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) } 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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