PHP Exception Handling

[netcat-na-diary]

PHP Exception Handling Обработка исключений

<?php
		function checkNum($number)
		{
			if($number>1)
			{
				throw new Exception ("Value must be 1 or below");
			}
			return true;
		}
		
		checkNum(2);
	?>

Try, throw and catch

<?php
		function checkNum($number)
		{
			if($number>1)
			{
				throw new Exception ("Value must be 1 or below");
			}
			return true;
		}
		
		try {
			checkNum(2);
			echo 'If you see this, the number is 1 or below';
			}
			
		catch (Exception $e)
		{
			echo 'Message: ' .$e->getMessage();
		}
	?>

Creating a Custom Exception Class

<?php
		class customException extends Exception 
		{
			public function errorMessage()
			{
				$errorMsg = 'Error on line '.$this->getLine.' in '.$this->getFile()
				.': <b>'.$this->getMessage().'</b> is not a valid E-mail adress';
				return $errorMsg;
			}
		}
		
		$email = "someone@example...com";
		
		try 
		{
			if (filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE)
			{
				throw new customException($email);
			}
		}
		catch (customException $e)
		{
			echo $e->errorMessage();
		}
	?>

Комбинирование кастомных и встроенных исключений (отловится только первое пойманное исключение)

<?php
		class customException extends Exception 
		{
			public function errorMessage()
			{
				$errorMsg = 'Error on line '.$this->getLine.' in '.$this->getFile()
				.': <b>'.$this->getMessage().'</b> is not a valid E-mail adress';
				return $errorMsg;
			}
		}
		
		$email = "someone@example..com";
		
		try 
		{
			if (filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE)
			{
				throw new customException($email);
			}
			
			if (strpos($email, "example") !== FALSE)
			{
				throw new Exception("$email is an example email");
			}
		}
		catch (customException $e)
		{
			echo $e->errorMessage();
		}
		
		catch (Exception $e)
		{
			echo $e->getMessage();
		}
	?>