php - Catch different Exception types -


i have simple function check whether entity exists in bundle:

public function checkexists($bundle, $val) {     try{        $this->em->getrepository($bundle.':'.$val);     }catch (mappingexception $e){         return false;     }      return true; }

so have following cases:

input                        |    expected    |    actual 'appbundle', 'company'       |    true        |    true 'appbundle', 'nonexistant'   |    false       |    false (mappingexception caught) 'nonexistant', 'company'     |    false       |    500 (ormexception not caught) 'nonexistant', 'nonexistant' |    false       |    500 (ormexception not caught)

so see problem there different exceptions thrown, how return false either of cases of 1 part non-existant? there "general" way catch exceptions in symfony catch (exception $e) use symfony\component\config\definition\exception\exception; not catch it.

there's couple of things do: can catch exceptions firstly, can handle each 1 differently:

public function checkexists($bundle, $val) {     try{        $this->em->getrepository($bundle.':'.$val);     } catch (\exception $e){ // \exception  global scope exception         if ($e instanceof mappingexception || $e instanceof ormexception) {             return false;         }          throw $e; //rethrow if can't handle here.     }      return true; }

alternatevely have multiple catches:

 public function checkexists($bundle, $val) {     try{        $this->em->getrepository($bundle.':'.$val);     } catch (mappingexception $e){        return false;     } catch (ormexception $e) {        return false;     }  //other exceptions still unhandled.      return true; }

if you're using php 7.1 + can do:

public function checkexists($bundle, $val) {     try{        $this->em->getrepository($bundle.':'.$val);     } catch (mappingexception | ormexception $e){ //catch either mappingexception or ormexception         return false;     }  //other exceptions still unhandled.      return true; }

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