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@ 2017-07-13T09:45:42Z

<?php

if (defined('HHVM_VERSION')) {
    exit;
}

// https://www.mail-archive.com/internals@lists.php.net/msg87079.html
function str_begins($a, $b) {
   return substr_compare($a, $b, 0, strlen($b)) === 0;
}
function str_ends($a, $b) {
   return substr_compare($a, $b, -strlen($b)) === 0;
}

// Let's test edge cases
$funcs = [
    'str_begins',
    'str_ends',
];
$tests = [
    // array(array($main, $part), $expected)
    array(array("foo", "foo"), true),
    array(array("foo", ""), true),
    array(array("", "foo"), false),
    array(array("", ""), true),
];
foreach ($funcs as $func) {
    foreach ($tests as list(list($main, $part), $expected)) {
        echo $func . '(' . var_export($main, true) . ', ' . var_export($part, true) . '):' . PHP_EOL;
        echo " - Expected: "; var_dump($expected);
        echo " - Actual:   "; var_dump($actual = $func($main, $part));
        if ($actual !== $expected) {
            echo " => DIFF!" . PHP_EOL;
        }
        echo PHP_EOL;
    }
    echo PHP_EOL;
}

Output for git.master, git.master_jit, rfc.property-hooks: str_begins('foo', 'foo'): - Expected: bool(true) - Actual: bool(true) str_begins('foo', ''): - Expected: bool(true) - Actual: bool(true) str_begins('', 'foo'): - Expected: bool(false) - Actual: bool(false) str_begins('', ''): - Expected: bool(true) - Actual: bool(true) str_ends('foo', 'foo'): - Expected: bool(true) - Actual: bool(true) str_ends('foo', ''): - Expected: bool(true) - Actual: bool(false) => DIFF! str_ends('', 'foo'): - Expected: bool(false) - Actual: bool(false) str_ends('', ''): - Expected: bool(true) - Actual: bool(true)

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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