preg_match

<?php             case 'string':

                $this->type = self::TYPE_STRING;

                $this->class = preg_match('//u', $value) ? self::STRING_UTF8 : self::STRING_BINARY;

                $this->cut = self::STRING_BINARY === $this->class ? \strlen($value) : mb_strlen($value, 'UTF-8');

                $this->value = '';

                break;

<?php             if (isset(self::$framesCache[$cacheKey])) {

                $a[$prefix.'src'] = self::$framesCache[$cacheKey];

            } else {

                if (preg_match('/\((\d+)\)(?:\([\da-f]{32}\))? : (?:eval\(\)\'d code|runtime-created function)$/', $f['file'], $match)) {

                    $f['file'] = substr($f['file'], 0, -\strlen($match[0]));

                    $f['line'] = (int) $match[1];

                }

<?php             $stub->cut = $c->cut;

            $stub->attr = $c->attr;



            if (Stub::TYPE_REF === $c->type && !$c->class && \is_string($c->value) && !preg_match('//u', $c->value)) {

                $stub->type = Stub::TYPE_STRING;

                $stub->class = Stub::STRING_BINARY;

            }

<?php         $cursor->hashLength = \count($children);

        $cursor->hashCut = $hashCut;

        foreach ($children as $key => $child) {

            $cursor->hashKeyIsBinary = isset($key[0]) && !preg_match('//u', $key);

            $cursor->hashKey = $dumpKeys ? $key : null;

            $this->dumpItem($dumper, $cursor, $refs, $child);

            if (++$cursor->hashIndex === $this->maxItemsPerDepth || $cursor->stop) {

<?php                         if ('' === $v) {

                            continue 2;

                        }

                        if (!preg_match('//u', $v)) {

                            $stub = new Stub();

                            $stub->type = Stub::TYPE_STRING;

                            $stub->class = Stub::STRING_BINARY;

<?php     protected function utf8Encode(?string $s)

    {

        if (null === $s || preg_match('//u', $s)) {

            return $s;

        }

<?php         $out = preg_replace('/[ \t]+$/m', '', $out);

        $var['file'] = htmlspecialchars($var['file'], \ENT_QUOTES, 'UTF-8');

        $intMax = \PHP_INT_MAX;

        preg_match('/sf-dump-\d+/', $out, $dumpId);

        $dumpId = $dumpId[0];

        $res = (int) $var['res'];