<?php

//PassArrayByCopy_test.php

$a=array("a","b","c");

function test(array $p)

{

    $len=count($p);

    for($i=0;$i<$len;$i++)

    {

        $p[$i]='Ex~' . $p[$i];

    }

    echo 'in function test:<br>';

    var_dump($p);

    echo 'leave function test.<br>';

}

var_dump($a);

test($a);

var_dump($a);

echo '<hr>';

function test2()

{

    global $a;

    $len=count($a);

    for($i=0;$i<$len;$i++)

    {

        $a[$i]='Ex~' . $a[$i];

    }

    echo 'in function test2:<br>';

    var_dump($a);

    echo 'leave function test2.<br>';

}

test2();

var_dump($a);

?>

array (size=3)

  0 => string 'a' (length=1)

  1 => string 'b' (length=1)

  2 => string 'c' (length=1)

in function test:

array (size=3)

  0 => string 'Ex~a' (length=4)

  1 => string 'Ex~b' (length=4)

  2 => string 'Ex~c' (length=4)

leave function test.

array (size=3)

  0 => string 'a' (length=1)

  1 => string 'b' (length=1)

  2 => string 'c' (length=1)

in function test2:

array (size=3)

  0 => string 'Ex~a' (length=4)

  1 => string 'Ex~b' (length=4)

  2 => string 'Ex~c' (length=4)

leave function test2.

array (size=3)

  0 => string 'Ex~a' (length=4)

  1 => string 'Ex~b' (length=4)

  2 => string 'Ex~c' (length=4)