PHP - array_push() expects parameter 1 to be array, null given

Comments

• Corey Member

  August 2012

  Why not just use $arrMessages[] = $strMsg;

  Thanked by 1joepie91
• telephone Member

  August 2012 edited August 2012

  Think of a function as a sandbox. You need to define the input variables you're going to be using, or as you mentioned use global (which is not advised!).

  $arrMessages = array();
  
  function AddMessage($array, $msg)
  {
      return array_push($array, $msg);
  }
  
  Or you can typecast:
  
  function AddMessage(array $array, $msg)
  {
      return array_push($array, $msg);
  }
  
  Or as Corey mentioned:
  
  $arrMessages[] = $strMsg;
• NickM Member

  August 2012

  @Corey said: Why not just use $arrMessages[] = $strMsg;

  Agreed. Even the PHP docs say to use this method instead of array_push.
• Corey Member

  August 2012

  @NickM said: Agreed. Even the PHP docs say to use this method instead of array_push.

  From PHP Docs ->

  Note: If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function. 
  

  Thanked by 1joepie91
• winston Member

  August 2012

  changed it to $arrMessages[] = $strMsg;

  thanks!