I have 2 php files.
index.php:
<?php
$counter = 0;
require_once('temp.php');
temp();
echo $counter;
?>
temp.php:
<?php
function temp() {
tempHelper();
}
function tempHelper() {
$counter++;
}
?>
I want to print 1 not 0. I tried to set $counter as global variable without success.
What can I do?
Your tempHelper function is incrementing a local $counter variable, not the global one. You have to either pass the variable in by reference through both functions, or use the global variable:
function tempHelper() {
global $counter;
$counter++;
}
Note that dependence on global variables likely indicates a design flaw in your application.
I would advise against using global variables. Using a class for your counter would probably be better.
class Counter {
public $counter;
public function __construct($initial=0) {
$this->counter = $initial;
}
public function increment() {
$this->counter++;
}
}
Or just use a variable without a function. Your function seems redundant, since it would be just as easy to type $counter++ than it would the function name.
I suppose this should work:
<?php
$counter = 0;
function temp() {
// global $counter; [edited, no need for that line]
tempHelper();
}
function tempHelper() {
global $counter;
$counter++;
}
temp();
echo $counter;
?>
Or you can pass the variable as an argument or return new value from that function.
More info at http://www.simplemachines.org/community/index.php?topic=1602.0
global $counter inside temp, which doesn't use it.