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PHP ErrorException
Introduction
PHP's Exception class implements the Throwable interface. ErrorException class extends the Exception class. ErrorException is meant to be explicitly thrown when you want to catch and handle errors that would otherwise be ignored, such as Notices or Warnings.
PHP core consists of following predefined error constants
| Value | Constant | Description |
|---|---|---|
| 1 | E_ERROR | Fatal run-time errors. |
| 2 | E_WARNING | Run-time warnings (non-fatal errors). |
| 4 | E_PARSE | Compile-time parse errors. |
| 8 | E_NOTICE | Run-time notices. |
| 16 | E_CORE_ERROR | Fatal errors that occur during PHP's initial startup. |
| 32 | E_CORE_WARNING | Warnings (non-fatal errors) that occur during PHP's initial startup. |
| 64 | E_COMPILE_ERROR | Fatal compile-time errors. |
| 128 | E_COMPILE_WARNING | Compile-time warnings (non-fatal errors). |
| 256 | E_USER_ERROR | User-generated error message. |
| 512 | E_USER_WARNING | User-generated warning message. |
| 1024 | E_USER_NOTICE | User-generated notice message. |
| 2048 | E_STRICT | If Enabled PHP suggests changes to your code to ensure interoperability and forward compatibility of your code. |
| 4096 | E_RECOVERABLE_ERROR | Catchable fatal error. |
| 8192 | E_DEPRECATED | Run-time notices. |
| 16384 | E_USER_DEPRECATED | User-generated warning message. |
| 32767 | E_ALL | All errors and warnings, E_STRICT |
In addition to properties and methods inherited from Exception class, ErrorException class introduces one property and one method as follows −
protected int severity ; final public getSeverity ( void ) : int
The severity of exception is represented by integer number associated with type of error in above table
ErrorException example
In following script, a user defined function errhandler is set as Error handler with set_error_handler() function. It throws ErrorException when fatal error in event of file not found for reading is encountered.
Example
<?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();
}
?>Above example displays following output
Output
Fatal Error:No such file or directory
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