php_training_day_1

<?php

// $name = 'Don';
// echo 'My name is ' . $name;
// echo '<br />';
// echo $name . ' is my first name';

// echo '<br /><br />';

?>

<!--
<form method="GET">
    <input type="text" name="person" />
    <button type="submit">Submit</button>
</form>
-->

<?php

// $name = $_GET['person'];
// echo $name . ' is a Web Developer.';

// this is single line comment.

/* This
is
Multiline
Comment
*/


// PHP FUNCTIONS
// 1. Built-in functions / Pre determined functions
// 2. User Defined Functions

// $name = 'John Wick is a king';

// echo strlen($name) . '<br />';
// echo str_word_count($name) . '<br />';
// echo strrev($name) . '<br />';
// echo strpos($name, 'is') . '<br />';
// echo str_replace('is', 'was', $name) . '<br />';

// PHP DATA TYPES
// 1. String : $name = 'This is a string';
// 2. Integer : $integer = 55;
// 3. Float : $float 55.234234;
// 4. Boolean : True = 1 or False = 0;
// 5. Array : $array = array('One', 'Two', 'Three', '4');

// $array = array('One', 'Two', 'Three', 4);
// $array = ['One', 'Two', 'Three', 'Four'];
// echo $array[3];

// PHP OPERATORS
/*
1. Arithmetic Operators
2. Assignment Operators
3. Comparison Operators
4. Increment / Decrement Operators
5. Logical Operators
6. String Operators
7. Array Operators

1. Arithmetic Operators

+   Addition    $x + $y     Sum of $x and $y
%   Modulus     $x % $y     Reminder of $x divided by $y
**  Exponentiation  $x ** $y    Result of raising $x to the $y'th power
*/

// echo 5 ** 2;

// 2. Assignment Operators
// = : $x = $y
// +=       $x = $x + $y
// -=       $x = $x - $y
// *=       $x = $x * $y
// /=       $x = $x / $y
// %=       $x = $x % $y
// **=      $x = $x ** $y

// $x = 2;
// $y = 5;
// echo $x **= $y;

// 3. Comparison Operators
// ==       $x == $y    Returns true if $x is equal to $y
// ===      $x === $y   Returns true if $x is equal to $y and of the same type
// !=       $x != $y    Returns true if $x is not equal to $y
// <>       $x <> $y    Returns true if $x is not equal to $y
// !==      $x !== $y   Returns true if $x is not equal to $y and data type is not same
// >        $ > $y
// <
// <=
// >=

$x = 5;
$y = 3;

if ($x <> $y) {
    echo 'True';
} else {
    echo 'False';
}