Chumper\Datatable\Engines\CollectionEngine::doInternalSearch PHP Метод

    private function doInternalSearch(Collection $columns, array $searchColumns)
    {
        if ((is_null($this->search) || empty($this->search)) && empty($this->fieldSearches)) {
            return;
        }
        $value = $this->search;
        $caseSensitive = $this->options['caseSensitive'];
        $toSearch = array();
        $searchType = self::AND_CONDITION;
        // Map the searchColumns to the real columns
        $ii = 0;
        foreach ($columns as $i => $col) {
            if (in_array($columns->get($i)->getName(), $searchColumns) || in_array($columns->get($i)->getName(), $this->fieldSearches)) {
                // map values to columns, where there is no value use the global value
                if (($field = array_search($columns->get($i)->getName(), $this->fieldSearches)) !== FALSE) {
                    $toSearch[$ii] = $this->columnSearches[$field];
                } else {
                    if ($value) {
                        $searchType = self::OR_CONDITION;
                    }
                    $toSearch[$ii] = $value;
                }
            }
            $ii++;
        }
        $self = $this;
        $this->workingCollection = $this->workingCollection->filter(function ($row) use($toSearch, $caseSensitive, $self, $searchType) {
            for ($i = 0, $stack = array(), $nb = count($row); $i < $nb; $i++) {
                if (!array_key_exists($i, $toSearch)) {
                    continue;
                }
                $column = $i;
                if ($self->getAliasMapping()) {
                    $column = $self->getNameByIndex($i);
                }
                if ($self->getOption('stripSearch')) {
                    $search = strip_tags($row[$column]);
                } else {
                    $search = $row[$column];
                }
                if ($caseSensitive) {
                    if ($self->exactWordSearch) {
                        if ($toSearch[$i] === $search) {
                            $stack[$i] = true;
                        }
                    } else {
                        if (str_contains($search, $toSearch[$i])) {
                            $stack[$i] = true;
                        }
                    }
                } else {
                    if ($self->getExactWordSearch()) {
                        if (mb_strtolower($toSearch[$i]) === mb_strtolower($search)) {
                            $stack[$i] = true;
                        }
                    } else {
                        if (str_contains(mb_strtolower($search), mb_strtolower($toSearch[$i]))) {
                            $stack[$i] = true;
                        }
                    }
                }
            }
            if ($searchType == $self::AND_CONDITION) {
                $result = array_diff_key(array_filter($toSearch), $stack);
                if (empty($result)) {
                    return true;
                }
            } else {
                if (!empty($stack)) {
                    return true;
                }
            }
        });
    }