CODEWITHSUNDEEP
phparraysfunctionglobal
omar
omar

Reputation: 63

make array keys available defined in one function available to second function

Can't seem to make this work.

I want to make the array below available to a second function but it always comes up empty

The main code is this: 

function GenerateSitemap($params = array()) {          

$array = extract(shortcode_atts(array(                         
'title' => 'Site map',                         
'id'    => 'sitemap',                         
'depth' => 2                         
), $params));                                  

global $array; 

}  


function secondfunction()

{
global $array; 

print $title;

// this function throws an error and can't access the $title key from the first function
}

GenerateSitemap()

secondfunction()

I'd like to use the title, id or depth KEYS inside a second function. They just come up empty and throw an error

Upvotes: 1

Views: 407

Answers (2)

MrWhite
MrWhite

Reputation: 45829

You need to declare the variable as global before you use it inside the function, otherwise it will implicitly create a local variable.

function myFunc() {
    global $myVar;
    $myVar = 'Hello World';
}

myFunc();
print_r($myVar);    // 'Hello World'

You don't actually have to declare it initially in the globalscope, you will not get a notice/warning/error, although it is obviously good practice to do so. (Although if good practice is the goal then you probably shouldn't be using global variables to begin with.)

Upvotes: 0

dfmiller
dfmiller

Reputation: 1213

"The scope of a variable is the context within which it is defined."

https://www.php.net/language.variables.scope.php

You need to define the variable (at least initially) outside the function:

   $array = array();

    function GenerateSitemap($params = array()) {          
       global $array; 
       $array = extract(shortcode_atts(array(                         
          'title' => 'Site map',                         
         'id'    => 'sitemap',                         
         'depth' => 2                         
      ), $params));                                  
   }  

   function SecondFunction() {          
       global $array; 
       ...
   }

Upvotes: 1

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