Using references and Global in PHP

In PHP, the arguments in the function are passed for values such as:

The output result is 12.

If you want to become a reference pass, then only need to change the function body, using the reference symbol &

function f (&$a) {$a + = 10;}

Another way is to change $ A into a global variable in the function body using the Global keyword:

function f ($a) {global $a; $a + = 10;}

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The above describes the use of reference and Global in PHP, including aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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