Curly Brackets

Curly brackets have different usage in PHP:

  • Delimit a block of code

  • Represents a variable delimiter inside string

  • It used to identify a single byte in a string, with an array syntax

They are also called curly braces.

<?php

for($a = 1; $a < 10; ++$i) {
     // block

     // delimit a variable to avoid confusing it with $vars
     echo "{$var}s";
}

// old syntax: it used to be the second character in the string
// This is a removed feature in PHP 8.0+
// modern syntax : use angular brackets
echo $string{1};

?>

See also PHP Curly Braces: How and When to Use it?

Related : Block, String, Square Brackets, Token