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@ 2013-07-31T14:02:57Z

<?php
$examples = array(
    'Valid ASCII' => array("a", true),
    'Valid 2 Octet Sequence' => array("\xc3\xb1", true),
    'Invalid 2 Octet Sequence' => array("\xc3\x28", false),
    'Invalid Sequence Identifier' => array("\xa0\xa1", false),
    'Valid 3 Octet Sequence' => array("\xe2\x82\xa1", true),
    'Invalid 3 Octet Sequence (in 2nd Octet)' => array("\xe2\x28\xa1", false),
    'Invalid 3 Octet Sequence (in 3rd Octet)' => array("\xe2\x82\x28", false),
    'Valid 4 Octet Sequence' => array("\xf0\x90\x8c\xbc", true),
    'Invalid 4 Octet Sequence (in 2nd Octet)' => array("\xf0\x28\x8c\xbc", false),
    'Invalid 4 Octet Sequence (in 3rd Octet)' => array("\xf0\x90\x28\xbc", false),
    'Invalid 4 Octet Sequence (in 4th Octet)' => array("\xf0\x28\x8c\x28", false),
    'Valid 5 Octet Sequence (but not Unicode!)' => array("\xf8\xa1\xa1\xa1\xa1", false),
    'Valid 6 Octet Sequence (but not Unicode!)' => array("\xfc\xa1\xa1\xa1\xa1\xa1", false),
);
function checkWithPreg($str) {
    return preg_match('//u', $str);
}
function checkWithMbstring($str) {
    return mb_check_encoding($str, 'UTF-8');
}
function test($actual, $expected, $title) {
    echo $actual == $expected ? "[Success]" : "[Fail]";
    echo " $title\n";
}
function runTests($method) {
    global $examples;
    foreach($examples as $title => $arr) {
        list($str, $bool) = $arr;
        test($method($str), $bool, $title);
    }
}

runTests('checkWithPreg');
echo "\n";
runTests('checkWithMbstring');

Output for git.master, git.master_jit, rfc.property-hooks: [Success] Valid ASCII [Success] Valid 2 Octet Sequence [Success] Invalid 2 Octet Sequence [Success] Invalid Sequence Identifier [Success] Valid 3 Octet Sequence [Success] Invalid 3 Octet Sequence (in 2nd Octet) [Success] Invalid 3 Octet Sequence (in 3rd Octet) [Success] Valid 4 Octet Sequence [Success] Invalid 4 Octet Sequence (in 2nd Octet) [Success] Invalid 4 Octet Sequence (in 3rd Octet) [Success] Invalid 4 Octet Sequence (in 4th Octet) [Success] Valid 5 Octet Sequence (but not Unicode!) [Success] Valid 6 Octet Sequence (but not Unicode!) [Success] Valid ASCII [Success] Valid 2 Octet Sequence [Success] Invalid 2 Octet Sequence [Success] Invalid Sequence Identifier [Success] Valid 3 Octet Sequence [Success] Invalid 3 Octet Sequence (in 2nd Octet) [Success] Invalid 3 Octet Sequence (in 3rd Octet) [Success] Valid 4 Octet Sequence [Success] Invalid 4 Octet Sequence (in 2nd Octet) [Success] Invalid 4 Octet Sequence (in 3rd Octet) [Success] Invalid 4 Octet Sequence (in 4th Octet) [Success] Valid 5 Octet Sequence (but not Unicode!) [Success] Valid 6 Octet Sequence (but not Unicode!)

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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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