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POphp trait using another trait
 

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  1. POphp trait using another trait
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    <p>I have a trait which is using another trait, and now I'm getting errors about functions that don't exist in classes. I have simplified the code:</p> <p>settings.php:</p> <pre><code>&lt;?php trait settings{ protected function getSetting($type, $setting){ // read setting from config.ini try{ $configFile=dirname(__FILE__)."/../config.ini"; if(!file_exists($configFile)||!is_file($configFile))throw new Exception("Config file was not found. "); $configContents=parse_ini_file($configFile,true); if(is_array($configContents)&amp;&amp;array_key_exists($type,$configContents)&amp;&amp;is_array($configContents[$type])&amp;&amp;array_key_exists($setting,$configContents[$type]))return $configContents[$type][$setting]; else throw new Exception("Setting ".$setting." could not be found in ".$type."."); } catch(Exception $e){throw new Exception($e-&gt;getMessage());} } } ?&gt; </code></pre> <p>database.php</p> <pre><code>&lt;?php trait database{ use settings,session; private $pdo; protected function connect(){ // connect to database try{ $this-&gt;pdo=new PDO("mysql:host=".$this-&gt;getSetting("db","host").";dbname=".$this-&gt;getSetting("db","database"),$this-&gt;getSetting("db","user"),$this-&gt;getSetting("db","password")); $this-&gt;init(); } catch(PDOException $e){throw new Exception($e-&gt;getMessage());} } } ?&gt; </code></pre> <p>users.php</p> <pre><code>&lt;?php class users{ use database; public function __construct(){ try{ $this-&gt;connect(); } catch(Exception $e){throw new Exception($e-&gt;getMessage());} } public function __destruct(){ unset($this); } public function isAdmin(){ try{ if($this-&gt;loginStatus()===true){ } else return false; } catch(Exception $e){throw new Exception($e-&gt;getMessage());} } public function loginStatus(){ if(!$this-&gt;getSession("tysus")||!$this-&gt;getSession("tyspw"))return false;// user is not logged in because we couldn't find session with username and/or password if(!$this-&gt;userExists($this-&gt;getSession("tysus"),$this-&gt;getSession("tyspw")))return false;// user is unknown to database return true;// other checks failed, user must be logged in } } ?&gt; </code></pre> <p>And now I'm getting this error:</p> <blockquote> <p>Fatal error: Call to undefined method users::readSetting() in /home/deb2371/domains/nonamenohistory.com/public_html/include/classes/class.database.php on line 18</p> </blockquote> <p>What I thought would happen was something like this: Class users uses trait database and trait database would use trait settings and trait session.</p> <p>If that was the case, I wouldn't get any errors, but unfortunately this isn't the case.</p> <p>Does someone know how to fix this problem?</p>
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    1. PTQuestion
    1. USFunk Forty Niner
    1. USTheatreOfSouls
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    1. PO
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    1. COWhy should I not use traits? Please explain.
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      1. USTheatreOfSouls
    2. COBecause, besides making huge mess regarding violations of SOLID principles, they also are actually implemented (under the hood) as interpreter-assisted copy-paste.
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      1. POphp trait using another trait
      1. UStereško
    3. COI don't understand why that's the case.
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      1. USTheatreOfSouls
 

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