Basic PHP for WordPress Batch 4

index.php

<?php

$abc = "hello";

echo $abc;

function isGreaterThanZero( $a ) {
    if ( $a > 0 ) {
        echo "TRUE";
    } else {
        echo "FALSE";
    }
}

echo "<br>world<br>";

echo isGreaterThanZero( 4564564646 );
echo "<br>";
echo isGreaterThanZero( -4564564646 );
echo "<br>";

$myArray = array( 1, 2, 3, 4, "Hello", "World" );

for ( $i = 0; $i <= 10; $i = $i + 2 ) {
    echo $i;
}

echo "<br>";

$i = 0;

while( $i <= 10 ) {
    echo $i;

    $i = $i + 2;
}

foreach ( $myArray as $item ) {
    echo "<br>";
    echo $item;
}

inheritance.php

<?php

trait Def {
    public $name = "weDevs Academy";

    public function __construct() {
        echo $this->name;
        // echo $this->something3;
    }
}

class Xyz {

    use Def;

    public function get_parents_data() {
        return $this->name;
    }

}

$new_xyz = new Xyz();

// echo $new_xyz->get_parents_data();

oop.php

<?php

require_once __DIR__ . '/inheritance.php';

class Abc {

    use Def;

    public $something = "This is string";
    protected $something2 = "This is protected";
    private $something3 = "This is private";
    private static $something4 = "This is private static property";

    public function get_something() {
        return self::get_private();
        // return $this->something;
        // return $this->something;
    }

    public static function get_private() {
        echo self::$something4;
        // echo "This from static";
    }
}

$new_abc = new Abc();

// $new_abc->get_something();

// echo Abc::get_private();