Code Examples -> Client classes for Dictionary servers UPDATED: 2000-06-06

	Submit Your Code
	SEO Monitor
	UpTime Monitor
	PHP Code Contest
	My Favorite Examples
	My Favorite Articles
	Update Your Profile

More Weber Sites
	PHP Code Search
	Web Development Forums
	Learn MySQL Playing Trivia
	PHPBB2 Templates
	Web Development Index
	PHP Web Logs (BLogs)
	Web Development Resources
	Web Development Content

Recommended Links
	PHPClasses
	PHP Editor
	PHP Jobs
	Vision.To Design
	Ajax Tutorials
	PHP Programming Help
	PHP/MySQL Programming
	Webmaster Resources
	Webmaster Forum
	XML meta language
	website builder

Recommended
	Submit Site
	Forex Trading Online forex trading platform


BACK		ADD A COMMENT		SEND TO A FRIEND		ADD TO MY FAVORITES		ADD CODE EXAMPLES		PRINT

PHP Code Examples

Title :	Client classes for Dictionary servers UPDATED: 2000-06-06
Categories :	Network, Search, Complete Programs, PHP Classes, PHP	Jesus Castagnetto
Date :	Jun 06th 2000
Grade :	2 of 5 (graded 3 times)
Viewed :	6655
File :	No file for this code example.
Images :	No Images for this code example.

Search :	More code by Jesus Castagnetto
Action :	Grade This Code Example
Tools :	My Examples List

Code

This code supersedes #1585 and #1588
A base class and 2 derivated classes (pkg.dict.php) to generate clients for
dictionary servers that follow the DICT protocol (RFC 2229), such as the
server at dict.org

Included also 2 example of query interfaces generated using this classes, one
performs a simple search (simplesearch.php), and the other shows how to get
information from the dictionary server and use that to generate a form
allowing for more complex searches (extendedsearch.php).

[UPDATE: 2000/06/05] Fixed some bugs reported by Davor Cengija
<davor@croart.com> and found another bug related to URLs referred in the
definition that are also marked as crossrefence terms

[UPDTATE: 2000/06/06] Check for duplicates when creating the links, and
modified the external URLs regex to recognize more protocols, as well as
eliminate crossrefences to RFC's

NOTE: Separate the 3 files before using the examples.

::::::::::::::
pkg.dict.php
::::::::::::::
<?php

/*
* This set of classes implement a subset of the DICT protocol
* and it is meant to be use to generate clients that
* query a DICT server
*
* By default, the class uses the dict.org server in
* the port 2628.
*
* (c) 2000, Jesus M. Castagnetto <jmcastagnetto@zkey.com>
*
* License: GPL, see http://www.gnu.org/copyleft/gpl.txt
*
* Changes:
*
* 2000/06/04 - added the correct link to the GPL license
* 2000/06/05 - added the in_array() method to the base class
* from a suggestion by Davor Cengija <davor@croart.com>
* who pointed out that PHP gained the in_array()
* function in 3.0.12, and 4.0.0
*/

//============================================================

/*
* class DictBase
*
* Base class for implementing the DICT protocol to communicate
* with dictionary servers. It defaults to dict.org and port 2628.
*/

class DictBase {

        var $host = "dict.org";
        var $port = "2628";
        var $max_length = 6144; // 1024 * 6 to cover UTC8 chars
        var $socket;

        var $valid_codes =
                array (
                        110, 111, 112, 113, 114, 130, 150, 151, 152,
                        210, 220, 221, 230, 250,
                        330,
                        420, 421,
                        500, 501, 502, 503, 530, 531, 532,
                        550, 551, 552, 554, 555
                );

        var $return_code = array();

        function DictBase() {
                // empty constructor
        }

        function set($var, $val) {
                $this->$var = $val;
        }

        function get($var) {
                return $this->$var;
        }

        function parse_code($str) {
                ereg("^([0-9]{3}) (.+)", $str, &$reg);
                $error = ( $reg[1] >= 300 );
                $this->return_code = array(        "error"=>$error,
                                                                        "code"=>$reg[1],
                                                                        "desc"=>$reg[2]);
        }

        function is_valid_code() {
                return $this->in_array($this->return_code["code"], $this->valid_codes);
        }

        function is_error_code() {
                return $this->return_code["error"];
        }

        function print_code() {
                $out = $this->is_error_code() ? "<ERROR> " : "";
                $out .= "[".$this->return_code["code"]."] ".$this->return_code["desc"]."\n";
                echo $out;
        }

        function connect() {
                $fp = fsockopen($this->host, $this->port, &$errno, &$errstr, 90);
                if (!$fp) {
                        echo "Cannot connect: ".$errno." = ".$errstr."\n";
                        exit;
                } else {
                        $this->socket = $fp;
                }
        }

        function close() {
                fputs($this->socket, "QUIT\r\n");
                $tmp = fgets($this->socket, $this->max_length);
                fclose($this->socket);
        }

        function read_data() {
                while ($read = fgets($this->socket, $this->max_length)) {
                        if (ereg("^\.\r\n$",$read))
                                break;
                        $out .= $read;
                }
                return $out;
        }

        // To support old PHP3 versions ( older than 3.0.12 )
        // A point I forgot and Davor Cengija reminded me about
        function in_array($element, $arr) {
                // figure out version
                list($major, $minor, $release) = explode(".", phpversion());
                if (($major == 3 && $relesase >= 12) || $major == 4) {
                        return in_array($element, $arr);
                } else {
                        // assumes that we want to compare element value
                        while (list($key, $val) = each($arr)) {
                                if ($val == $element)
                                        return true;
                        }
                        return false;
                }
        }

} // end of base class Dict

//============================================================

/*
* Class DictServerInfo
*
* To generate objects containing DICT server information.
* Extends the DictBase class.
*/

class DictServerInfo extends DictBase {

        var $info = array();

        function DictServerInfo($host="", $port="", $extended=false) {
                $this->init($host, $port, $extended);
        }

        function init($host, $port, $extended) {
                if ($host)
                        $this->set("host", $host);
                if ($port)
                        $this->set("port", $port);

                $this->connect();

                // get connection response line
                $line = fgets($this->socket, $this->max_length);
                $this->parse_code($line);
                if ($this->is_error_code()) {
                        $this->print_code();
                        exit;
                }
                // extract capabilities info from response line
                ereg("^[0-9]{3} (.*) <([^<]*)> <(.*)>", $line, &$reg);
                $this->info["signature"] = $reg[1];
                $this->info["capabilities"] = explode(".", $reg[2]);
                $this->info["msg-id"] = $reg[3];

                // get description on the server and store verbatim
                $this->info["server"] = $this->show("SERVER");

                // get the dbs and strategies for this server
                $dbs = $this->show("DB");
                $this->store("databases",$dbs);
                $strats = $this->show("STRAT");
                $this->store("strategies",$strats);

                // get the description of each database
                // if extended info is requested
                if ($extended)
                        $this->get_dbs_info();

                // close the connection
                $this->close();
                }

        function show($str) {
                fputs($this->socket, "SHOW ".$str."\r\n");
                $tmp = chop(fgets($this->socket, $this->max_length));
                $tmp2 = explode (" ", $tmp);
                if ($str == "DB")
                        $this->info["num_dbs"] = (int) $tmp2[1];
                if ($str == "STRAT")
                        $this->info["num_strat"] = (int) $tmp2[1];
                $data = $this->read_data();
                $tmp = fgets($this->socket, $this->max_length);
                return $data;
        }

        function store($str, $data) {
                $arr = explode("\r\n", $data);
                $out = array();
                for ($i=0; $i<count($arr); $i++) {
                        if (chop($arr[$i]) == "")
                                continue;
                        ereg("^([^ ]+) \"?([^\"]+)\"?", $arr[$i], &$reg);
                        $out[$reg[1]] = $reg[2];
                }
                $this->info[$str] = $out;
        }

        function get_dbs_info() {
                $ndb = $this->info["num_dbs"];
                $dbs = $this->info["databases"];
                $dbinfo = array();
                while (list($k, $v) = each($dbs)) {
                        $dbinfo[$k] = $this->show("INFO ".$k);
                }
                $this->info["dbs_desc"] = $dbinfo;

        }

        function get_info ($str) {
                return $this->info[$str];
        }

} // end of class DictServerInfo

//============================================================

/*
* class DictQuery
*
* To create query objects to search a DICT server
*/

class DictQuery extends DictBase {

        var $term = "";
        var $method = "exact";
        var $searchdb = "*";
        var $query_type = "DEFINE";
        var $valid_methods = array ("exact", "prefix", "substring", "suffix",
                                                                "re", "regexp", "soundex", "lev");
        var $result = array();
        var $numres = 0;

        function DictQuery($host="", $port="") {
                $this->init($host, $port);
        }

        function init($host, $port) {
                if ($host)
                        $this->set("host", $host);
                if ($port)
                        $this->set("port", $port);

                $this->connect();
                // get connection response line
                $line = fgets($this->socket, $this->max_length);
                $this->parse_code($line);
                if ($this->is_error_code()) {
                        $this->print_code();
                        exit;
                }
        }

        function search($term, $method, $db) {
                if (!$this->is_method($method)) {
                        echo "**ERROR** invalid method: ".$method."\n";
                        exit;
                }
                $this->clear_results();
                $this->term = $term;
                $this->method = $method;
                $this->searchdb = $db;

                $query = ($method=="exact") ? "DEFINE $db " : "MATCH $db $method ";
                $query .= "\"".$term."\"\r\n";

                fputs($this->socket, $query);
                $line = fgets($this->socket, $this->max_length);
                ereg("^[0-9]{3} ([0-9]+) .+", $line, &$reg);
                $this->numres = (int) $reg[1];

                if ($method != "exact") {
                        $rlist = $this->read_data();
                        $this->result = explode("\r\n", chop($rlist));
                } else {
                        $regex = "^[0-9]{3} \"([^\"]+)\" ([^\" ]+) \"([^\"]+)\"";
                        $allres = array();
                        $entry = array();
                        for ($i=0; $i<$this->numres; $i++) {
                                $line = chop(fgets($this->socket, $this->max_length));
                                if ($line == "")
                                        continue;
                                ereg($regex, $line, &$reg);
                                $entry["term"] = $reg[1];
                                $entry["dbcode"] = $reg[2];
                                $entry["dbname"] = $reg[3];
                                $entry["definition"] = $this->read_data();

                                $this->result[$i] = $entry;
                        }
                }
        }

        function define($term, $db="*") {
                $this->search($term, "exact", $db);
                $this->close();
        }

        function match($term, $method="prefix", $db="*") {
                $this->search($term, $method, $db);
                $this->close();
        }

        function is_method($method) {
                return $this->in_array($method, $this->valid_methods);
        }

        function clear_results() {
                $this->numres = 0;
                $this->result = array();
        }

} // end of class DictQuery

?>

::::::::::::::
simplesearch.php
::::::::::::::

<?php
        $start=time();
        include ("./pkg.dict.php");
?>
<html>
<head>
<title>Simple Form to Query dict.org</title>
</head>
<body>
Search the dict.org server
<p>
<form action="<?php echo $PHP_SELF ?>" method="post">
<input type="text" name="query_term" size="60"
<?php
if ($query_term)
        echo "value=\"".$query_term."\"";
?>
><br>
<input type="hidden" name="database" value="*">
<input type="hidden" name="strategy" value="exact">
<input type="submit" name="submit" value=" Search ">
<input type="reset" name="reset" value=" Clear form input ">
<hr>
<?php

// check if element is in the array

function inArray($element, $arr) {
        // figure out version
        list($major, $minor, $release) = explode(".", phpversion());
        if (($major == 3 && $relesase >= 12) || $major == 4) {
                return in_array($element, $arr);
        } else {
                // assumes that we want to compare element value
                while (list($key, $val) = each($arr)) {
                        if ($val == $element)
                                return true;
                }
                return false;
        }
}

// remove duplicates from array
// and eliminate the patterns in $nolinks

function cleanArray($arr) {
        $nolinks = "rfc:";
        $out = array();
        for ($i=0; $i<count($arr); $i++)
                if (!inArray($arr[$i], $out) && !ereg($nolinks, $arr[$i]))
                        $out[] = $arr[$i];
        return $out;
}

//make the links to other words in the description

function mkLinks($str, $db) {
        global $PHP_SELF;

        // modified the regexes to fix the bug reported by <davor@croart.com>
        $patt = "\{+([^{}]+)\}+";
        $regex = "<b>\\1</b>";
        $out = ereg_replace($patt, $regex, $str);
        $patt = "/\{+([^{}]+)\}+/";
        preg_match_all($patt, $str, &$reg);
        $link = $reg[1];
        // clean up array
        $link = cleanArray($link);
        if (count($link) > 0)
                $out .= "<i>See also:</i>\n";

        for ($i=0; $i<count($link); $i++) {
                // added the line below to fix a second bug reported by <davor@croart.com>
                $link[$i] = ereg_replace("[[:space:]]+", " ", $link[$i]);
                // observed myself another bug with references to URLs - JMC
                // check if it is a HTTP URL or a crossrefence
                $protocols = "(http|https|ftp|telnet|gopher)://|(mailto|news):";
                if (ereg($protocols, $link[$i])) {
                        // parse the link and mark it using <>
                        $prot1 = "^((mailto|news):.+)$";
                        $prot2 = "(http|https|ftp|telnet|gopher)://";
                        $prot2 = "^(.*) *$(".$prot2.".+)$$";
                        if (ereg($prot1, $link[$i], &$regurl)) {
                                list ($tmp, $url) = $regurl;
                                $desc = $url;
                        } elseif (ereg($prot2, $link[$i], &$regurl)) {
                                list ($tmp, $desc, $url) = $regurl;
                                if ($desc == "")
                                        $desc = $url;
                        }
                        $out .= "<<a href=\"".chop($url)."\" target=\"_blank\">";
                        $out .= chop($desc)."</a>> ";
                } else {
                        $out .= "[<a href=\"".$PHP_SELF."?query_term=";
                        $out .= urlencode($link[$i])."&database=".urlencode($db);
                        $out .= "&strategy=exact\">".$link[$i]."</a>] ";
                        if (($i % 5) == 0 && $i > 0)
                                $out .= "\n";
                }
        }
        $out .= "\n";
        return $out;
}

function parr($arr) {
        echo "<ul>";
        while (list($k,$v) = each($arr)) {
                if (gettype($v) == "array") {
                        echo "<ul>";
                        echo "* $k , new array*<br>";
                        parr($v);
                        echo "</ul>";
                } else {
                        echo "$k = $v<br>";
                }
        }
        echo "</ul>";
}

// perform a query to the server

function doQuery($str, $db, $strategy) {
        global $PHP_SELF;
        $query = new DictQuery();
        $query->define($str, $db);
        $n = $query->get("numres");
        $res = $query->get("result");
        $out = "<b>Found ".count($res);
        $out .= (count($res)==1) ? " hit" : " hits";
        $out .= "</b> - <i>Term: ".$str.", Database: ".$db.", Strategy: ".$strategy;
        $out .= "</i><br>\n<dl>\n";
        for ($i=0; $i<count($res); $i++) {
                $entry = $res[$i];
                $out .= "<dt>[".($i + 1)."] : ".$entry["dbname"]."</dt>\n";
                $out .= "<dd><pre>".mkLinks($entry["definition"], $db)."</pre></dd>\n";
        }
        $out .= "</dl>";
        return $out;
}

if ($query_term){
        $out = doQuery($query_term, $database, $strategy);
        echo $out."\n<hr>\n";
}
?>
Last accessed:
<?php
$end = time();
echo date("Y/m/d H:i:s",time());
echo " [Total processing time: ".($end - $start)." seconds]";
?>
</body>
</html>

::::::::::::::
extendedsearch.php
::::::::::::::


<?php

        $start=time();
        include ("./pkg.dict.php");
?>
<html>
<head>
<title>Extended autogenerated form to query dict.org</title>
</head>
<body>
Search the dict.org server
<p>
<form action="<?php echo $PHP_SELF ?>" method="post">
<input type="text" name="query_term" size="60"
<?php
if ($query_term)
        echo "value=\"".$query_term."\"";
?>
><BR>
<?php

/*
* I will autogenerate the form in the code below
* You might want to make a static form to avoid
* the overhead of the on-the-fly HTML code generation
* and the query to the DICT server
*/

// functions to make the form

function mkSelect($name, $nopt, $options, $default) {
        $out = "<select name=\"".$name."\">\n";
        list($defkey,$defval) = each($default);
        $out .= "<option value=\"".$defkey."\" selected>".$defval."</option>\n";
        while (list($key,$val) = each($options)) {
                if ($key != $defkey)
                        $out .= "<option value=\"".$key."\">".$val."</option>\n";
        }
        $out .= "</select>\n";
        return $out;
}

function printForm($s) {
        $ndbs = $s->get_info("num_dbs");
        $dbs = $s->get_info("databases");
        $nstrats = $s->get_info("num_strats");
        $strategies = $s->get_info("strategies");
        $out = "<BR>Use database:<BR>\n";
        $out .= mkSelect("database", $ndbs, $dbs, array("*"=>"Any"));
        $out .= "<BR>Type of Search:<BR>\n";
        $out .= mkSelect("strategy", $ndbs, $strategies, array("exact"=>"Exact Search"));
        echo $out;
}

// get non-extended info from the server
$server = new DictServerInfo();

// print the form

printForm($server);

?>
<br>
<input type="submit" name="submit" value=" Search ">
<input type="reset" name="reset" value=" Clear form input ">
<hr>
<?php

/*
* If there was a query, this part will show the result
*/

// check if element is in the array

function inArray($element, $arr) {
        // figure out version
        list($major, $minor, $release) = explode(".", phpversion());
        if (($major == 3 && $relesase >= 12) || $major == 4) {
                return in_array($element, $arr);
        } else {
                // assumes that we want to compare element value
                while (list($key, $val) = each($arr)) {
                        if ($val == $element)
                                return true;
                }
                return false;
        }
}

// remove duplicates from array
// and eliminate the patterns in $nolinks

function cleanArray($arr) {
        $nolinks = "rfc:";
        $out = array();
        for ($i=0; $i<count($arr); $i++)
                if (!inArray($arr[$i], $out) && !ereg($nolinks, $arr[$i]))
                        $out[] = $arr[$i];
        return $out;
}

//make the links to other words in the description

function mkLinks($str, $db) {
        global $PHP_SELF;

        // modified the regexes to fix the bug reported by <davor@croart.com>
        $patt = "\{+([^{}]+)\}+";
        $regex = "<b>\\1</b>";
        $out = ereg_replace($patt, $regex, $str);
        $patt = "/\{+([^{}]+)\}+/";
        preg_match_all($patt, $str, &$reg);
        $link = $reg[1];
        // clean up array
        $link = cleanArray($link);
        if (count($link) > 0)
                $out .= "<i>See also:</i>\n";

        for ($i=0; $i<count($link); $i++) {
                // added the line below to fix a second bug reported by <davor@croart.com>
                $link[$i] = ereg_replace("[[:space:]]+", " ", $link[$i]);
                // observed myself another bug with references to URLs - JMC
                // check if it is a HTTP URL or a crossrefence
                $protocols = "(http|https|ftp|telnet|gopher)://|(mailto|news):";
                if (ereg($protocols, $link[$i])) {
                        // parse the link and mark it using <>
                        $prot1 = "^((mailto|news):.+)$";
                        $prot2 = "(http|https|ftp|telnet|gopher)://";
                        $prot2 = "^(.*) *$(".$prot2.".+)$$";
                        if (ereg($prot1, $link[$i], &$regurl)) {
                                list ($tmp, $url) = $regurl;
                                $desc = $url;
                        } elseif (ereg($prot2, $link[$i], &$regurl)) {
                                list ($tmp, $desc, $url) = $regurl;
                                if ($desc == "")
                                        $desc = $url;
                        }
                        $out .= "<<a href=\"".chop($url)."\" target=\"_blank\">";
                        $out .= chop($desc)."</a>> ";
                } else {
                        $out .= "[<a href=\"".$PHP_SELF."?query_term=";
                        $out .= urlencode($link[$i])."&database=".urlencode($db);
                        $out .= "&strategy=exact\">".$link[$i]."</a>] ";
                        if (($i % 5) == 0 && $i > 0)
                                $out .= "\n";
                }
        }
        $out .= "\n";
        return $out;
}

// Perform a query to the server

function doQuery($str, $db, $strategy) {
        global $PHP_SELF;
        $query = new DictQuery();
        if ($strategy == "exact") {
                $query->define($str, $db);
        } else {
                $query->match($str, $strategy, $db);
        }
        $n = $query->get("numres");
        $res = $query->get("result");
        $out = "<b>Found ".count($res);
        $out .= (count($res)==1) ? " hit" : " hits";
        $out .= "</b> - <i>Term: ".$str.", Database: ".$db.", Strategy: ".$strategy;
        $out .= "</i><br>\n<dl>\n";
        for ($i=0; $i<count($res); $i++) {
                $entry = $res[$i];
                if ($strategy == "exact") {
                        $out .= "<dt>[".($i + 1)."] : ".$entry["dbname"]."</dt>\n";
                        $out .= "<dd><pre>".mkLinks($entry["definition"], $db)."</pre></dd>\n";
                } else {
                        $match = explode(" ",chop($entry));
                        $match_term = str_replace("\"", "", $match[1]);
                        $out .= "<dt>[". ($i + 1 ) . "] : ";
                        $out .= "<A HREF=\"".$PHP_SELF."?query_term=".urlencode($match_term);
                        $out .= "&database=".urlencode($db);
                        $out .= "&strategy=exact\">";
                        $out .= $match_term."</a></dt>\n";
                        $out .= "<dd> Database: ".$match[0]."</dd>";
                }
        }
        $out .= "</dl>";
        return $out;
}

// if there was a query ...
if ($query_term){
        $out = doQuery($query_term, $database, $strategy);
        echo $out."\n<hr>\n";
}
?>
Last accessed:
<?php
$end = time();
echo date("Y/m/d H:i:s",time());
echo " [Total processing time: ".($end - $start)." seconds]";
?>
</body>
</html>

Related Code Examples

	Expose - PHP template engine, supports server and client-sided caching,a plugin system, multiple languages, template script language is based on PHP itself. Categories : PHP, PHP Classes, Templates, Complete Programs
	Searches through a local INN server's discussions Categories : Search, Complete Programs, PHP
	Class for sending mail with MIME attachments in multipart format using external sendmail, mimencode and zip Categories : Email, Network, PHP, PHP Classes
	free, search engine, indexing, system, information, web, ftp, http, free, software, cgi, php, MySQL, database, php3, FreeBSD, Linux, Unix, UdmSearch Categories : MySQL, Complete Programs, PHP, Databases, Search
	Simple Mini Poll class library (SimPoll) Categories : PHP, PHP Classes, Databases, MySQL, Complete Programs
	DBE - Database Expander: Edit PostgreSQL individual database tables online via your Web browser! Categories : PostgreSQL, Complete Programs, Databases, PHP Classes, PHP
	whois domain name lookup dns url Categories : PHP, Search, Network
	An email validation script that actually checks against the recipient's mail server. Categories : Email, Complete Programs, PHP, Network, Debugging
	Search and Replace Text : Searches Files for Specified Text and Replaces It by a Given Text Categories : PHP, PHP Classes, Search, Filesystem
	Sample usage of IPv6 and IPv4 with PHP Categories : PHP, PHP Classes, Network
	Create and restore backup of MySQL databases Categories : MySQL, Databases, PHP, PHP Classes, Complete Programs
	Class that allows the PHP developer to establish connections with a POP3 mail server amd be able to list, retrieve and delete mail messages from a given mail box. Categories : Network, Email, PHP, PHP Classes
	simple shopping cart for php3 Categories : PHP, PHP Classes, Complete Programs, Ecommerce
	base class to query the whois database Categories : Network, PHP, PHP Classes
	DirtSearch Version 3.5 full function robust PHP and MySQL (and other databases) Site or Web Wide Search Engine Categories : PHP, MySQL, Complete Programs, Search, Databases

User Comments

	chatdev dotcom wrote :1101 `Excellent program, I am very surprised not to see a flood of comments on this program, it should be noticed. Thank you for the source. It works perfectly. =) -Rick`