<?php
/**
* Adaptaçãoo e tradução de exemplo encotnrado no site oficial do PHP
* www.php.net
* Substitui o tratamento de erros original do PHP
*/
// set the error reporting level for this script
error_reporting(E_USER_ERROR | E_USER_WARNING | E_USER_NOTICE);
// error handler function
function myErrorHandler($errno, $errstr, $errfile, $errline){
switch ($errno) {
case E_USER_ERROR:
echo "<br><br><b><FONT COLOR=RED>ERRO</FONT></b>:-> [$errno] $errstr<br />";
echo " Erro fatal na linha $errline do arquivo \"$errfile\" ";
echo ", Versão do PHP: " . PHP_VERSION . " (No sistema operacional: " . PHP_OS . ")<br ><BR>";
echo "Abortando...<br /><BR>";
exit(1);
break;
case E_USER_WARNING:
echo "<br><br><b><FONT COLOR=RED>ALERTA</FONT></b> [$errno] $errstr<br />\n";
break;
case E_USER_NOTICE:
echo "<br><br><b><FONT COLOR=BLUE>AVISO</FONT></b> [$errno] $errstr<br />\n";
break;
default:
echo "Tipo desconhecido de erro: [$errno] $errstr<br />\n";
break;
}
}
// function to test the error handling
function scale_by_log($vect, $scale)
{
if (!is_numeric($scale) || $scale <= 0) {
trigger_error("log(x) for x <= 0 is undefined, you used: scale = $scale", E_USER_ERROR);
}
if (!is_array($vect)) {
trigger_error("Incorrect input vector, array of values expected", E_USER_WARNING);
return null;
}
for ($i=0; $i<count($vect); $i++) {
if (!is_numeric($vect[$i]))
trigger_error("Value at position $i is not a number, using 0 (zero)", E_USER_NOTICE);
$temp[$i] = log($scale) * $vect[$i];
}
return $temp;
}
// set to the user defined error handler
$old_error_handler = set_error_handler("myErrorHandler");
// trigger some errors, first define a mixed array with a non-numeric item
echo "vector a\n";
$a = array(2,3, "foo", 5.5, 43.3, 21.11);
print_r($a);
// now generate second array, generating a warning
echo "----\nvector b - a warning (b = log(PI) * a)\n";
$b = scale_by_log($a, M_PI);
print_r($b);
// this is trouble, we pass a string instead of an array
echo "----\nvector c - an error\n";
$c = scale_by_log("not array", 2.3);
var_dump($c);
// this is a critical error, log of zero or negative number is undefined
echo "----\nvector d - fatal error\n";
$d = scale_by_log($a, -2.5);
?>