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class Locale {
private string $languageCode;
private string $countryCode;

public function __construct ( string $languageCode, string $countryCode )
{
$this->setLanguageCode($languageCode);
$this->setCountryCode($countryCode);
}

public function getLanguageCode(): string {
return $this->languageCode;
}

public function setLanguageCode( string $languageCode ): void {
$this->languageCode = $languageCode;
}

public function getCountryCode(): string {
return $this->countryCode;
}

public function setCountryCode( string $countryCode ): void {
$this->countryCode = strtoupper($countryCode);
}

public function setCombinedCode( string $combinedCode ): void {
[ $languageCode, $countryCode ] = explode( '_', $combinedCode, 2 );
$this->setLanguageCode($languageCode);
$this->setCountryCode($countryCode);
}

public function getCombinedCode(): string {
return \sprintf( "%s_%s", $this->languageCode, $this->countryCode );
}
}

$brazilianPortuguese = new Locale( 'pt', 'br' );

var_dump( $brazilianPortuguese->getCountryCode() ); // BR

var_dump( $brazilianPortuguese->getCombinedCode() ); // pt_BR

class PhpVersion {
private string $version = '8.3' ;

public function getVersion(): string {
return $this->version;
}

public function increment(): void {
[ $major, $minor ] = explode( '.', $this->version );
$minor++;
$this->version = "{$major}.{$minor}" ;
}
}

class PhpVersion {
/**
* @deprecated 8.3 use PhpVersion::getVersion() instead
*/
public function getPhpVersion(): string {
return $this->getVersion();
}

public function getVersion(): string {
return '8.3';
}
}

$phpVersion = new PhpVersion();
// No indication that the method is deprecated.
echo $phpVersion->getPhpVersion();

$dom = new DOMDocument();
$dom->loadHTML(
<<<'HTML'
<main>
<article>PHP 8.4 is a feature-rich release!</article>
<article class="featured">PHP 8.4 adds new DOM classes that are spec-compliant, keeping the old ones for compatibility.</article>
</main>
HTML,
LIBXML_NOERROR,
);

$xpath = new DOMXPath($dom);

$node = $xpath->query('.//main/article[not(following-sibling::*)]')[0];

$classes = explode(" ", $node->className); // Simplified

var_dump(in_array("featured", $classes)); // bool(true)

$num1 = '0.12345';
$num2 = '2';
$result = bcadd($num1, $num2, 5);

echo $result; // '2.12345'
var_dump(bccomp($num1, $num2) > 0); // false

$animal = null;
foreach ( [ 'dog', 'cat', 'cow', 'duck', 'goose' ] as $value ) {
if ( str_starts_with($value, 'c') ) {
$animal = $value;
break;
}
}

var_dump($animal); // string(3) "cat"

$connection = new PDO(
'sqlite:foo.db',
$username,
$password,
); // object(PDO)

$connection->sqliteCreateFunction(
'prepend_php',
static fn ($string) => "PHP {$string}",
);

$connection->query('SELECT prepend_php(version) FROM php');

class PhpVersion {
public function getVersion(): string {
return 'PHP 8.4';
}
}

var_dump(( new PhpVersion())->getVersion());