0
我已经设置了一个挑战,即创建一个索引器,该索引器将所有单词替换为4个或更多字符,并将它们与单词的使用次数一起存储在数据库中。使用PHP索引文本文件
我必须在4000个txt文件上运行这个索引器。目前,大约需要12-15分钟 - 我想知道是否有人提出加快速度的建议?
目前,我把话说在一个阵列如下:
// ==============================================================
// === Create an index of all the words in the document
// ==============================================================
function index(){
$this->index = Array();
$this->index_frequency = Array();
$this->original_file = str_replace("\r", " ", $this->original_file);
$this->index = explode(" ", $this->original_file);
// Build new frequency array
foreach($this->index as $key=>$value){
// remove everything except letters
$value = clean_string($value);
if($value == '' || strlen($value) < MIN_CHARS){
continue;
}
if(array_key_exists($value, $this->index_frequency)){
$this->index_frequency[$value] = $this->index_frequency[$value] + 1;
} else{
$this->index_frequency[$value] = 1;
}
}
return $this->index_frequency;
}
我认为目前最大的瓶颈是存储在数据库中的单词的脚本。它需要将文件添加到散文表,然后如果表中存在的单词只是在字段中附加essayid(单词的频率),如果单词不存在,则将其添加...
// ==============================================================
// === Store the word frequencies in the db
// ==============================================================
private function store(){
$index = $this->index();
mysql_query("INSERT INTO essays (checksum, title, total_words) VALUES ('{$this->checksum}', '{$this->original_filename}', '{$this->get_total_words()}')") or die(mysql_error());
$essay_id = mysql_insert_id();
foreach($this->index_frequency as $key=>$value){
$check_word = mysql_result(mysql_query("SELECT COUNT(word) FROM `index` WHERE word = '$key' LIMIT 1"), 0);
$eid_frequency = $essay_id . "(" . $value . ")";
if($check_word == 0){
$save = mysql_query("INSERT INTO `index` (word, essays) VALUES ('$key', '$eid_frequency')");
} else {
$eid_frequency = "," . $eid_frequency;
$save = mysql_query("UPDATE `index` SET essays = CONCAT(essays, '$eid_frequency') WHERE word = '$key' LIMIT 1");
}
}
}
谢谢n1313!我努力减少查询数据库的次数。谢谢你的帮助。 – Matt 2010-01-08 12:25:28