Returns previous Throwable

# Error::getPrevious

(PHP 7, PHP 8)

Error::getPrevious — Returns previous Throwable

### Description

final public Error::getPrevious(): ?Throwable

Returns previous Throwable (the third parameter of Error::__construct()).

### Parameters

This function has no parameters.

### Return Values

Returns the previous Throwable if available or `null` otherwise.

### Examples

Example #1 Error::getPrevious() example

Looping over, and printing out, error trace.

`<?php
class MyCustomError extends Error {}
function doStuff() {
try {
throw new InvalidArgumentError("You are doing it wrong!", 112);
} catch(Error $e) {
throw new MyCustomError("Something happened", 911, $e);
}
}
try {
doStuff();
} catch(Error $e) {
do {
printf("%s:%d %s (%d) [%s]\n", $e->getFile(), $e->getLine(), $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) [MyCustomError]
    /home/bjori/ex.php:6 You are doing it wrong! (112) [InvalidArgumentError]

### See Also

- Throwable::getPrevious() - Returns the previous Throwable

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