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<?php |
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namespace Vanderlee\Sentence; |
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/** |
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* Multibyte-safe utility functions |
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*/ |
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class Multibyte |
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{ |
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/** |
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* Multibyte.php safe version of standard trim() function. |
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* |
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* @param string $string |
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* @return string |
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*/ |
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public static function trim($string) |
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{ |
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return mb_ereg_replace('^\s*([\s\S]*?)\s*$', '\1', $string); |
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} |
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/** |
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* A cross between mb_split and preg_split, adding the preg_split flags |
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* to mb_split. |
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* |
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* @param string $pattern |
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* @param string $string |
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* @param int $limit |
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* @param int $flags |
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* @return array |
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*/ |
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public static function split($pattern, $string, $limit = -1, $flags = 0) |
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{ |
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$split_no_empty = (bool)($flags & PREG_SPLIT_NO_EMPTY); |
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$offset_capture = (bool)($flags & PREG_SPLIT_OFFSET_CAPTURE); |
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$delim_capture = (bool)($flags & PREG_SPLIT_DELIM_CAPTURE); |
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$lengths = self::getSplitLengths($pattern, $string); |
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// Substrings |
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$parts = []; |
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$position = 0; |
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$count = 1; |
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foreach ($lengths as $length) { |
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$split_empty = !$split_no_empty || $length[0]; |
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$is_delimiter = $length[1]; |
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$is_captured = $delim_capture && $length[2]; |
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if ($limit > 0 |
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&& !$is_delimiter |
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&& $split_empty |
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&& ++$count > $limit) { |
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$cut = mb_strcut($string, $position); |
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$parts[] = $offset_capture |
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? [$cut, $position] |
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: $cut; |
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break; |
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} elseif ((!$is_delimiter |
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|| $is_captured) |
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&& $split_empty) { |
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$cut = mb_strcut($string, $position, $length[0]); |
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$parts[] = $offset_capture |
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? [$cut, $position] |
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: $cut; |
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} |
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$position += $length[0]; |
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} |
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return $parts; |
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} |
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/** |
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* Splits the string by pattern and for each element (part or split) returns: |
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* [ 0 => length, 1 => is_delimiter?, 2 => |
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* |
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* @param $pattern |
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* @param $string |
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* @return array |
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*/ |
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private static function getSplitLengths($pattern, $string) |
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{ |
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$strlen = strlen($string); // bytes! |
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$lengths = []; |
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mb_ereg_search_init($string); |
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$position = 0; |
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while ($position < $strlen |
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&& ($array = mb_ereg_search_pos($pattern, '')) !== false) { |
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// capture split |
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$lengths[] = [$array[0] - $position, false, null]; |
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// move position |
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$position = $array[0] + $array[1]; |
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// capture delimiter |
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$regs = mb_ereg_search_getregs(); |
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$lengths[] = [$array[1], true, isset($regs[1]) && $regs[1]]; |
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} |
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// Add last bit, if not ending with split |
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$lengths[] = [$strlen - $position, false, null]; |
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return $lengths; |
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} |
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} |
vanderlee /
php-sentence
