PHP ErrorException (PHP error exception)

Introduction

PHP’s Exception class implements the Throwable interface. The ErrorException class inherits the Exception class. ErrorException can be thrown explicitly when you want to catch and handle an otherwise ignored error, such as a notification or warning.

PHP core contains the following predefined error constants

Value	Constant	Description
1	E_ERROR	Fatal runtime error.
2	E_WARNING	Run-time warning (non-fatal error).
4	E_PARSE	Parse error during compilation.
8	E_NOTICE	Runtime notification.
16	E_CORE_ERROR	A fatal error that occurred during the initial startup of PHP.
32	E_CORE_WARNING	A warning (non-fatal error) that occurs during the initial startup of PHP.
64	E_COMPILE_ERROR	Fatal compile-time error.
128	E_COMPILE_WARNING	Compile-time warning (non-fatal error).
256	E_USER_ERROR	User generated error message.
512	E_USER_WARNING	User generated warning message.
1024	E_USER_NOTICE	User-generated notification message.
2048	E_STRICT	If enabled, PHP recommends changes to your code to ensure code interoperability and forward compatibility.
4096	E_RECOVERABLE_ERROR	Catchable fatal error.
8192	E_DEPRECATED	Runtime notification.
16384	E_USER_DEPRECATED	User generated warning message.
32767	E_ALL	All errors and warnings, E_STRICT

except from Exception In addition to the properties and methods inherited by the class, the ErrorException class also introduces a property and a method, as shown below −

protected int severity ;
final public getSeverity ( void ) : int

The severity of the exception is represented by the integer related to the error type in the above table

ErrorException Example

In the following script, the user-defined function errhandler is set as an error handler via the 通过set_error_handler() function. It throws an ErrorException when it encounters a fatal error that cannot read the file.

Example

Live Demonstration

<?php
function errhandler($severity, $message, $file, $line) {
   if (!(error_reporting() & $severity)) {
      echo "no error";
      return;
   }
   throw new ErrorException("Fatal Error:No such file or directory", 0, E_ERROR);
}
set_error_handler("errhandler");
/* Trigger exception */
try{
   $data=file_get_contents("nofile.php");
   echo $data;
}
catch (ErrorException $e){
   echo $e->getMessage();
}
?>

The above example shows the following output

Output

Fatal Error:No such file or directory

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