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Showing posts with label PHP Examples. Show all posts

PHP Program how to print string and variable both using print

php source-

<!DOCTYPE html>
<html>
<body>

<?php
$txt1 = "Learn PHP";
$txt2 = "W3Schools.com";
$x = 5;
$y = 4;

print "<h2>" . $txt1 . "</h2>";
print "Study PHP at " . $txt2 . "<br>";
print $x + $y;
?>

</body>
</html>

output-

Learn PHP

Study PHP at W3Schools.com
9

PHP Program how to use the print

php source

<!DOCTYPE html>
<html>
<body>

<?php
print "<h2>PHP is Fun!</h2>";
print "Hello world!<br>";
print "I'm about to learn PHP!";
?>

</body>
</html>

output

PHP is Fun!

Hello world!
I'm about to learn PHP!

PHP program to explain the use of echo

php source-:

<!DOCTYPE html>
<html>
<body>

<?php
echo "<h2>PHP is Fun!</h2>";
echo "Hello world!<br>";
echo "I'm about to learn PHP!<br>";
echo "This ", "string ", "was ", "made ", "with multiple parameters.";
?>

</body>
</html>

output-:

PHP is Fun!

Hello world!
I'm about to learn PHP!
This string was made with multiple parameters.

PHP Program how to use static variable example

php source ( why we use static keyword )

<!DOCTYPE html>
<html>
<body>

<?php
function myTest() {
     static $x = 0;
     echo $x;
     $x++;
}

myTest();
echo "<br>";
myTest();
echo "<br>";
myTest();
?>

</body>
</html>

Output

0
1
2

PHP program how to use $GLOBALS[] array example

php source

<!DOCTYPE html>
<html>
<body>

<?php
$x = 5;
$y = 10;

function myTest() {
$GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y'];
}

myTest();
echo $y;
?>

</body>
</html>

output

15

PHP Program how to use global keyword to access global variable

php source ( how to use global keyword in php )

<!DOCTYPE html>
<html>
<body>

<?php
$x = 5;
$y = 10;

function myTest() {
global $x, $y;
$y = $x + $y;
}

myTest(); // run function
echo $y; // output the new value for variable $y
?>

</body>
</html>

output

15

PHP Local scope of a variable ( variable inside a function )

php source

<!DOCTYPE html>
<html>
<body>

<?php
function myTest() {
$x = 5; // local scope
echo "<p>Variable x inside function is: $x</p>";
}
myTest();

// using x outside the function will generate an error
echo "<p>Variable x outside function is: $x</p>";
?>

</body>
</html>

Output

Variable x inside function is: 5
Variable x outside function is:

PHP globle scope of variable example program ( variable outside a function )

php source

<!DOCTYPE html>
<html>
<body>

<?php
$x = 5; // global scope

function myTest() {
// using x inside this function will generate an error
echo "<p>Variable x inside function is: $x</p>";
}
myTest();

echo "<p>Variable x outside function is: $x</p>";
?>

</body>
</html>

Output

Variable x inside function is:
Variable x outside function is: 5

PHP Types of variables

php Source

<!DOCTYPE html>
<html>
<body>

<?php
$txt = "Hello world!";
$x = 5;
$y = 10.5;

echo $txt;
echo "<br>";
echo $x;
echo "<br>";
echo $y;
?>

</body>
</html>

Output

Hello world!
5
10.5

PHP Variable are not case sensitive

PHP Variable are not case sensitive -

php Source -

<!DOCTYPE html>
<html>
<body>

<?php
$color = "red";
echo "My car is " . $color . "<br>";
echo "My house is " . $COLOR . "<br>";
echo "My boat is " . $coLOR . "<br>";
?>

</body>
</html>

Output

My car is red
My house is
My boat is

PHP Functions, Keywords are not case-sensitive

php Source

<!DOCTYPE html>
<html>
<body>

<?php
ECHO "Hello World!<br>";
echo "Hello World!<br>";
EcHo "Hello World!<br>";
?>

</body>
</html>

Output

Hello World!
Hello World!
Hello World!

How to use comment in PHP

Comment_example.php

<!DOCTYPE html>
<html>
<body>

<?php
// This is a single-line comment

# This is also a single-line comment

/*
This is a multiple-lines comment block
that spans over multiple
lines
*/

// You can also use comments to leave out parts of a code line
$x = 5 /* + 15 */ + 5;
echo $x;
?>

</body>
</html>

Result
10

PHP Program to write a simple string

PHP Source - :

<!DOCTYPE html>
<html>
<body>

<h1>My first PHP page</h1>

<?php
echo "Hello World!";
?>

</body>
</html>

Output -:

My first PHP page

Hello World!

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Topics

Android
Android Animation
Android Examples
Android Fragments
C Programming
C Programs
CSS
HTML
iPhone
Javascript
PHP Examples
Userinterface
WebApps
Whatsapp