Question

How to use try, throw and catch in PHP

Answer 1

/*
throw new Exception($error_message);
*/

function checkZero($n) {
  if($n == 0) {
    throw new Exception("Value must be > 0");
  }
  return true;
}

try {
  checkZero(0);
  echo 'If you see this line, the exception is not thrown';
}

catch(Exception $e) {
  echo 'Error Message: ' .$e->getMessage();
}
        
/*
run:

Error Message: Value must be > 0 
  
*/

 

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Answer 2

/*
throw new Exception($error_message);
*/

function checkZero($n) {
  if($n == 0) {
    throw new Exception("Value must be > 0");
  }
  return true;
}

try {
  checkZero(1);
  echo 'If you see this line, the exception is not thrown';
}

catch(Exception $e) {
  echo 'Error Message: ' .$e->getMessage();
}
        
/*
run:

If you see this line, the exception is not thrown 
  
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile

Answer 3

/*
throw new Exception($error_message);
*/

try {
    throw new Exception("error message");
    echo 'You will not see this line';
} 
catch (Exception $e) {
    echo 'Error: ',  $e->getMessage();
}
        
/*
run:

Error: error message 
  
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile