Exception
PHP Manual

Exception::getPrevious

Returns previous Throwable

Description

final public Throwablenull Exception::getPrevious()

Returns previous Throwable (which had been passed as the third parameter of Exception::__construct).

Parameters

This function has no parameters.

Return Values

Returns the previous Throwable if available or 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->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) [MyCustomException]
/home/bjori/ex.php:6 You are doing it wrong! (112) [InvalidArgumentException]

See Also

  • Throwable::getPrevious