Question

How to set user-defined error handler function in PHP

Answer 1

/*
mixed set_error_handler ( callable $error_handler [, int $error_types = E_ALL | E_STRICT ] )
*/
   
function ErrorHandler($errno, $errstr) 
{
  echo "Error: [$errno] $errstr";
}


set_error_handler("ErrorHandler");

echo($number);

        
/*
run:

Error: [8] Undefined variable: number 
  
*/

 

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Answer 2

/*
mixed set_error_handler ( callable $error_handler [, int $error_types = E_ALL | E_STRICT ] )
*/
   
function ErrorHandler($errno, $errstr, $errfile, $errline)
{
    if (!(error_reporting() & $errno)) {
        return;
    }

    switch ($errno) 
    {
        case E_USER_ERROR:
            echo "<b>My ERROR</b> [$errno] $errstr<br />\n";
            echo "  Fatal error on line $errline in file $errfile";
            echo ", PHP " . PHP_VERSION . " (" . PHP_OS . ")<br />\n";
            echo "Program Exit!<br />\n";
            exit(1);
            break;

        case E_USER_WARNING:
            echo "WARNING: [$errno] $errstr<br />\n";
            break;

        case E_USER_NOTICE:
            echo "NOTICE: [$errno] $errstr<br />\n";
            break;

        default:
            echo "Error: [$errno] $errstr<br />\n";
            break;
    }
    return true;
}


set_error_handler("ErrorHandler");

echo(12/0);

        
/*
run:

Error: [2] Division by zero
  
*/

 

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