PHP Quote &

PHP References &

PHP refers to the meaning of &

?

Such as:

function &test ()
{
Static $b =0;//declaration of a statically variable
$b = $b +1;
Echo $b;
return $b;
}


? $a =&test ();? & Represents a reference function this way, the $b and $ A returned by test () point to the same address. It can also be said that $ A is $b. Modify any one, and the other will change as well. Output here 1

? $a = 5;? Here $a=5, just $b also equals 5. Because the above $a=&test () is the address reference.
? Test (); Because this will output 6.

?

Example 2.

$a = 123;

$b =& $a;

$b = 321;

echo $a;

And the above example is the same, output 321.

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