Splat Operator in PHP

The splat operator was introduced in PHP starting with version 5.6, so, to can use it and test the examples from this page, you need PHP 5.6+.
The Splat Operator is represented by three dots (...), and can be used to define functions that can be called with a variable number of arguments.

1. This operator can be used when the function is called, before an array argument.

<?php
function add($a, $b, $c) {
  return $a + $b + $c;
}

$arguments = [8, 9];     // array with values for $b and $c parameters
echo add(5, ...$arguments);      // 22
?>

2. The splat operator can also be used when the function is defined, before a parameter that represents an array of arguments.

<?php
// $params is an array containing the remaining arguments
function add($opt = 0, ...$params) {
  $sum = $opt + array_sum($params);
  echo '$opt is '. $opt .' / $params contains '. count($params .' arguments / $sum = '. $sum;    
}

add();             // $opt is 0 / $params contains 0 arguments / $sum = 0
add(1);            // $opt is 1 / $params contains 0 arguments / $sum = 1
add(5, 6);         // $opt is 5 / $params contains 1 arguments / $sum = 11
add(5, 6, 7);      // $opt is 5 / $params contains 2 arguments / $sum = 18
add(5, 6, 7, 8);   // $opt is 5 / $params contains 3 arguments / $sum = 26
?>

<<-Calling Function and Class .. -- Add data from form ..->>

Daily Test with Code Example

HTML

CSS

JavaScript

PHP-MySQL

Which tag is a block element?

<div>Web Programming and Development</div>

Which CSS code displays the text underlined?

font-style: italic; text-decoration: underline; font-weight: 500;

h2 {
  text-decoration: underline;
}

Click on the JavaScript function that can access other function after a specified time.

insertBefore() setTimeout() querySelector()

function someFunction() { alert("CoursesWeb.net"); }
setTimeout("someFunction()", 2000);

Click on the instruction that returns the number of items of a multidimensional array in PHP.

count($array) count($array, 1) strlen()

$food =["fruits" =>["banana", "apple"), "veggie" =>["collard", "pea"));
$nr_food = count($food, 1);
echo $nr_food;       // 6

Last accessed pages

Add Tag to Selected Text in textarea with JavaScript ⁽¹⁶²⁶⁾
JSON syntax in JavaScript ⁽⁴¹⁹⁷⁾
Recursive function to create Multi-Level Menu in JavaScript ⁽³²⁵⁵⁾
innerHTML and outerHTML to Get and Replace HTML content ^(20934)
Ajax-PHP Chat Script ^(39937)

Popular pages this month

Making DIV Contents Scroll Horizontally, with multiple Div`s inside ⁽²⁴⁹⁶⁾
Contact page - CoursesWeb ⁽²³⁹²⁾
Tabs effect with CSS ⁽²³⁹¹⁾
Insert, Select and Update NULL value in MySQL ⁽¹¹¹⁷⁾
PHP getElementById and getElementsByTagName ⁽⁹⁸⁹⁾