arrays - Checking two strings for approximate match in PHP -


i'm trying check approximately similarity of strings.

here criteria use that.

1) order of words important 2) words can have 80% of similarity.

example:

$string1 = "how cost me" //string in vocabulary (all "right" words here) $string2 = "how costs "   //"costs" instead "cost" -is deliberate mistake (user input);

algoritm: 1) check similarity of words , create clean string "right" words (according order appear in vocabulary). output: "how cost" 2) create clean string "right" words in order appear in user input. output: "how cost it" 3)compare 2 outputs - if not same - return no, else if same return yes.

any suggestions?

i started write code, i'm not familiar tools in php, don't know how rationally , efficiently.

it looks more javascript/php

$string1="how cost me" ; $string2= "how costs it";  function comparestrings($string1, $string2) {      if (strlen($s1)==0 || strlen($s2)==0) {         return 0;     }      while (strpos($s1, "  ")!==false) {         $s1 = str_replace("  ", " ", $s1);     }     while (strpos($s2, "  ")!==false) {         $s2 = str_replace("  ", " ", $s2);     }      $ar1 = explode(" ",$s1);     $ar2 = explode(" ",$s2);     $array1 = array_flip($ar1);     $array2 = array_flip($ar2);     $l1 = count($ar1);     $l2 = count($ar2);   $meaning="";     $rightorder=""      ($i=0;$i<=$l1;$i++) {           ($j=0;$j<=$l2;$j++) {           $k=   similar_text($array1[i], $array2[j], $perc).php_eol; if ($perc>=85) {     $meaning=$meaning." ".$array1[j]; //generating string of first output     $rightorder[i]= array1[i]; //generating array second output  }          }       }  }

the idea thet $meaning "how cost" , $rightorder 

$rightorder[0]='how' $rightorder[1]='much' $rightorder[2]='' $rightorder[3]='cost' $rightorder[4]='it'

after somehow onvert string "how cost it"

and compare two.

if ("how cost it"=="how cost") return true; else return false.

your problem belongs science of nlp (natural language processing).

each issue mentioned in question has filed of study of own:

  • splitting string words tokenization. seems trivial in english, not in other languages, german. there problem of how parse punctuation marks.

  • creating "right words" called stemming. there number of tools that. if words in english may try porter stemming algorithm. other languages may have own stemming techniques, dictionary algorithm exists.

  • calculating similarity of string based on individual word occurrences called "cosine similarity". there number of other techniques. there alse problem od synonymy , polysemy

i hope problem mixture of above-mentioned problems.


Comments

Post a Comment

Popular posts from this blog

jquery - How can I dynamically add a browser tab? -

since using iframes house external pages are, accounts "not preferred method" , disallowed sites (flickr, one), want dynamically generate browser tabs. e.g., when user submits form, want dynamically generate tab on browser in response submitted. e.g., might want add new tab url like: http://www.bigsurgarrapata.com/contact how in jquery? you want form target attribute action attribute. http://www.w3schools.com/tags/att_form_target.asp browsers have ultimate control on result of target attribute open new tab value of _blank. <form action="contact_submit.php" target="_blank" method="post">
Read more

keyboard - C++ GetAsyncKeyState alternative -

i using windows.h library's getasynckeystate function define key pushed on keyboard . here program returns int value of pushed key example. #include <iostream> #include <windows.h> using namespace std; int main (){ char i; for(i=8;i<190;i++){ if(getasynckeystate(i)== -32767){ cout<<int (i)<<endl; } } return 0; } but trying make opengl simple game , function appeared slow . there function not need cycle 180 times , if statement . thanks you're trying make opengl game, you're going use glfw. if that's case can away using glfwgetkey() such: if (glfwgetkey(glfw_key_up) == glfw_press) {...} if (glfwgetkey(glfw_key_down) == glfw_press) {...} that method nicely explained in tutorial 6 opengl-tutorial.org . should start first tutorial of beginners tutorials , later intermediate tutorials . if you're going make win32 window can listen wm_keydown or wm_keyup messages , virtua...
Read more

android - java.net.UnknownHostException(Unable to resolve host “URL”: No address associated with hostname) -

i developing app testing asp.net webservice in android.for simple webservice adding 2 numbers used.where numbers passed parameters.the result in dialogue.the webserver works in local. when application runs following result exception.i provided internet permission in manifest. java.net.unknownhostexception(unable resolve host “ http://url.com/ ”: no address associated hostname) my code given below main activity public static string rslt=""; /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); button b1=(button)findviewbyid(r.id.button1); final alertdialog ad=new alertdialog.builder(this).create(); b1.setonclicklistener(new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub try { ...
Read more