PHP: Hypertext Preprocessor (original) (raw)

Exception::getPrevious

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

Exception::getPrevious — Returns previous Throwable

Description

final public Exception::getPrevious(): ?Throwable

Parameters

This function has no parameters.

Return Values

Returns the previous Throwable if available or [null](reserved.constants.php#constant.null) otherwise.

Examples

Example #1 Exception::getPrevious() example

Looping over, and printing out, exception trace.

`<?php
class MyCustomException extends Exception {}

function

doStuff() {
try {
throw new InvalidArgumentException("You are doing it wrong!", 112);
} catch(Exception $e) {
throw new MyCustomException("Something happened", 911, $e);
}
}

try {

doStuff();
} catch(Exception $e) {
do {
printf("%s:%d %s (%d) [%s]\n", e−>getFile(),e->getFile(), e−>getFile(),e->getLine(), e−>getMessage(),e->getMessage(), e−>getMessage(),e->getCode(), get_class($e));
} while($e = $e->getPrevious());
}
?>`

The above example will output something similar to:

/home/bjori/ex.php:8 Something happened (911) [MyCustomException] /home/bjori/ex.php:6 You are doing it wrong! (112) [InvalidArgumentException]

Found A Problem?

harry at upmind dot com ¶

6 years ago

`/**

• Gets sequential array of all previously-chained errors
• @param Throwable $error
• @return Throwable[]
  */
  function getChain(Throwable $error) : array
  {
  $chain = [];

do {
chain[]=chain[] = chain[]=error;
} while ($error = $error->getPrevious());

return $chain;
}

`