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  Classes of BasicA  >  Search Engine Class  >  bsearch.php  >  Download  
File: bsearch.php
Role: ???
Content type: text/plain
Description: Main Searching Controller "\phpsearch\bsearch.php"
Class: Search Engine Class
Author: By
Last change:
Date: 13 years ago
Size: 5,611 bytes
 

Contents

Class file image Download
<?php

	include("xmlbasica.lib.php");

	/* $SearchTerm = "basica yukari programming visual japanese"; */

	if (!isset($SearchTerm)) $SearchTerm = "SEARCH-TERM-NOT-SET";
	if (!isset($NoCharDisp)) $NoCharDisp = 15;  
	if (!isset($SearchMode)) $SearchMode = 0; /* 0: word by word (delimited by space) | 1: whole phrase       */
	if (!isset($WrdXplicit)) $WrdXplicit = 1; /* 0: "basic" would return for "basica" | 1: basic is iif basic */

	
	/*
	   This function serves to tell if a character is a alphabet, number or neither
	 */
	function notAlphaNumeric($charDataIn) { 
	
		if (((ord($charDataIn) >= 97) && (ord($charDataIn) <= 122)) || ((ord($charDataIn) >= 48) && (ord($charDataIn) <= 57))) {
			return false;
		} else {
			return true;
		}
		
	}
	

	/*
	    Check if a certain instance of a string exists in another bigger string.
	 */
	function TermExists($TString, $Term, &$Pos) {
	
		$RetVal = false;
		
		if (trim(strval(strpos($TString, $Term))) != "") {
			$RetVal = true;
			$Pos    = strpos($TString, $Term); 
		}
		
		return $RetVal;
		
	}
	
	
	/*
	    function to remove HTML tags.
	 */
	function RemoveHTMLTags($strDataIn) {
		
		$Temp = "";
		
		for ($i = 0; $i < strlen($strDataIn); $i++) {
			if (substr($strDataIn, $i, 1) == "<") $Add = false;
			if ($Add) $Temp .= substr($strDataIn, $i, 1);
			if (substr($strDataIn, $i, 1) == ">") $Add = true;
		}
		
		return $Temp;
		
	}
	

	$SearchDB    = "search-db.xml";
	$SearchData  = XML_DBarrayDump($SearchDB, $DB, $REC, $cntREC, $cntFLD, $FLD);
	$SearchTerm  = strtolower(trim($SearchTerm));
	$SearchMatch = false;
	$NumMatches  = 0;
	
	if ($SearchMode == 0) $TermArray  = explode(" ", $SearchTerm);
	if ($SearchMode == 1) $TermArray[0] = $SearchTerm; 

	print "<hr color=#000080><font color=#000080><b>Search Results<br> -* for:&nbsp;&nbsp;";
	
	for ($i = 0; $i < sizeof($TermArray); $i++) {
		print "|&nbsp;&nbsp;\"" . $TermArray[$i] . "\"&nbsp;&nbsp;";
	}                           
	
	print "|</b></font><hr color=#000080><br>";


	for ($i = 0; $i < $cntREC; $i++) {
		
		$TFile   = $SearchData[$i][1]; 	
		$fp      = file($TFile);
		$strFile = implode($fp, "");
		$strFile = RemoveHTMLTags($strFile);
		$bakFile = $strFile;
		$strFile = strtolower($strFile);
		
		$Prev = -1;

		for ($j = 0; $j < sizeof($TermArray); $j++) {
		
			if (TermExists($strFile, $TermArray[$j], $Pos)) { 

				/* this condition checks that sandwiching the search term is 2 spaces and no 
				 * other characters makeing an explicit search                               
				 * --------------------------------------------------------------------------
				 * However a little switch is made and that is the $WrdXplicit var if this   
				 * variable is given a preset value of 0 then the search can then be optioned
				 * not to be explicit meaning "basic" could return "basica". 
				 *
				 * SLIGHT CHANGE: The 2 characters sandwiching the search term must not be 
				 * alpha numeric characters. ie they can be punctuations.
				 *
				 * YET ANOTHER CHANGE: Here is another note the search initially changes
				 * all the case to lower to facilitate the operations but had not made it
				 * such that the state is just what it is in the document. creating a 
				 * backup var for $strFile - $bakFile the operation has been perfectly 
				 * handled.
 				 */
				
				if (((notAlphaNumeric(substr($strFile, $Pos - 1, 1))) && (notAlphaNumeric(substr($strFile, $Pos + strlen($TermArray[$j]), 1)))) || ($WrdXplicit == 0)) {
				
					$SearchMatch = true;

					/* if the previous successful result return came from the same page 
					 * there is no need to print the header another time.
					 */
					if ($Prev != $i) {
						print "<b>[<a href=" . $SearchData[$i][0] . "><font color=#000000>" . $SearchData[$i][2] . "</font></a>]</b><br>";
						$NumMatches += 1;
					}

					$LEADING_CHARS_START = $Pos - $NoCharDisp;
					$LEADING_CHARS_LEN = $NoCharDisp;
					$TRAILING_CHARS_START = $Pos + strlen($TermArray[$j]); 
					$TRAILING_CHARS_LEN = $NoCharDisp;          
				
					print "<font color=#008000><b>" . $TermArray[$j] . ": </b></font>";

					/* if the user set the number of leading characters to show to a number 
					 * such that the backward tracing of characters go before 0 it would have
					 * an unsightly ouput in php... therefore create the limit here.
					 */
				
					if ($Pos < $NoCharDisp) {
						$LEADING_CHARS_START = 0;
						$LEADING_CHARS_LEN   = $Pos;
					} else {
						print ".....";
					}   
				
					/* print substr($strFile, $LEADING_CHARS_START, $LEADING_CHARS_LEN) . "<font color=#800000><b>" . $TermArray[$j] . "</b></font>" . substr($strFile, $TRAILING_CHARS_START, $TRAILING_CHARS_LEN); */
				
					print substr($bakFile, $LEADING_CHARS_START, $LEADING_CHARS_LEN) . "<font color=#800000><b>" . substr($bakFile, $Pos, strlen($TermArray[$j])) . "</b></font>" . substr($bakFile, $TRAILING_CHARS_START, $TRAILING_CHARS_LEN); 

					if (!($Pos + strlen($TermArray[$j]) + $NoCharDisp > strlen($strFile))) print ".....";
								
					print "<br>";   
				
					$Prev = $i;
				
				}
				
			}   
			
		}
		  
		/* If A record was found previously then print the Line breaker. */
		 
		if ($Prev != -1) print "<br>";
		
	}       
	
	if (!($SearchMatch)) print "<font color=#008000><b>No Matches found.</b></font>"; 
	
	print "<hr color=000080><font color=000080><b>Return: $NumMatches Matches</b></font><hr color=000080>";
	
?>