Php Code – Codemeets– 02

PHP Code Lesson 2: Expanding Your PHP Knowledge

Welcome to php code Lesson 2 of our PHP tutorial! Today, we will explore essential PHP concepts, including HTML integration, Variables, Strings, Numbers, and Operations. By the end of this lesson, you’ll gain a deeper understanding of how PHP works in web development.

Use HTML For PHP

You can see below html tag use in your php file.

<?php
echo "<h1>Micke</h1>";
echo "<hr>";
echo "<h1>Jhone</h1>"
?>

Use Variable

Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descriptive name, so our programs can be understood more clearly by the reader and ourselves. It is helpful to think of variables as containers that hold information. Their sole purpose is to label and store data in memory. This data can then be used throughout your program.launchschool.com

Now you know what is variable, let’s use it php code.

<?php
$charname ="Jhone";
$charage = '18';
echo "my name is = $charname";
echo "<br>";
echo "my age = $charage";
?>

Working with Strings in PHP

A string is a sequence of characters enclosed in single (”) or double (“”) quotes. PHP provides various built-in functions to manipulate and work with strings efficiently.

<?php
$pharase = "Hello World";

Code	Output
echo strtoupper ($pharase);	HELLO WORLD
echo strtolower ($pharase);	hello world
echo strlen ($pharase);	10
echo pharase[1];	e
echo str_replace("Hello","Hay",$pharase);	Hay World
echo substr ($pharase,6);	ld
echo substr ($pharase,4,7);	owor

Syntax

Working with Numbers in PHP

Numbers are fundamental in every programming language, and PHP provides various functions to handle and manipulate them. PHP supports both integers (whole numbers) and floating-point numbers (decimals).

<?php
echo 5;    //5
echo 5 + 9;   //14
?>

<?php
$num = 10;
$num ++;
echo $num;  //11

Mathematical Operations in PHP

Mathematics involves a variety of operations such as finding maximum values, square roots, and flooring numbers. PHP provides several built-in functions to perform these operations efficiently. Let’s dive deeper into these mathematical operations.

Name	Syntax	Output
Power	echo pow(2,4);	16
Square root	echo sqrt(144);	12
Max Number	echo max(10,20,30);	30
Min Number	echo min (10,20,30);	10
Round	echo round (3.2);	3
NOT	echo abs(-100);	100
Max Round	echo ceil(3.2);	4
Min Round	echo floor(3.8);	3

Operations

Special Example for Lesson 02

Q1

• • First get square root in x.

• • y is max round number.

• • z is positive number.

• • R is X+Z/Y.

• • (X=144, Y=2.2, Z=-33)

• • Find R?

<?php
$x = 144;
$y = 2.2;
$z = -33;
$x1 = sqrt($x);
$y1 = ceil($y);
$z1 = abs($z);
$R1 = $x1 + $z1;
$R = $R1 / $y1;
echo "R";
?>
<?php
$x = 144;
$y = 2.2;
$z = -33;
$x1 = sqrt($x);
$y1 = ceil($y);
$z1 = abs($z);
$R1 = $x1 + $z1;
$R = $R1 / $y1;
echo "R = ";
echo $R;
?>

Thank for all!

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See you Next php Lesson Soon!