Function object: Difference between revisions

Revision as of 16:11, 9 April 2019

Revision as of 08:04, 15 April 2019

Line 566:

$a = array(3, 1, 4);

usort($a, function ($x, $y) { return $x - $y; });

</source>

[[PHP]] 5.3+, supports also lambda functions and closures.

<source lang=PHP>

function Accumulator( $start ) {

$current = $start;

return function( $x ) use( &$current ) {

return $current += $x;

};

}

</source>

An example of this in use:

<source lang=PHP>

$a = Accumulator(4);

$x = $a(5);

echo "x=$x<br/>"; // x=9

$x = $a(2);

echo "x=$x<br/>"; // x=11

</source>