Detailed explanation of usage examples returned by PHP reference

This article mainly introduces the usage of PHP reference return, and analyzes the reference usage skills for function parameters and functions in the form of examples. It has certain reference value. Friends in need can refer to

Example 1 :

<?php
$a = 1;
function b(&$c)
{
　　$c++;
　　return $c;
}
$d=b($a);
$d++;
echo($a);
?>

Output: 2

Example 2:

<?php
$a = 1;
function &b(&$c)
{
　　$c++;
　　return $c;
}
$d=&b($a);
$d++;
echo($a);
?>

Output: 3

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