Programming Wala: Codes and Tutorials: PHP

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PHP code to find the sum of digits of a number using for loop

This program finds the sum of the digits of the given number using for loop.

Code

<html>

<head>

<title>SUM OF THE DIGITS</title>

</head>

<body>

<font size=5>SUM OF THE DIGITS</font>

<br/><br/>

<form action=sum-of-digits.php method="post">

ENTER NUMBER:<input type="text" name="t1">

<br><br>

<input type="submit" value="SUM">

<?php

if(isset($_POST["t1"]))

{

 $n=$_POST["t1"];

  $sum = 0;

 for(;$n>0;$n=floor($n/10))

 {

  $b=$n%10;

 $sum=$sum+$b;

 }

 echo "sum of digit is:$sum";

}

?>

</form>

</body>

</html>

Output

Sum of the digits of a number

PHP Code to find the reverse of a number

Description

This program finds the reverse of a number using do while loop.

code

<html>
<head>
<title>REVERSE OF A NUMBER</title>
</head>
<body>
<font size=7>REVERSE OF A NUMBER</font>
<form action=reverse.php method="post">
ENTER NUMBER:<input type="text" name="t1">
<br><br>
<input type="submit" value="REVERSE">
<?php
if(isset($_POST["t1"]))
{
$n=$_POST["t1"];
$rev=0;
do
{
$t=$n%10;
$rev=($rev*10)+$t;
$n=floor($n/10);
}
while($n>0);
echo 'Reverse is ';
echo $rev;
}
?>
</form>
</body>
</html>

Output

PHP Program to find the reverse of a number

PHP program to find factorial using while loop

Code

<html>
<head>
<title>FACTORIAL OF A NUMBER</title>
</head>
<body>
<font size=5>FACTORIAL OF A NUMBER</font>
<br/>
<br/>
<form action=factorial.php method="post">
ENTER A NUMBER:<input type="text" name="t1">
<br><br>
<input type="submit" value="FACTORIAL">
<?php
if(isset($_POST["t1"]))
{
$n=$_POST["t1"];
$fact=1;
echo "<br/>
<br/>";
echo "Factorial of $n is: ";

while($n>0)
{
$fact=$fact*$n;
$n--;
}
echo "$fact";
}
?>
</form>
</body>
</html>

Output

PHP program to find factorial using while loop

PHP program to find the factorial of a number

PHP code to find the largest of 3 numbers

Explanation of the code

This program finds the largest of three numbers. The three text boxes named t1, t2 and t3 is used to read the numbers. The php code will execute only if the submit button is clicked, this is achieved by using the statement if(isset($_POST["submit"])). When the submit button is clicked, the values entered in the text boxes will be stored in the variables n1, n2 and n3 respectively. Then the program will find the largest of these three numbers using if else condition check.

PHP code

<html>

<head>

<title>GREATEST OF THREE NUMBERS</title>

</head>

<body>

<font size=5>LARGEST OF THREE NUMBERS</font>
<br/>
<br/>

ENTER FIRST NUMBER:<input type="text" name="t1">

ENTER SECOND NUMBER:<input type="text" name="t2">

ENTER THIRD NUMBER:<input type="text" name="t3">

<?php

if(isset($_POST["submit"]))

{

$n1=$_POST["t1"];

$n2=$_POST["t2"];

$n3=$_POST["t3"];

if($n1>$n2)

{

if($n1>$n3)

echo "$n1 is greater";

else

echo "$n3 is greater";

}

else if($n2>$n3)

{

if($n2>$n1)

{

echo "$n2 is greater";

}

else

{

echo "$n3 is greater";

}}}

</form>

</body>

</html>

Output

Largest of three numbers in PHP