trying to run function just once

I have a function that needs to run just once. I thought that setting $var=1 and using if (isset($var)){} would work but it doesn't. How can I run a function just one time in CI3?

proof that an old dog can learn new tricks

use flash data

This should work for you, not tested.

PHP Code:

protected static $runOnce = true;

if ($runOnce === true)
{
    // run your code
}
else
{
    static::$runOnce = false;
} 


What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

This should work for you, not tested.

PHP Code:

protected static $runOnce = true;

if ($runOnce === true)
{
    // run your code
}
else
{
    static::$runOnce = false;
} 


Thanks. Where does protected static $runOnce = true; go? Can I put this in _init()?

proof that an old dog can learn new tricks

@richb201 ,

I have not used static before and decided to give it a try... discovered it ONLY works on Class Methods(...).

The following KLUDGE should work which I have tried in:

CI4 -> app/Common.php -> function fred(...)

Code:

//==================================================
function fred($val='Nothing set???', mixed $title='NO TITLE')
: string
{
  if( defined('CALL_ONCE_ONLY') ) :
    echo '<br> PREMATURE FUNCTION RETURN AND NOT USED';
    return '';
  endif;
  define('CALL_ONCE_ONLY', 'pretty please');


  $results = print_r($val, TRUE);

  echo $tmp = <<< ____EOT
    <div> <br> </div>
      <dl class="w88 mga fss bgl bd1 p42" >
        <dt> <b> $title </b> ==> </dt>
        <dd>
          <pre class="tal wrp bga">
            <b> $title </b> ==>
            <br>            
            $results
          </pre>
        </dd>  
      </dl>  
____EOT;

  return $result=(string) '';
}//

If you are not inside a class context, you can use static variables instead.

PHP Code:

static $hasRun;

if ($hasRun !== true)
{
    $hasRun = true;

    // run your function here
} 


Its amazing topic


function foo()
{
static $foo_called = false;
if (!$foo_called) {
$foo_called = true;
// etc.
}
}

Enlightenment  Is  Freedom

If you are not inside a class context, you can use static variables instead.

PHP Code:

static $hasRun;

if ($hasRun !== true)
{
    $hasRun = true;

    // run your function here
}

I tried this. I tried placing $hasRun above class Configure extends CI_Controller but I get undefined variable. Then I placed it between 
class Configure extends CI_Controller
{
    static $hasRun;    <<<<<<<<here
    public function __construct()

And i still get undefined variable.
I put the if ($hasRun !== true) in the __construct() 


---

Its amazing topic


function foo()
{
    static $foo_called = false;
    if (!$foo_called) {
        $foo_called = true;
        // etc.
    }
}

The problem is that foo runs each time.

---

@richb201 ,

I have not used static before and decided to give it a try... discovered it ONLY works on Class Methods(...).

The following KLUDGE should work which I have tried in:

CI4 -> app/Common.php -> function fred(...)

Code:

//==================================================
function fred($val='Nothing set???', mixed $title='NO TITLE')
: string
{
  if( defined('CALL_ONCE_ONLY') ) :
    echo '<br> PREMATURE FUNCTION RETURN AND NOT USED';
    return '';
  endif;
  define('CALL_ONCE_ONLY', 'pretty please');


  $results = print_r($val, TRUE);

  echo $tmp = <<< ____EOT
    <div> <br> </div>
      <dl class="w88 mga fss bgl bd1 p42" >
        <dt> <b> $title </b> ==> </dt>
        <dd>
          <pre class="tal wrp bga">
            <b> $title </b> ==>
            <br>           
            $results
          </pre>
        </dd> 
      </dl> 
____EOT;

  return $result=(string) '';
}//

Following your lead I stuck this in the bottom of _init()
if(defined('RUNONCE')) {
}
else {
    $this->get_from_locker();  //bring down this guy's images
    define ('RUNONCE','YES');
}

Unfortunately it keeps running get_from_locker() each time. 

proof that an old dog can learn new tricks

Once per what? Once per day? Once per page load? What are you trying to accomplish? If you don't need to run it more than one time, in which context is it called repeatedly?

The script I supplied is PHP.

Where or what is _init()