PHP Global Array not working

Question

I'm creating an array outside of my PHP function and calling global inside the function but my function fails to see the array. The function is also called recursively. Any idea what I'm doing wrong?

    $node_types = array( 1 => 'testproject',
                         2 => 'testsuite',
                         3 => 'testcase');


function get_subtree($node_id,&$node_list) {

    global $node_types;

    foreach ($node_types as $key)  { 
        echo("node_types: " . $key . "<BR>"); 
    }

    ....

    get_subtree($node_id,$node_list);
}

My error:

Notice: Undefined variable: node_types in ...

Thanks

Related: [Declaring a global array](https://stackoverflow.com/questions/12876222/declaring-a-global-array) — ggorlen, Apr 11 '23 at 02:41

score 5 · Answer 1 · answered Apr 11 '12 at 14:10

5

Put

global $node_types;

above the array definition as well as inside the function.

answered Apr 11 '12 at 14:10

Matt Gibson

14,616
7
47
79

Darren Burgess · Accepted Answer · 2012-04-11T14:35:35.060

1

Declaring an array within a function will create a new array each time the function is used and the scope of the array is only as long as the function. The Global array must be declared outside of functions. So in this case should be placed before at he top of the example.

edited Apr 11 '12 at 14:35

answered Apr 11 '12 at 14:23

Darren Burgess

4,200
6
27
43

score 0 · Answer 3 · answered Apr 11 '12 at 14:06

0

Don't use global $node_types inside your function. It will create new variable, so your function will use the null variable instead of the one you have globally.

answered Apr 11 '12 at 14:06

GoSmash

1,096
1
11
38

score -5 · Answer 4 · answered Feb 23 '16 at 14:04

-5

My guess, you placed the global definition after the function call.

answered Feb 23 '16 at 14:04

Slawek Kotynski

1
1

PHP Global Array not working

4 Answers4

Linked