catchable.php

<?php

class TestClass
{
    private $internalScalar;

    public function __construct($arg)
    {  
        $this->internalScalar = $arg;
    }
}   

set_error_handler(function($errno, $errstr, $errfile, $errline) {
    throw new Exception;
});     

function func(TestClass $a) {
        return $a;
}   
    
$arg = 1;
try {
    retry:
    func($arg);
    var_dump('done');
} catch (Exception $e) {
    $arg = new TestClass($arg);
    goto retry;
}