submit">
</form>
<?php
if(isset($_POST['submit']))
{
$n=$_POST['num'];
for($i=1;$i<=10;$i++)
{
echo $n*$i;
echo '<br>';
}
}
?>
8. Write a PHP program to display the factorial value of a number.
<form method="post">
Enter number :
<input type="text" name="num"><br><br>
<input type="submit" name="submit">
</form>
<?php
if(isset($_POST['num']))
{
$n=$_POST['num'];
$f=1;
for($i=1;$i<=$n;$i++){
$f=$f*$i;
}
echo "Factorial = ".$f;
}
?>
9. Write a PHP to print factors of a number.
<form method="post">
Enter number :
<input type="text" name="num"><br><br>
<input type="submit" name="submit">
</form>
<?php
if(isset($_POST['num']))
{
$n=$_POST['num'];
$f=1;
for($i=1;$i<=$n;$i++)
{
if($n%$i==0)
{
echo $i;
echo "<br>";
}
}
}
?>
10. Write a PHP program to store some strings in an array and print them.
<?php
$subjects = array("Compulsory English", "Compulsory Nepali", "Social","Accounts","Economics","Computer");
for ($i=0;$i<count($subjects);$i++)
{
echo $subjects[$i];
echo "<br>";
}
?>
11. Write a PHP program to sort data stored in an array. [Use sort() function and print_r() to print.]
<?php
$numbers = array(2,0,4,5);
sort($numbers);
print_r($numbers);
?>
12. Write a PHP program to know whether two strings are the same or not.
<?php
$str1 = "Alex Lal Karn";
$str2 = "Computer Science";
if(strcmp($str1, $str2) == 0){
echo "Strings are same";
}else{
echo "Strings are not same";
}
?>
13. Write a PHP program to input a string through a text box and find its length.[use strlen()]
<form method="post">
<input type="text" name="userText" placeholder="Enter text">
<input type="submit" value="Find Length">
</form>
<?php
if(isset($_POST['userText']))
{
$str=$_POST["userText"];
echo "Length=".strlen($str);
}
?>
14. Write a PHP program to connect a database named ‘student’.
<?php
$servername="localhost";
$username="root";
$password="";
$dbname="student";
$conn=new mysqli($servername,$username,$password,$dbname);
if($conn->connect_error)
die("Connection failed:".mysqli_connect_error());
else
echo "Database connected successfully";
?>
15. Write a PHP program to insert records in a database named student with fields id, name and grade.
<?php
$servername="localhost";
$username="root";
$password="";
$dbname="student";
$conn=new mysqli($servername,$username,$password,$dbname);
if($conn->connect_error)
die("Connection failed:".mysqli_connect_error());
else
echo "Database connected successfully";
$sql="insert into studentrec (id,name,grade)values (101,'Tsering Sherpa',12)";
if($conn->query($sql)===true)
{
echo "Inserted data successfully";
}
else{
echo "Error in inserting data:".$conn->error;
}
$conn->close();
?>
16. Write a PHP program to display all records (previous question) of students who are in grade 11.
<?php
$servername="localhost";
$username="root";
$password="";
$dbname="student";
$conn=new mysqli($servername,$username,$password,$dbname);
if($conn->connect_error){
die("Connection failed:".mysqli_connect_error());
}
$sql="SELECT *FROM studentrec WHERE grade='11'";
$result=$conn->query($sql);
if($result->num_rows>0)
{
while($row=$result->fetch_assoc())
{
echo "<br> id:".$row["id"]." - Name: ".$row["name"]." - Grade : ".$row["grade"];
}
}
else {
echo "0 results";
}
$conn->close();
?>
17. Write a PHP program to delete records of a student whose id is 3.[previous question]
<?php
$servername="localhost";
$username="root";
$password="";
$dbname="student";
$conn=new mysqli($servername,$username,$password,$dbname);
if($conn->connect_error)
die("Connection failed:".mysqli_connect_error());
$sql="DELETE FROM studentrec WHERE id=3";
if($conn->query($sql)===true)
{
echo "Data deleted ";
}
else{
echo "Error in deleting data:".$conn->error;
}
$conn->close();
?>
18. Write a PHP program to update a record of student whose id is 2.[Try same program with name/grade.]
<?php
$servername="localhost";
$username="root";
$password="";
$dbname="student";
$conn=new mysqli($servername,$username,$password,$dbname);
if($conn->connect_error)
die("Connection failed:".mysqli_connect_error());
else
echo "Database connected successfully";
$sql="UPDATE studentrec SET name='ABC' WHERE id=2;";
if($conn->query($sql)===true)
{
echo "Data updated successfully";
}
else{
echo "Error in data update :".$conn->error;
}
$conn->close();
?>
Case Study
1. Download a webpage template
2. It contains some navigations menu like Home, About, Gallery, Register and view records. Here view records contain update and delete buttons.
Click for reference answer