how do I make the text in sign

Can you tell me a way to make the text on the sign.
Example:
if we write {TEXT} will be the words "hello"

 

Spoiler

PHP:

public function onSignChange(SignChangeEvent $e){
 $tile = $e->getLine();
if($tile == "Text"){
$tile->setText("Example");
}
}

 

$level->getTile(new Vector3($x, $y, $z))->setText($line1, $line2, $line3, $line4);

 

Nah he want that if he type {text} on a Sign that the {text} will be changed to Hello

 

Use $event->getLine()

 

"if he type {text} on a Sign that the {text} will be changed to Hello" - is Example