Php keyword replacement class (avoid repeated replacement, retain and restore the original link)

Php keyword replacement class (avoid repeated replacement, retain and restore the original link)

/* * Keyword Matching class * @ Author ylx * @ Packet mipang * Use instances * $ Str = "the green shell egg zafdensa's local army in the room will be scattered and scattered in the next year and in the next year "; * $ 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 specifies the article to be processed * @ Param array $ keys specifies the dictionary phrase array (key => url,...) url can be an array. if it is an array, a random replacement * @ Param array $ stopkeys specify the stop word array (key,...). the words in this field will not be processed. * @ Param boolean $ url true: replace the value with a link. otherwise, replace the value with only one link. * @ Param boolean $ all true indicates that all words found are replaced; otherwise, only the first time is replaced. */ 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 the processed articles * @ 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; } /** * Obtain the 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 the stop word. * @ Access public * @ Param array $ keys array (key ,...) */ Public function setStopKeys ($ keys ){ $ This-> stopkeys = $ keys; } /** * Set an article * @ Access public * @ Param string $ text */ Public function setText ($ text ){ $ This-> text = $ text; } /** * Used to find the hit keywords in the string * @ Access public * @ Return array $ keys returns the matched 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 hit in the string * @ Access public * @ Return array $ keys returns the matched 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 * @ Param string $ key keyword * @ Param string $ url link * @ Return string $ text-processed articles */ 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 + _ \] | s \ d + _ \] | _ \]) # us ", ''. $ key. '', $ tmp, $ this-> all? -1:1 ); Else $ Tmp = preg_replace ("#(?! \ [_ S | \ [_ a | \ [_ | \ [_ t | \ [_ ta | \ [_ tag) ". $ key1 ."(?! Ag \ d + _ \] | g \ d + _ \] | s \ d + _ \] | _ \]) # us ", $ url, $ tmp, $ this-> all? -1:1 ); If (! Empty ($ )){ Foreach ($ a as $ n => $ ){ $ Tmp = str_replace ("[_ a". $ n. "_]", $ at, $ tmp ); } } If (! Empty ($ tags )){ Foreach ($ tags as $ n =>$ ){ $ Tmp = str_replace ("[_ tag". $ n. "_]", $ at, $ tmp ); } } If (! Empty ($ stopkeys )){ Foreach ($ stopkeys as $ n => $ ){ $ Tmp = str_replace ("[_ s". $ n. "_]", $ at, $ tmp ); } } Return $ tmp; } }