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Error Handling Funzioni> <Costanti predefinite
Last updated: Fri, 18 Jul 2008

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Esempi

Di seguito sarà illustrato un esempio di utilizzo delle procedure di gestione dell'errore in PHP. Qui si definisce una funzione di gestione dell'errore che registra le informazioni in un file (in formato XML) e invia tramite e-mail allo sviluppare dei messaggi in caso di errori critici.

Example #1 Esempio dell'utilizzo di della gestione degli erorri in uno script

<?php
// attiveremo la nostra gestione degli errori
error_reporting(0);

// funzione personalizzata di gestione dell'errore
function userErrorHandler($errno$errmsg$filename$linenum$vars
{
    
// orario per la registrazione
    
$dt date("Y-m-d H:i:s (T)");

    
// definisce una matrice associativa con i messaggi di errore
    // in realtà i soli campi che saranno considerati sono
    // E_WARNING, E_NOTICE, E_USER_ERROR,
    // E_USER_WARNING and E_USER_NOTICE
    
$errortype = array (
                
E_ERROR           => "Error",
                
E_WARNING         => "Warning",
                
E_PARSE           => "Parsing Error",
                
E_NOTICE          => "Notice",
                
E_CORE_ERROR      => "Core Error",
                
E_CORE_WARNING    => "Core Warning",
                
E_COMPILE_ERROR   => "Compile Error",
                
E_COMPILE_WARNING => "Compile Warning",
                
E_USER_ERROR      => "User Error",
                
E_USER_WARNING    => "User Warning",
                
E_USER_NOTICE     => "User Notice",
                
E_STRICT          => "Runtime Notice"
                
);
    
// indica gli errori per i quali fare salvare la trace delle variabili
    
$user_errors = array(E_USER_ERRORE_USER_WARNINGE_USER_NOTICE);
    
    
$err "<errorentry>\n";
    
$err .= "\t<datetime>" $dt "</datetime>\n";
    
$err .= "\t<errornum>" $errno "</errornum>\n";
    
$err .= "\t<errortype>" $errortype[$errno] . "</errortype>\n";
    
$err .= "\t<errormsg>" $errmsg "</errormsg>\n";
    
$err .= "\t<scriptname>" $filename "</scriptname>\n";
    
$err .= "\t<scriptlinenum>" $linenum "</scriptlinenum>\n";

    if (
in_array($errno$user_errors)) {
        
$err .= "\t<vartrace>" wddx_serialize_value($vars"Variables") . "</vartrace>\n";
    }
    
$err .= "</errorentry>\n\n";
    
    
// for testing
    // echo $err;

    // salva nell'errorlog e invia un e-mail se vi sono errori critici
    
error_log($err3"/usr/local/php4/error.log");
    if (
$errno == E_USER_ERROR) {
        
mail("phpdev@example.com""Critical User Error"$err);
    }
}


function 
distance($vect1$vect2
{
    if (!
is_array($vect1) || !is_array($vect2)) {
        
trigger_error("Incorrect parameters, arrays expected"E_USER_ERROR);
        return 
NULL;
    }

    if (
count($vect1) != count($vect2)) {
        
trigger_error("Vectors need to be of the same size"E_USER_ERROR);
        return 
NULL;
    }

    for (
$i=0$i<count($vect1); $i++) {
        
$c1 $vect1[$i]; $c2 $vect2[$i];
        
$d 0.0;
        if (!
is_numeric($c1)) {
            
trigger_error("Coordinate $i in vector 1 is not a number, using zero"
                            
E_USER_WARNING);
            
$c1 0.0;
        }
        if (!
is_numeric($c2)) {
            
trigger_error("Coordinate $i in vector 2 is not a number, using zero"
                            
E_USER_WARNING);
            
$c2 0.0;
        }
        
$d += $c2*$c2 $c1*$c1;
    }
    return 
sqrt($d);
}

$old_error_handler set_error_handler("userErrorHandler");

// variabile non definita, genera un warning
$t I_AM_NOT_DEFINED;

// definisce dei vettori
$a = array(23"foo");
$b = array(5.54.3, -1.6);
$c = array(1, -3);

// genera un errore utente
$t1 distance($c$b) . "\n";

// un'altro errore utente
$t2 distance($b"i am not an array") . "\n";

// genera un warning
$t3 distance($a$b) . "\n";

?>



add a note add a note User Contributed Notes
Esempi
KBurkholder at EarthAsylum dot com
30-Jun-2008 05:29
Providing an example...

eac_error.class is a PHP static utility class for error handling. It is intended to be used throughout the PHP application for capture and reporting of errors and exceptions.

The error handling routine in eac_error.class is designed to provide detailed state information for the developer or administrator while still maintaining a secure environment. Error messages are only presented to the web user on true error conditions and do not include information that may be used to compromise the system. Notifications are sent to the webmaster/administrator in an encrypted state (using GnuPG) so that critical, private information cannot be intercepted in transit.

Features

GnuPG encrypted email sent to the web administrator.
Detailed system information included with email.
Function and class trace back information included.
Log errors to a single file or multiple files based on severity (fatal, error, warning ,notice).
Send email notice for each error or for all errors at the end of script execution.
Suppress or allow options (email, display, logging, etc.) when error is triggered.
Provide a program-designated error code with the error message.
Set a callback function to display errors and abort processing.
Include user-defined data in the error notification email.
Error condition detectable by AJAX and CURL.

http://www.kevinburkholder.com/sw_error.php

Error Handling Funzioni> <Costanti predefinite
Last updated: Fri, 18 Jul 2008
 
 
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