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@ 2018-05-25T23:44:32Z

<?php

function tryMultiple(callable $func, int $count=3, array $acceptable=['\Throwable']) {
    $success = false;
    for($i=0; $i<$count; $i++) {
        try {
            $v = $func();
            $success = true;
            break;
        } catch(\Throwable $t) {
            $is_ok = false;
            foreach($acceptable as $accept) {
                if( is_a($t, $accept) ) {
                    $is_ok = true;
                }
            }
            if( ! $is_ok ) {
                throw $t;
            }
        }
    }
    
    if($success) {
        return $v;
    } else {
        throw new \Exception("Failure count exceeded limit of $count.", 42, $t);
    }
}

$always_throws = function(){throw new \Exception('bork');};
$always_works  = function(){return 'work';};

var_dump(tryMultiple($always_works));
try { tryMultiple($always_throws); }        catch(Exception $e) { var_dump($e->getMessage()); }
try { tryMultiple($always_throws, 3, []); } catch(Exception $e) { var_dump($e->getMessage()); }

Output for git.master, git.master_jit, rfc.property-hooks: string(4) "work" string(34) "Failure count exceeded limit of 3." string(4) "bork"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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