PHP keyword substitution classes (avoid duplicate substitutions, keep and restore original links)

/* * Keyword Matching class * @author YLX * @packet Mipang * Usage Examples * $str = "green shell layer with Edwin van der Sar next year, next year 1 of the spill room Lucas neighbourhoods"; * $key = new Keyreplace ($str, Array ("xxxx" = "SADF", "next year 1" = ' http://baidu.com ', "next year" = ' 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 Specify the article being processed * @param array $keys The specified dictionary phrase array (key=>url,...) URL can be an array, if the array will randomly replace one of them * @param array $stopkeys Specify the Stop Word array (key,...) the words inside will not be processed * @param boolean $url true means replace with link or replace only * @param boolean $all True to replace all found words, or replace only the first time */ Public function __construct ($text = ", $keys =array (), $url =true, $stopkeys =array (), $all =false) { $this->keys = $keys; $this->text = $text; $this->url = $url; $this->stopkeys = $stopkeys; $this->all = $all; } /** * Get a good working article * @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; } /** * Get processing time * @access Public * @return Float */ Public Function GetRuntime () { return $this->runtime; } /** * Set Keywords * @access Public * @param array $keys Array (Key=>url,...) */ Public Function SetKeys ($keys) { $this->keys = $keys; } /** * Set Stop words * @access Public * @param array $keys Array (key,...) */ Public Function Setstopkeys ($keys) { $this->stopkeys = $keys; } /** * Settings article * @access Public * @param string $text */ Public Function SetText ($text) { $this->text = $text; } /** * Used to find the keyword hit in the string * @access Public * @return Array $keys returns the match to the word 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 (); } /** * Used to find the stop word of the string inside the hit * @access Public * @return Array $keys returns the match to the word 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 (); } /** * Handling the replacement process * @access Private * @param string $text replaced by * @param string $key Keywords * @param string $url link * @return String $text well-handled article */ Private Function r_s ($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); } } } $key 1 = preg_replace ("# ([\#\ (\) \[\]\*]) #s", "\\\\$1", $key); if ($this->url) $tmp = Preg_replace ("# (?! \[_s|\[_a|\[_|\[_t|\[_ta|\[_tag) ". $key 1." (?! Ag\d+_\]|g\d+_\]|\d+_\]|s\d+_\]|_\]) #us ",". $key. ", $tmp, $this->all?-1:1); Else $tmp = Preg_replace ("# (?! \[_s|\[_a|\[_|\[_t|\[_ta|\[_tag) ". $key 1." (?! Ag\d+_\]|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; } } Copy Code

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