php function with 2 parameters code example

Example 1: function passing multiple arguments using 3 dots php

function concatenate($transform, ...$strings) {
    $string = '';
    foreach($strings as $piece) {
        $string .= $piece;
    }
    return($transform($string));
}

echo concatenate("strtoupper", "I'd ", "like ", 4 + 2, " apples");
// This would print:
// I'D LIKE 6 APPLES

Example 2: variable args php

function some_function(...$args): void {
  $val1 = $args[0];
  // Access as normal index array
}