Online PHP editor | rfc for 2M47K

@ 2020-03-03T09:41:07Z

<?php

function iterateOverIt($iterable) {
    // First foreach acts like a guard condition
    foreach ($iterable as $_) {
        
        // Pre-processing:
        echo "<ul>\n";
        
        // Real looping, this won't start a *NEW* iteration process but will continue the one started above:
        foreach ($iterable as $item) {
            echo "<li>", $item instanceof DateTime ? $item->format("c") : (
                isset($item["col"]) ? $item["col"] : $item
            ), "</li>\n";
        }
        
        // Post-processing:
        echo "</ul>\n";
        break;
    }
}

// Empty array
iterateOverIt([]);
iterateOverIt([1, 2, 3]);

// Empty generator
iterateOverIt(function () : Generator {
    return;
    yield;
});
iterateOverIt((function () : Generator {
    yield 4;
    yield 5;
    yield 6;
})());

// Class with no public properties
iterateOverIt(new stdClass());
iterateOverIt(new class { public $a = 7, $b = 8, $c = 9;});

/*
$db = mysqli_connect("localhost", "user", "pass", "db");
// Empty resultset
iterateOverIt($db->query("SELECT 0 FROM DUAL WHERE false"));
iterateOverIt($db->query("SELECT 10 AS col UNION SELECT 11 UNION SELECT 12"));
*/

// DatePeriod generating no dates
iterateOverIt(new DatePeriod(new DateTime("2020-01-01 00:00:00"), new DateInterval("P1D"), new DateTime("2020-01-01 00:00:00"), DatePeriod::EXCLUDE_START_DATE));
iterateOverIt(new DatePeriod(new DateTime("2020-01-01 00:00:00"), new DateInterval("P1D"), 3, DatePeriod::EXCLUDE_START_DATE));

Output for git.master, git.master_jit, rfc.property-hooks: <ul> <li>1</li> <li>2</li> <li>3</li> </ul> <ul> <li>4</li> <li>5</li> <li>6</li> </ul> <ul> <li>7</li> <li>8</li> <li>9</li> </ul> <ul> <li>2020-01-02T00:00:00+01:00</li> <li>2020-01-03T00:00:00+01:00</li> <li>2020-01-04T00:00:00+01:00</li> </ul>

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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