You can catch both exceptions and errors by catching(Throwable)

Throwable does not work on PHP 5.x.

To catch both exceptions and errors in PHP 5.x and 7, add a catch block for Exception AFTER catching Throwable first.
Once PHP 5.x support is no longer needed, the block catching Exception can be removed.

try
{
   // Code that may throw an Exception or Error.
}
catch (Throwable $t)
{
   // Executed only in PHP 7, will not match in PHP 5
}
catch (Exception $e)
{
   // Executed only in PHP 5, will not be reached in PHP 7
}

<?php

set_error_handler(function(int $number, string $message) {
   echo "Handler captured error $number: '$message'" . PHP_EOL  ;
});

try {
    echo $x; # notice, handled on callable
    pg_exec(null, null); # warning, handled on callable
    fho(); # fatal error, stop running and catched
} catch (Throwable $e) {
    echo "Captured Throwable: " . $e->getMessage() . PHP_EOL;
}

?>

set_error_handler will also works without try and catch

An excellent blog post on the difference between exceptions, throwables and how PHP 7 handles these can be found here: https://trowski.com/2015/06/24/throwable-exceptions-and-errors-in-php7/

php 7.1

try {
   // Code that may throw an Exception or ArithmeticError.
} catch (ArithmeticError | Exception $e) {
   // pass
}