Make a search engine for your website with PHP
This hands on PHP Programming article provides the knowledge
necessary to design and develop a search engine for your website
using PHP version 4.0 and above. Making a search engine for your
website with PHP is really easy and provides substantial
functionality required by most of the small to medium websites.
This article introduces every steps of the development,
including both design and PHP programming. Basic computer skills
and knowledge of HTML fundamentals are required. Ok, let's begin
now.
Step 1: Design Search Box Under your website root, make a file
called search.htm or anything you like and type in the following
code:
Web Search
Step 2: Write search.php file. It is the core of your website
search engine.
Under your website root, create a file called search.php or
anything you like.
With above, you can give hints to your users when they forget to
enter a keyword. Now let's go through all the files or articles
in your website.
The following scripts read, process files and check whether the
files contain $keyword. If $keyword is found in the file, the
file address will be saved in an array-type variable.
Now, combine the programs listed above, you will find all the
related results in your websites will be found and listed. A
further optimization of the search engine can be taken by adding
the following,
1,list the title of all searching results
REPLACE THE FOLLOWING
if(eregi("$keyword",$data)){
$array[]="$dir/$file";
}
WITH
if(eregi("$keyword",$data)){
if(eregi("(.+)
",$data,$m)){
$title=$m["1"];
}
else{
$title="no title";
}
$array[]="$dir/$file $title";
}
2,Add links to searching results
CHANGE THE FOLLOWING
foreach($array as $value){
echo "$value"." \n";
}
TO
foreach($array as $value){
list($filedir,$title)=split("[ ]",$value,"2");
echo "$value"." \n";
}
3 Set time limit for PHP execution
ADD THE FOLLOWING AT THE BEGINNING OF PHP FILES
set_time_limit("600");
The above unit is second，so ten minutes is the litmit.
Now, combine all the above programs and get the complete
search.php file as following,
]+)>(.+) ",$data,$b)){
$body=strip_tags($b["2"]);
}
else{
$body=strip_tags($data);
} if($file!="search.php"){
if(eregi("$keyword",$body)){
if(eregi("