PHP 7.1.2 Released

Exception::getPrevious

(PHP 5 >= 5.3.0, PHP 7)

Exception::getPreviousReturns previous Exception

Descrierea

final public Throwable Exception::getPrevious ( void )

Returns previous exception (the third parameter of Exception::__construct()).

Parametri

Această funcție nu are parametri.

Valorile întoarse

Returns the previous Throwable if available or NULL otherwise.

Istoricul schimbărilor

Versiune Descriere
7.0.0 The return type declaration changed to Throwable.

Exemple

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());
}
?>

Exemplul de mai sus va afișa ceva similar cu:

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

A se vedea și

add a note add a note

User Contributed Notes 1 note

up
-2
Anonymous
5 years ago
May be I am late (5.2 is not supported). But if you want use the functionality of "previous Exception" in PHP < 5.3 or write compatible code, you can use next way as below.

<?php
abstract class App_Exception_PreviousNativeAbstract extends Exception {
    public static
$printPrevious = true;

    public function
__toString() {
       
$result   = array();
       
$result[] = sprintf("Exception '%s' with message '(%s) %s' in %s:%d", get_class($this), $this->code, $this->message, $this->file, $this->line);
       
$result[] = '---[Stack trace]:';
       
$result[] = $this->getTraceAsString();

        if (
self::$printPrevious) {
           
$previous = $this->getPrevious();
            if (
$previous) {
                do {
                   
$result[] = '---[Previous exception]:';
                   
$result[] = sprintf("Exception '%s' with message '(%s) %s' in %s:%d", get_class($previous), $previous->getCode(), $previous->getMessage(), $previous->getFile(), $previous->getLine());
                   
$result[] = '---[Stack trace]:';
                   
$result[] = $previous->getTraceAsString();
                } while(
method_exists($previous, 'getPrevious') && ($previous = $previous->getPrevious()));
            }
        }

        return
implode("\r\n", $result);
    }
}

abstract class
App_Exception_PreviousLegacyAbstract extends App_Exception_PreviousNativeAbstract {
    protected
$previous;

    public function
__construct($message, $code = 0, Exception $previous = null) {
       
$this->previous = $previous;

       
parent::__construct($message, $code);
    }

    public function
getPrevious() {
        return
$this->previous;
    }
}

if (
version_compare(PHP_VERSION, '5.3.0', '>=')) {
    abstract class
App_Exception_PreviousAbstract extends App_Exception_PreviousNativeAbstract {}
}
else {
    abstract class
App_Exception_PreviousAbstract extends App_Exception_PreviousLegacyAbstract {}
}

class
App_Exception extends App_Exception_PreviousAbstract {
    public function
__construct($message, $code = 0, Exception $previous = null) {
       
parent::__construct($message, 0, $previous);
    }
}

// Example:
try {
   
// ...
   
throw new Exception('Exception mesage');
   
// ...
} catch (Exception $e) {
    throw new
App_Exception('App exception mesage', 0, $e);
}
?>
To Top