What are some considerations for choosing a placeholder notation in PHP templates for optimal performance and user-friendliness?

When choosing a placeholder notation in PHP templates for optimal performance and user-friendliness, it is important to consider readability, ease of use, and potential conflicts with existing PHP syntax. One common approach is to use curly braces with a descriptive variable name enclosed within them, as this is easily recognizable and less likely to clash with other PHP code.

// Example of using curly braces with a descriptive variable name as a placeholder notation
$template = "Hello, {name}! Welcome to our website.";
$name = "John Doe";
echo str_replace("{name}", $name, $template);