Php Splat Operator

php splat operator – The splat operator is used as three dots before variable (…). PHP 5.6 and the Splat Operator and It’s Variadic Functions. str is called a splat operator in PHP

Contents

The splat operator can be used to unpack parameters to functions or to combine variables into an array.

you can use splat operator (…) to create simpler variadic functions (functions that take an undefined number of arguments).

This includes names like:

Ellipsis
Spread operator
Splat operator
Unpacking operator
Packing operator
Three dots operator

PHP – Splat Operator … Variadic functions have been around since before 5.6

The Splat Operator In PHP

PHP – Splat Operator
Three dots operator

function adder(...$numbers)
{
$sum = 0;

foreach ($numbers as $number)
{
$sum += $number;
}

return $sum;
}

// Both of these work.
adder(1,2);
adder(1,2,3,4,5,6,7);

Don’t Miss : PHP ternary operator shorthand

Only the last parameter can use the splat operator,

...

function adder(ProductType1 ...$adds, ProductType2 ...$subs)
{
$total = 0;

foreach ($adds as $add)
{
$total += $add->getAccount();;
}

foreach ($subs as $sub)
{
$total -= $sub->getAccount();
}

return $total;
}

Argument Unpacking

function adder($arg1, $arg2)
{
return $arg1 + $arg2;
}

$args = array(1,2);
print adder(...$args); // results 3

Array of Objects Validation

class AccountPackage
{
private $m_accounts;

public function __construct(array $accounts)
{
$this->m_accounts = (function (Account ...$accounts) {
return $accounts;
})(...$accounts);
}
}

Don’t Miss : Shorthand comparisons in PHP

php splat

php splat operator

foo(...$args);

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php splat operator – The Splat Operator In PHP