/* - * 关键词匹配类
- * @author ylx
- * @packet mipang
- * 使用实例
- * $str = "绿壳蛋鸡撒范德萨下一年，下一年1的洒落开房间卢卡斯地方军";
- * $key = new KeyReplace($str,array("xxxx"=>"sadf","下一年1"=>'http://baidu.com',"下一年"=>'google.com'));
- * echo $key->getResultText();
- * echo $key->getRuntime();
- */
- class KeyReplace
- {
- private $keys = array();
- private $text = "";
- private $runtime = 0;
- private $url = true;
- private $stopkeys = array();
- private $all = false;
- /**
- * @access public
- * @param string $text 指定被处理的文章
- * @param array $keys 指定字典词组array(key=>url,...) url可以是数组，如果是数组将随机替换其中的一个
- * @param array $stopkeys 指定停止词array(key,...) 这里面的词将不会被处理
- * @param boolean $url true 表示替换成链接否则只替换
- * @param boolean $all true 表示替换所有找到的词，否则只替换第一次
- */
- public function __construct($text='',$keys=array(),$url=true,$stopkeys=array(),$all=false) {
- $this->keys = $keys;
- $this->text = $text;
- $this->url = $url;
- $this->stopkeys = $stopkeys;
- $this->all = $all;
- }
/** - * 获取处理好的文章
- * @access public
- * @return string text
- */
- public function getResultText() {
- $start = microtime(true);
- $keys = $this->hits_keys();
$keys_tmp = array_keys($keys); function cmp($a, $b){ - if (mb_strlen($a) == mb_strlen($b)) {
- return 0;
- }
- return (mb_strlen($a) < mb_strlen($b)) ? 1 : -1;
- }
usort($keys_tmp,"cmp"); foreach($keys_tmp as $key){ if(is_array($keys[$key])){ - $url = $keys[$key][rand(0,count($keys[$key])-1)];
- }else
- $url = $keys[$key];
$this->text = $this->r_s($this->text,$key,$url); } - $this->runtime = microtime(true)-$start;
return $this->text; - }
- /**
- * 获取处理时间
- * @access public
- * @return float
- */
- public function getRuntime() {
return $this->runtime; } /** - * 设置关键词
- * @access public
- * @param array $keys array(key=>url,...)
- */
- public function setKeys($keys) {
$this->keys = $keys; } - /**
- * 设置停止词
- * @access public
- * @param array $keys array(key,...)
- */
- public function setStopKeys($keys) {
$this->stopkeys = $keys; } - /**
- * 设置文章
- * @access public
- * @param string $text
- */
- public function setText($text) {
$this->text = $text; } /** - * 用来找到字符串里面命中的关键词
- * @access public
- * @return array $keys 返回匹配到的词array(key=>url,...)
- */
- public function hits_keys(){
- $ar = $this->keys;
- $ar = $ar?$ar:array();
- $result=array();
- $str = $this->text;
- foreach($ar as $k=>$url){
- $k = trim($k);
- if(!$k)
- continue;
- if(strpos($str,$k)!==false && !in_array($k,$this->stopkeys)){
- $result[$k] = $url;
- }
- }
- return $result?$result:array();
- }
/** - * 用来找到字符串里面命中的停止词
- * @access public
- * @return array $keys 返回匹配到的词array(key,...)
- */
- public function hits_stop_keys(){
- $ar = $this->stopkeys;
- $ar = $ar?$ar:array();
- $result=array();
- $str = $this->text;
- foreach($ar as $k){
- $k = trim($k);
- if(!$k)
- continue;
- if(strpos($str,$k)!==false && in_array($k,$this->stopkeys)){
- $result[] = $k;
- }
- }
- return $result?$result:array();
- }
/** - * 处理替换过程
- * @access private
- * @param string $text 被替换者
- * @param string $key 关键词
- * @param string $url 链接
- * @return string $text 处理好的文章
- */
- private function r_s($text,$key,$url){
$tmp = $text; $stop_keys = $this->hits_stop_keys(); $stopkeys = $tags = $a = array(); - if(preg_match_all("#]+>[^<]*]*>#su",$tmp,$m)){
- $a=$m[0];
foreach($m[0] as $k=>$z){ - $z = preg_replace("#\##s","\#",$z);
$tmp = preg_replace('#'.$z.'#s',"[_a".$k."_]",$tmp,1); - }
}; if(preg_match_all("#<[^>]+>#s",$tmp,$m)){ - $tags = $m[0];
- foreach($m[0] as $k=>$z){
- $z = preg_replace("#\##s","\#",$z);
- $tmp = preg_replace('#'.$z.'#s',"[_tag".$k."_]",$tmp,1);
- }
- }
- if(!empty($stop_keys)){
- if(preg_match_all("#".implode("|",$stop_keys)."#s",$tmp,$m)){
- $stopkeys = $m[0];
- foreach($m[0] as $k=>$z){
- $z = preg_replace("#\##s","\#",$z);
- $tmp = preg_replace('#'.$z.'#s',"[_s".$k."_]",$tmp,1);
- }
- }
- }
- $key1 = preg_replace("#([\#\(\)\[\]\*])#s","\\\\$1",$key);
if($this->url) - $tmp = preg_replace("#(?!\[_s|\[_a|\[_|\[_t|\[_ta|\[_tag)".$key1."(?!ag\d+_\]|g\d+_\]|\d+_\]|s\d+_\]|_\])#us",''.$key.'',$tmp,$this->all?-1:1);
- else
- $tmp = preg_replace("#(?!\[_s|\[_a|\[_|\[_t|\[_ta|\[_tag)".$key1."(?!ag\d+_\]|g\d+_\]|\d+_\]|s\d+_\]|_\])#us",$url,$tmp,$this->all?-1:1);
if(!empty($a)){ foreach($a as $n=>$at){ $tmp = str_replace("[_a".$n."_]",$at,$tmp); } } - if(!empty($tags)){
foreach($tags as $n=>$at){ $tmp = str_replace("[_tag".$n."_]",$at,$tmp); } } - if(!empty($stopkeys)){
foreach($stopkeys as $n=>$at){ $tmp = str_replace("[_s".$n."_]",$at,$tmp); } } - return $tmp;
- }
- }
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