Beginner solution A: How to define an array of file scopes in PHP

Rookie solution A: How do you define an array of file scopes in PHP?

Global $param _array = Array (' P ', ' Q ', ' CR ', ' LT ', ' Tc,m1 ', ' tc,m2 ', ' Ri,m1 ', ' ri,m2 ');

Displays syntax errors, so how do you get this array to have a scope within the file?
Or is the file scope of an array impossible to implement?
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No special definition is necessary
One but define an array
$a =array (1,2,3,4,5)

Then its scope is in this file, all functions can be accessed.
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Defined in a.php, then this array defaults to global variables, functions can be used directly outside the function, the function of domestic claims global $a, to use.
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  $num = 123;
function aa () {
Global $num;
Echo $num;
}
AA ();
?>

------to solve the idea----------------------

$param _array = Array (' P ', ' Q ', ' CR ', ' LT ', ' Tc,m1 ', ' tc,m2 ', ' Ri,m1 ', ' ri,m2 ');

function local () {
Global $param _array;
Print_r ($param _array);
}

Class localclass{

function Run () {
Global $param _array;
Print_r ($param _array);
}
}

Print_r ($param _array);
Local ();
$obj = new Localclass ();
$obj->run ();

