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@ 2013-07-25T01:35:20Z

<?php
function validate_utf8() {
    return (bool)preg_match('//u', serialize(func_get_args()));
}
function test($input) {

  $output = htmlspecialchars($input, ENT_QUOTES, 'UTF-8');
  $code = str_replace('%', '\\x', rawurlencode($input));

  if (validate_utf8($input)) {
      echo "【{$output}】({$code}) は有効なUTF-8シーケンスです。\n";
  } else {
      echo "({$code}) は無効なUTF-8シーケンスです。\n";
  }

}
test("☝( ◠‿◠ )☝");
test("ゔ〲〰");
test("\x0a\x92\xff"); // てきとー
test("\xef\xbb\xbf"); // BOMだっけ
test(""); // 空文字

echo "\n";

test("\x2f"); // スラッシュ(1バイト)
test("\xc0\xaf"); // スラッシュ(冗長2バイト)
test("\xe0\x80\xaf"); // スラッシュ(冗長3バイト)
test("\xf0\x80\x80\xaf"); // スラッシュ(冗長4バイト)

Output for git.master, git.master_jit, rfc.property-hooks: 【☝( ◠‿◠ )☝】(\xE2\x98\x9D\x28\x20\xE2\x97\xA0\xE2\x80\xBF\xE2\x97\xA0\x20\x29\xE2\x98\x9D) は有効なUTF-8シーケンスです。【ゔ〲〰】(\xE3\x82\x94\xE3\x80\xB2\xE3\x80\xB0) は有効なUTF-8シーケンスです。 (\x0A\x92\xFF) は無効なUTF-8シーケンスです。【】(\xEF\xBB\xBF) は有効なUTF-8シーケンスです。【】() は有効なUTF-8シーケンスです。【/】(\x2F) は有効なUTF-8シーケンスです。 (\xC0\xAF) は無効なUTF-8シーケンスです。 (\xE0\x80\xAF) は無効なUTF-8シーケンスです。 (\xF0\x80\x80\xAF) は無効なUTF-8シーケンスです。

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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