What is the use of lambda functions in PHP?
The lambda function is used to first store data into a variable and then to pass it as arguments for the usage in other methods or functions.
example:
<?php
$input = array(2, 5, 10);
$output = array_filter($input, function ($x) { return $x > 2; });
?>
Lambda function definition here:
<?php
function ($x) { return $x > 2; });
?>
This is used further to store data into a variable, and then you can use it when required without the requirement of defining it again.