Program 1
How To Assign a value to a user define variable and to display it on execution?
<html>
<head></head>
<body>
<?php
$name = 'Rajat';
$class = 'BTECH';
$serialNumber = 1;
echo " I am $name studying in $class. My serial number is $serialNumber.";
?>
</body>
</html>
EXPLANATION
In this program $name,$class and $serialNumber are user define variable.
and we will assign values to thses variables like $name = 'Rajat'; it means Rajat is assign to $name means $name contain the name Rajat.
$class = 'BTECH'; it means BTECH is assign to $class means $class contain BTECH.
The text value that should be assigned to user define variable should be writted between' ' comma and ends by ; and if we assign a numeric value to variable than we should not write the numreic value in ' ' comma it will be writen directly as $serialNumber = 1;
Now as we know echo is used to display combine these variable with text that should be written in echo like.
echo " I am $name studying in $class. My serial number is $serialNumber.";
OUTPUT
How To Combine two user define variable or more in one userdefine variable and to display it on execution?
<?php
$identity = 'James Bond';
$car = 'BMW';
$sentence = "$identity drives a $car";
echo $sentence;
?>
EXPLANATION
In this program there are two variable $identity and $car and we assign values to these two variable
and then assign to the third variable like $sentence = "$identity drives a $car";
it mean $sentense contain $identity value and $car value and the sentence become James Bond drives a BMW.
and in echo we will display $sentence.
OUTPUT
Program 3
How To Add two numbers and to display it on execution?
<?php
$a = 100;
$b = 20;
$c=$a+$b;
echo $c;
?>
EXPLANATION
In this program we take two user define variable $a and $b and assign values to these two variables .
and we take the third variable $c in which we can ass both other variable like $c=$a+$b;
and in echo we will display the variable $c in which we can add both the other variables.
OUTPUT
In same way we can substract,multiply and divide two numbers .
Program 4
How To Combine two user define in echo and to display on execution?
<?php
$txt1="Hello World!";
$txt2="What a nice day!";
echo $txt1 . " " . $txt2;
?>
EXPLANATION
In this program we take two variable $txt1 and $txt2 and assign values to it like
$txt1="Hello World!";
$txt2="What a nice day!";
in $txt1 we will assign Hello World!
in $txt2 we will assign What a nice day!
and combine these two in echo like echo $txt1 . " " . $txt2;
. " " . this is used to combine two variables
OUTPUT
Program 5
How To Count string length and display it on execution?
<?php
echo strlen("rajatsharma");
?>
EXPLANATION
strlen means string length
strlen is used to count the string length we have to write strlen in echo like
echo strlen("rajatsharma");
it will count that how many chracters are there .
OUTPUT
How To find position of chracter in string and display it on execution?
<?php
echo strpos("raj","a");
?>
EXPLANATION
strpos means stringpostion.
In this program it will show the position of chracter a in the name raj.
as we know count is start from 0 it means position of r is at 0 and a is at 1.
we have to write strpos in echo like
echo strpos("raj","a");
it means tell postion of chracter a in raj
OUTPUT
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