Using Custom Exceptions to Handle Different Circumstances : Exception « Statement « PHP

1. PHP
2. Statement
3. Exception

Using Custom Exceptions to Handle Different Circumstances

 
<?php

class MyException extends Exception {
  public function summarize() {
    $ret = "<pre>\n";
    $ret .=  "msg: ".$this->getMessage()."\n"
         ."code: ".$this->getCode()."\n"
         ."line: ".$this->getLine()."\n"
         ."file: ".$this->getFile()."\n";
    $ret .= "</pre>\n";
    return $ret;
  }
}

class FileNotFoundException extends MyException { }

class FileOpenException extends MyException { }

class Reader {
  function getContents( $file ) {
      throw new FileNotFoundException( "could not find '$file'" );
      throw new FileOpenException( "unable to open '$file'" );
  }
}

$reader = new Reader();
try {
  print $reader->getContents( "blah.txt" );
} catch ( FileNotFoundException $e ) {
  print $e->summarize();
} catch ( FileOpenException $e ) {
  print $e->summarize();
} catch ( Exception $e ) {
  die("unknown error");
}
?>
  
  

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