如何将值传递给第二个参数，其中第一个参数作为函数[duplicate]中的默认参数

Question

This question already has an answer here:

• How to set optional parameter to default without passing it? 4 answers

Actually i want to pass a value to the second argument in a function , where the first argument is as default argument.

<?php
function a($a=5,$b) {
echo "a = ".$a."<br>";
echo "b = ".$b;
} 
a(,3);


?>

the first argument should remain default.

</div>

Answer 1

The best solution for this case is to revert parameters:

function a($b,$a=5) {}

and just call

a(3);