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Kiran Parajuli
Kiran Parajuli

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Splat Operator in PHP

#php #operator #magic

...$str is called a splat operator in PHP (other languages, including Ruby.)

This feature allows you to capture a variable number of arguments to a function, combined with "normal" arguments passed in if you like. It's easiest to see with an example:

<?php function concatenate($transform, ...$strings) { $string = ''; foreach($strings as $piece) { $string .= $piece; } return($transform($string)); } echo concatenate("strtoupper", "I'm ", 20 + 2, " years", " old.");
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Output

I'M 22 YEARS OLD.
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Latest feature

After PHP 5.5.x, arrays and traversable objects can be unpacked into argument lists when calling functions by using the ... operator.

<?php function add($a, $b, $c) { return $a + $b + $c; } $operators = [2, 3]; echo add(1, ...$operators); ?>
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Output

6
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That's cool. 😎

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