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- <?php
- namespace Drupal\Component\Utility;
- /**
- * Provides Unicode-related conversions and operations.
- *
- * @ingroup utility
- */
- class Unicode {
- /**
- * Matches Unicode characters that are word boundaries.
- *
- * Characters with the following General_category (gc) property values are used
- * as word boundaries. While this does not fully conform to the Word Boundaries
- * algorithm described in http://unicode.org/reports/tr29, as PCRE does not
- * contain the Word_Break property table, this simpler algorithm has to do.
- * - Cc, Cf, Cn, Co, Cs: Other.
- * - Pc, Pd, Pe, Pf, Pi, Po, Ps: Punctuation.
- * - Sc, Sk, Sm, So: Symbols.
- * - Zl, Zp, Zs: Separators.
- *
- * Non-boundary characters include the following General_category (gc) property
- * values:
- * - Ll, Lm, Lo, Lt, Lu: Letters.
- * - Mc, Me, Mn: Combining Marks.
- * - Nd, Nl, No: Numbers.
- *
- * Note that the PCRE property matcher is not used because we wanted to be
- * compatible with Unicode 5.2.0 regardless of the PCRE version used (and any
- * bugs in PCRE property tables).
- *
- * @see http://unicode.org/glossary
- */
- const PREG_CLASS_WORD_BOUNDARY = <<<'EOD'
- \x{0}-\x{2F}\x{3A}-\x{40}\x{5B}-\x{60}\x{7B}-\x{A9}\x{AB}-\x{B1}\x{B4}
- \x{B6}-\x{B8}\x{BB}\x{BF}\x{D7}\x{F7}\x{2C2}-\x{2C5}\x{2D2}-\x{2DF}
- \x{2E5}-\x{2EB}\x{2ED}\x{2EF}-\x{2FF}\x{375}\x{37E}-\x{385}\x{387}\x{3F6}
- \x{482}\x{55A}-\x{55F}\x{589}-\x{58A}\x{5BE}\x{5C0}\x{5C3}\x{5C6}
- \x{5F3}-\x{60F}\x{61B}-\x{61F}\x{66A}-\x{66D}\x{6D4}\x{6DD}\x{6E9}
- \x{6FD}-\x{6FE}\x{700}-\x{70F}\x{7F6}-\x{7F9}\x{830}-\x{83E}
- \x{964}-\x{965}\x{970}\x{9F2}-\x{9F3}\x{9FA}-\x{9FB}\x{AF1}\x{B70}
- \x{BF3}-\x{BFA}\x{C7F}\x{CF1}-\x{CF2}\x{D79}\x{DF4}\x{E3F}\x{E4F}
- \x{E5A}-\x{E5B}\x{F01}-\x{F17}\x{F1A}-\x{F1F}\x{F34}\x{F36}\x{F38}
- \x{F3A}-\x{F3D}\x{F85}\x{FBE}-\x{FC5}\x{FC7}-\x{FD8}\x{104A}-\x{104F}
- \x{109E}-\x{109F}\x{10FB}\x{1360}-\x{1368}\x{1390}-\x{1399}\x{1400}
- \x{166D}-\x{166E}\x{1680}\x{169B}-\x{169C}\x{16EB}-\x{16ED}
- \x{1735}-\x{1736}\x{17B4}-\x{17B5}\x{17D4}-\x{17D6}\x{17D8}-\x{17DB}
- \x{1800}-\x{180A}\x{180E}\x{1940}-\x{1945}\x{19DE}-\x{19FF}
- \x{1A1E}-\x{1A1F}\x{1AA0}-\x{1AA6}\x{1AA8}-\x{1AAD}\x{1B5A}-\x{1B6A}
- \x{1B74}-\x{1B7C}\x{1C3B}-\x{1C3F}\x{1C7E}-\x{1C7F}\x{1CD3}\x{1FBD}
- \x{1FBF}-\x{1FC1}\x{1FCD}-\x{1FCF}\x{1FDD}-\x{1FDF}\x{1FED}-\x{1FEF}
- \x{1FFD}-\x{206F}\x{207A}-\x{207E}\x{208A}-\x{208E}\x{20A0}-\x{20B8}
- \x{2100}-\x{2101}\x{2103}-\x{2106}\x{2108}-\x{2109}\x{2114}
- \x{2116}-\x{2118}\x{211E}-\x{2123}\x{2125}\x{2127}\x{2129}\x{212E}
- \x{213A}-\x{213B}\x{2140}-\x{2144}\x{214A}-\x{214D}\x{214F}
- \x{2190}-\x{244A}\x{249C}-\x{24E9}\x{2500}-\x{2775}\x{2794}-\x{2B59}
- \x{2CE5}-\x{2CEA}\x{2CF9}-\x{2CFC}\x{2CFE}-\x{2CFF}\x{2E00}-\x{2E2E}
- \x{2E30}-\x{3004}\x{3008}-\x{3020}\x{3030}\x{3036}-\x{3037}
- \x{303D}-\x{303F}\x{309B}-\x{309C}\x{30A0}\x{30FB}\x{3190}-\x{3191}
- \x{3196}-\x{319F}\x{31C0}-\x{31E3}\x{3200}-\x{321E}\x{322A}-\x{3250}
- \x{3260}-\x{327F}\x{328A}-\x{32B0}\x{32C0}-\x{33FF}\x{4DC0}-\x{4DFF}
- \x{A490}-\x{A4C6}\x{A4FE}-\x{A4FF}\x{A60D}-\x{A60F}\x{A673}\x{A67E}
- \x{A6F2}-\x{A716}\x{A720}-\x{A721}\x{A789}-\x{A78A}\x{A828}-\x{A82B}
- \x{A836}-\x{A839}\x{A874}-\x{A877}\x{A8CE}-\x{A8CF}\x{A8F8}-\x{A8FA}
- \x{A92E}-\x{A92F}\x{A95F}\x{A9C1}-\x{A9CD}\x{A9DE}-\x{A9DF}
- \x{AA5C}-\x{AA5F}\x{AA77}-\x{AA79}\x{AADE}-\x{AADF}\x{ABEB}
- \x{E000}-\x{F8FF}\x{FB29}\x{FD3E}-\x{FD3F}\x{FDFC}-\x{FDFD}
- \x{FE10}-\x{FE19}\x{FE30}-\x{FE6B}\x{FEFF}-\x{FF0F}\x{FF1A}-\x{FF20}
- \x{FF3B}-\x{FF40}\x{FF5B}-\x{FF65}\x{FFE0}-\x{FFFD}
- EOD;
- /**
- * Indicates that standard PHP (emulated) unicode support is being used.
- */
- const STATUS_SINGLEBYTE = 0;
- /**
- * Indicates that full unicode support with the PHP mbstring extension is
- * being used.
- */
- const STATUS_MULTIBYTE = 1;
- /**
- * Indicates an error during check for PHP unicode support.
- */
- const STATUS_ERROR = -1;
- /**
- * Gets the current status of unicode/multibyte support on this environment.
- *
- * @return int
- * The status of multibyte support. It can be one of:
- * - \Drupal\Component\Utility\Unicode::STATUS_MULTIBYTE
- * Full unicode support using an extension.
- * - \Drupal\Component\Utility\Unicode::STATUS_SINGLEBYTE
- * Standard PHP (emulated) unicode support.
- * - \Drupal\Component\Utility\Unicode::STATUS_ERROR
- * An error occurred. No unicode support.
- */
- public static function getStatus() {
- switch (static::check()) {
- case 'mb_strlen':
- return Unicode::STATUS_SINGLEBYTE;
- case '':
- return Unicode::STATUS_MULTIBYTE;
- }
- return Unicode::STATUS_ERROR;
- }
- /**
- * Sets the value for multibyte support status for the current environment.
- *
- * The following status keys are supported:
- * - \Drupal\Component\Utility\Unicode::STATUS_MULTIBYTE
- * Full unicode support using an extension.
- * - \Drupal\Component\Utility\Unicode::STATUS_SINGLEBYTE
- * Standard PHP (emulated) unicode support.
- * - \Drupal\Component\Utility\Unicode::STATUS_ERROR
- * An error occurred. No unicode support.
- *
- * @param int $status
- * The new status of multibyte support.
- *
- * @deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. In
- * Drupal 9 there will be no way to set the status and in Drupal 8 this
- * ability has been removed because mb_*() functions are supplied using
- * Symfony's polyfill.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function setStatus($status) {
- @trigger_error('\Drupal\Component\Utility\Unicode::setStatus() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. In Drupal 9 there will be no way to set the status and in Drupal 8 this ability has been removed because mb_*() functions are supplied using Symfony\'s polyfill. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- }
- /**
- * Checks for Unicode support in PHP and sets the proper settings if possible.
- *
- * Because of the need to be able to handle text in various encodings, we do
- * not support mbstring function overloading. HTTP input/output conversion
- * must be disabled for similar reasons.
- *
- * @return string
- * A string identifier of a failed multibyte extension check, if any.
- * Otherwise, an empty string.
- */
- public static function check() {
- // Set appropriate configuration.
- mb_internal_encoding('utf-8');
- mb_language('uni');
- // Check for mbstring extension.
- if (!extension_loaded('mbstring')) {
- return 'mb_strlen';
- }
- // Check mbstring configuration.
- if (ini_get('mbstring.func_overload') != 0) {
- return 'mbstring.func_overload';
- }
- if (ini_get('mbstring.encoding_translation') != 0) {
- return 'mbstring.encoding_translation';
- }
- // mbstring.http_input and mbstring.http_output are deprecated and empty by
- // default in PHP 5.6.
- if (version_compare(PHP_VERSION, '5.6.0') == -1) {
- if (ini_get('mbstring.http_input') != 'pass') {
- return 'mbstring.http_input';
- }
- if (ini_get('mbstring.http_output') != 'pass') {
- return 'mbstring.http_output';
- }
- }
- return '';
- }
- /**
- * Decodes UTF byte-order mark (BOM) into the encoding's name.
- *
- * @param string $data
- * The data possibly containing a BOM. This can be the entire contents of
- * a file, or just a fragment containing at least the first five bytes.
- *
- * @return string|bool
- * The name of the encoding, or FALSE if no byte order mark was present.
- */
- public static function encodingFromBOM($data) {
- static $bomMap = [
- "\xEF\xBB\xBF" => 'UTF-8',
- "\xFE\xFF" => 'UTF-16BE',
- "\xFF\xFE" => 'UTF-16LE',
- "\x00\x00\xFE\xFF" => 'UTF-32BE',
- "\xFF\xFE\x00\x00" => 'UTF-32LE',
- "\x2B\x2F\x76\x38" => 'UTF-7',
- "\x2B\x2F\x76\x39" => 'UTF-7',
- "\x2B\x2F\x76\x2B" => 'UTF-7',
- "\x2B\x2F\x76\x2F" => 'UTF-7',
- "\x2B\x2F\x76\x38\x2D" => 'UTF-7',
- ];
- foreach ($bomMap as $bom => $encoding) {
- if (strpos($data, $bom) === 0) {
- return $encoding;
- }
- }
- return FALSE;
- }
- /**
- * Converts data to UTF-8.
- *
- * Requires the iconv, GNU recode or mbstring PHP extension.
- *
- * @param string $data
- * The data to be converted.
- * @param string $encoding
- * The encoding that the data is in.
- *
- * @return string|bool
- * Converted data or FALSE.
- */
- public static function convertToUtf8($data, $encoding) {
- return @iconv($encoding, 'utf-8', $data);
- }
- /**
- * Truncates a UTF-8-encoded string safely to a number of bytes.
- *
- * If the end position is in the middle of a UTF-8 sequence, it scans backwards
- * until the beginning of the byte sequence.
- *
- * Use this function whenever you want to chop off a string at an unsure
- * location. On the other hand, if you're sure that you're splitting on a
- * character boundary (e.g. after using strpos() or similar), you can safely
- * use substr() instead.
- *
- * @param string $string
- * The string to truncate.
- * @param int $len
- * An upper limit on the returned string length.
- *
- * @return string
- * The truncated string.
- */
- public static function truncateBytes($string, $len) {
- if (strlen($string) <= $len) {
- return $string;
- }
- if ((ord($string[$len]) < 0x80) || (ord($string[$len]) >= 0xC0)) {
- return substr($string, 0, $len);
- }
- // Scan backwards to beginning of the byte sequence.
- // @todo Make the code more readable in https://www.drupal.org/node/2911497.
- while (--$len >= 0 && ord($string[$len]) >= 0x80 && ord($string[$len]) < 0xC0) {
- }
- return substr($string, 0, $len);
- }
- /**
- * Counts the number of characters in a UTF-8 string.
- *
- * This is less than or equal to the byte count.
- *
- * @param string $text
- * The string to run the operation on.
- *
- * @return int
- * The length of the string.
- *
- * @deprecated in Drupal 8.6.0, will be removed before Drupal 9.0.0. Use
- * mb_strlen() instead.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function strlen($text) {
- @trigger_error('\Drupal\Component\Utility\Unicode::strlen() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use mb_strlen() instead. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- return mb_strlen($text);
- }
- /**
- * Converts a UTF-8 string to uppercase.
- *
- * @param string $text
- * The string to run the operation on.
- *
- * @return string
- * The string in uppercase.
- *
- * @deprecated in Drupal 8.6.0, will be removed before Drupal 9.0.0. Use
- * mb_strtoupper() instead.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function strtoupper($text) {
- @trigger_error('\Drupal\Component\Utility\Unicode::strtoupper() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use mb_strtoupper() instead. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- return mb_strtoupper($text);
- }
- /**
- * Converts a UTF-8 string to lowercase.
- *
- * @param string $text
- * The string to run the operation on.
- *
- * @return string
- * The string in lowercase.
- *
- * @deprecated in Drupal 8.6.0, will be removed before Drupal 9.0.0. Use
- * mb_strtolower() instead.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function strtolower($text) {
- @trigger_error('\Drupal\Component\Utility\Unicode::strtolower() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use mb_strtolower() instead. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- return mb_strtolower($text);
- }
- /**
- * Capitalizes the first character of a UTF-8 string.
- *
- * @param string $text
- * The string to convert.
- *
- * @return string
- * The string with the first character as uppercase.
- */
- public static function ucfirst($text) {
- return mb_strtoupper(mb_substr($text, 0, 1)) . mb_substr($text, 1);
- }
- /**
- * Converts the first character of a UTF-8 string to lowercase.
- *
- * @param string $text
- * The string that will be converted.
- *
- * @return string
- * The string with the first character as lowercase.
- *
- * @ingroup php_wrappers
- */
- public static function lcfirst($text) {
- // Note: no mbstring equivalent!
- return mb_strtolower(mb_substr($text, 0, 1)) . mb_substr($text, 1);
- }
- /**
- * Capitalizes the first character of each word in a UTF-8 string.
- *
- * @param string $text
- * The text that will be converted.
- *
- * @return string
- * The input $text with each word capitalized.
- *
- * @ingroup php_wrappers
- */
- public static function ucwords($text) {
- $regex = '/(^|[' . static::PREG_CLASS_WORD_BOUNDARY . '])([^' . static::PREG_CLASS_WORD_BOUNDARY . '])/u';
- return preg_replace_callback($regex, function (array $matches) {
- return $matches[1] . mb_strtoupper($matches[2]);
- }, $text);
- }
- /**
- * Cuts off a piece of a string based on character indices and counts.
- *
- * Follows the same behavior as PHP's own substr() function. Note that for
- * cutting off a string at a known character/substring location, the usage of
- * PHP's normal strpos/substr is safe and much faster.
- *
- * @param string $text
- * The input string.
- * @param int $start
- * The position at which to start reading.
- * @param int $length
- * The number of characters to read.
- *
- * @return string
- * The shortened string.
- *
- * @deprecated in Drupal 8.6.0, will be removed before Drupal 9.0.0. Use
- * mb_substr() instead.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function substr($text, $start, $length = NULL) {
- @trigger_error('\Drupal\Component\Utility\Unicode::substr() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use mb_substr() instead. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- return mb_substr($text, $start, $length);
- }
- /**
- * Truncates a UTF-8-encoded string safely to a number of characters.
- *
- * @param string $string
- * The string to truncate.
- * @param int $max_length
- * An upper limit on the returned string length, including trailing ellipsis
- * if $add_ellipsis is TRUE.
- * @param bool $wordsafe
- * If TRUE, attempt to truncate on a word boundary. Word boundaries are
- * spaces, punctuation, and Unicode characters used as word boundaries in
- * non-Latin languages; see Unicode::PREG_CLASS_WORD_BOUNDARY for more
- * information. If a word boundary cannot be found that would make the length
- * of the returned string fall within length guidelines (see parameters
- * $max_length and $min_wordsafe_length), word boundaries are ignored.
- * @param bool $add_ellipsis
- * If TRUE, add '...' to the end of the truncated string (defaults to
- * FALSE). The string length will still fall within $max_length.
- * @param int $min_wordsafe_length
- * If $wordsafe is TRUE, the minimum acceptable length for truncation (before
- * adding an ellipsis, if $add_ellipsis is TRUE). Has no effect if $wordsafe
- * is FALSE. This can be used to prevent having a very short resulting string
- * that will not be understandable. For instance, if you are truncating the
- * string "See myverylongurlexample.com for more information" to a word-safe
- * return length of 20, the only available word boundary within 20 characters
- * is after the word "See", which wouldn't leave a very informative string. If
- * you had set $min_wordsafe_length to 10, though, the function would realise
- * that "See" alone is too short, and would then just truncate ignoring word
- * boundaries, giving you "See myverylongurl..." (assuming you had set
- * $add_ellipses to TRUE).
- *
- * @return string
- * The truncated string.
- */
- public static function truncate($string, $max_length, $wordsafe = FALSE, $add_ellipsis = FALSE, $min_wordsafe_length = 1) {
- $ellipsis = '';
- $max_length = max($max_length, 0);
- $min_wordsafe_length = max($min_wordsafe_length, 0);
- if (mb_strlen($string) <= $max_length) {
- // No truncation needed, so don't add ellipsis, just return.
- return $string;
- }
- if ($add_ellipsis) {
- // Truncate ellipsis in case $max_length is small.
- $ellipsis = mb_substr('…', 0, $max_length);
- $max_length -= mb_strlen($ellipsis);
- $max_length = max($max_length, 0);
- }
- if ($max_length <= $min_wordsafe_length) {
- // Do not attempt word-safe if lengths are bad.
- $wordsafe = FALSE;
- }
- if ($wordsafe) {
- $matches = [];
- // Find the last word boundary, if there is one within $min_wordsafe_length
- // to $max_length characters. preg_match() is always greedy, so it will
- // find the longest string possible.
- $found = preg_match('/^(.{' . $min_wordsafe_length . ',' . $max_length . '})[' . Unicode::PREG_CLASS_WORD_BOUNDARY . ']/us', $string, $matches);
- if ($found) {
- $string = $matches[1];
- }
- else {
- $string = mb_substr($string, 0, $max_length);
- }
- }
- else {
- $string = mb_substr($string, 0, $max_length);
- }
- if ($add_ellipsis) {
- // If we're adding an ellipsis, remove any trailing periods.
- $string = rtrim($string, '.');
- $string .= $ellipsis;
- }
- return $string;
- }
- /**
- * Compares UTF-8-encoded strings in a binary safe case-insensitive manner.
- *
- * @param string $str1
- * The first string.
- * @param string $str2
- * The second string.
- *
- * @return int
- * Returns < 0 if $str1 is less than $str2; > 0 if $str1 is greater than
- * $str2, and 0 if they are equal.
- */
- public static function strcasecmp($str1, $str2) {
- return strcmp(mb_strtoupper($str1), mb_strtoupper($str2));
- }
- /**
- * Encodes MIME/HTTP headers that contain incorrectly encoded characters.
- *
- * For example, Unicode::mimeHeaderEncode('tést.txt') returns
- * "=?UTF-8?B?dMOpc3QudHh0?=".
- *
- * See http://www.rfc-editor.org/rfc/rfc2047.txt for more information.
- *
- * Notes:
- * - Only encode strings that contain non-ASCII characters.
- * - We progressively cut-off a chunk with self::truncateBytes(). This ensures
- * each chunk starts and ends on a character boundary.
- * - Using \n as the chunk separator may cause problems on some systems and
- * may have to be changed to \r\n or \r.
- *
- * @param string $string
- * The header to encode.
- * @param bool $shorten
- * If TRUE, only return the first chunk of a multi-chunk encoded string.
- *
- * @return string
- * The mime-encoded header.
- */
- public static function mimeHeaderEncode($string, $shorten = FALSE) {
- if (preg_match('/[^\x20-\x7E]/', $string)) {
- // floor((75 - strlen("=?UTF-8?B??=")) * 0.75);
- $chunk_size = 47;
- $len = strlen($string);
- $output = '';
- while ($len > 0) {
- $chunk = static::truncateBytes($string, $chunk_size);
- $output .= ' =?UTF-8?B?' . base64_encode($chunk) . "?=\n";
- if ($shorten) {
- break;
- }
- $c = strlen($chunk);
- $string = substr($string, $c);
- $len -= $c;
- }
- return trim($output);
- }
- return $string;
- }
- /**
- * Decodes MIME/HTTP encoded header values.
- *
- * @param string $header
- * The header to decode.
- *
- * @return string
- * The mime-decoded header.
- */
- public static function mimeHeaderDecode($header) {
- $callback = function ($matches) {
- $data = ($matches[2] == 'B') ? base64_decode($matches[3]) : str_replace('_', ' ', quoted_printable_decode($matches[3]));
- if (strtolower($matches[1]) != 'utf-8') {
- $data = static::convertToUtf8($data, $matches[1]);
- }
- return $data;
- };
- // First step: encoded chunks followed by other encoded chunks (need to collapse whitespace)
- $header = preg_replace_callback('/=\?([^?]+)\?(Q|B)\?([^?]+|\?(?!=))\?=\s+(?==\?)/', $callback, $header);
- // Second step: remaining chunks (do not collapse whitespace)
- return preg_replace_callback('/=\?([^?]+)\?(Q|B)\?([^?]+|\?(?!=))\?=/', $callback, $header);
- }
- /**
- * Flip U+C0-U+DE to U+E0-U+FD and back. Can be used as preg_replace callback.
- *
- * @param array $matches
- * An array of matches by preg_replace_callback().
- *
- * @return string
- * The flipped text.
- */
- public static function caseFlip($matches) {
- return $matches[0][0] . chr(ord($matches[0][1]) ^ 32);
- }
- /**
- * Checks whether a string is valid UTF-8.
- *
- * All functions designed to filter input should use drupal_validate_utf8
- * to ensure they operate on valid UTF-8 strings to prevent bypass of the
- * filter.
- *
- * When text containing an invalid UTF-8 lead byte (0xC0 - 0xFF) is presented
- * as UTF-8 to Internet Explorer 6, the program may misinterpret subsequent
- * bytes. When these subsequent bytes are HTML control characters such as
- * quotes or angle brackets, parts of the text that were deemed safe by filters
- * end up in locations that are potentially unsafe; An onerror attribute that
- * is outside of a tag, and thus deemed safe by a filter, can be interpreted
- * by the browser as if it were inside the tag.
- *
- * The function does not return FALSE for strings containing character codes
- * above U+10FFFF, even though these are prohibited by RFC 3629.
- *
- * @param string $text
- * The text to check.
- *
- * @return bool
- * TRUE if the text is valid UTF-8, FALSE if not.
- */
- public static function validateUtf8($text) {
- if (strlen($text) == 0) {
- return TRUE;
- }
- // With the PCRE_UTF8 modifier 'u', preg_match() fails silently on strings
- // containing invalid UTF-8 byte sequences. It does not reject character
- // codes above U+10FFFF (represented by 4 or more octets), though.
- return (preg_match('/^./us', $text) == 1);
- }
- /**
- * Finds the position of the first occurrence of a string in another string.
- *
- * @param string $haystack
- * The string to search in.
- * @param string $needle
- * The string to find in $haystack.
- * @param int $offset
- * If specified, start the search at this number of characters from the
- * beginning (default 0).
- *
- * @return int|false
- * The position where $needle occurs in $haystack, always relative to the
- * beginning (independent of $offset), or FALSE if not found. Note that
- * a return value of 0 is not the same as FALSE.
- *
- * @deprecated in Drupal 8.6.0, will be removed before Drupal 9.0.0. Use
- * mb_strpos() instead.
- *
- * @see https://www.drupal.org/node/2850048
- */
- public static function strpos($haystack, $needle, $offset = 0) {
- @trigger_error('\Drupal\Component\Utility\Unicode::strpos() is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use mb_strpos() instead. See https://www.drupal.org/node/2850048.', E_USER_DEPRECATED);
- return mb_strpos($haystack, $needle, $offset);
- }
- }
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