db_search class can be scaled for any database system you might have.

By : smckone

//============================================
// NEWS
**future updates**
1) porting to other databases like postgreSQL and MSSQL
2) function to tie searches together (may be a diffrent script)

//============================================
// Function List
void = load_properties((string user_name,string password,string host_add,string database_ name);

void = connect(void);

// note the column can be an array when the table is a string
// this allows for searchs of more than one column in a table
// seting the column name to ALL_COLUMNS will make the script
// search all the columns of that table (if sensitive information
// is in that table do not do this).
void = load_tables(string table_name,string column_name||array);
void = load_tables(array table_names,array column_names||array);

void = add_table(string table_name,string column_name||array);
void = add_table(array table_names,array column_names||array);

void = all_columns(int table_num);
void = all_columns(string table_name);

void = exec(string search_text);

void = free_results(void);
void = close(void);

array = get_row(void);

array = get_exact_row(int row_number);

int = num_rows(void);

void = delete_row(int row_number);

//============================================
// sample of use

$search = new db_search("user name","password","sql.php.net","this site");

$tables = array("name","forum","text");
$columns = array("column","column","body");

$search->load_tables($tables,$columns);
$search->add_table("another","column");

$search->exec("search for");
$i = 0;
while($i < $search->num_rows()){
$row = $search->get_row();
for($n = 0;$n < count($row);$n++){
echo "$row[$n] ";
}
$i++;
echo "<br>";
}

// complex use of db_search
$search = new db_search("dev","not gonna tell you","","devsite");

$tables = array("users","articles");
$s = array("body","subject");
$columns = array("body","body",);

$search->load_tables($tables,$columns);
$search->add_table("forum_topic",$s);

$search->exec("php");

echo $search->num_rows();

<?php
//=======================================================
// db_search class can be scaled for any database system
// you might have.
// (Please send any updates to sam@evilwalrus.com)
//
// Sam McKone
// Oct. 2001
//========================================================

class db_search{
//=======================================================
// data members
//=======================================================
var $tables = "";
var $field = "";
var $results = "";
var $result_loc = 0;

var $host = "";
var $user_name = "";
var $pass_word = "";
var $data_base = "";

var $connection = "";
//=======================================================
// constructors
//=======================================================
function db_search($set_user,$set_pass,$set_host,$set_db_name){
$this->load_properties($set_user,$set_pass,$set_host,$set_db_name);
$this->connect(); // start the mySQL connection
}
//=======================================================
// Connection and initialization functions
//=======================================================
function load_properties($set_user,$set_pass,$set_host,$set_db_name){
$this->user_name = $set_user;
$this->pass_word = $set_pass;
$this->data_base = $set_db_name;
$this->host = $set_host;
}
function connect(){
if(!$this->host){
$this->error("Host was not set");
}elseif(!$this->user_name){
$this->error("User was not set");
}elseif(!$this->pass_word){
$this->error("Password was not set");
}

$this->connection = mysql_connect($this->host,
$this->user_name,$this->pass_word);
if(!$this->connection){
$this->error("Connection could not be established");
}
}
//=========================================================
// Table functions
//=========================================================
// warning running load_tables function more than once
// will overwrite prevously entered tables, to add another
// table use the add_table function

function load_tables($set_tables,$set_field){
$this->tables = $set_tables;
$this->field = $set_field;
$this->scan_tables();
}
function add_table($new_table,$set_field){
if(is_array($new_table) AND is_array($set_field)){
$i = count($this->tables);
for($j = 0;$j < count($new_table);$j++,$i++){
$this->tables[$i] = $new_table[$j];
$this->field[$i] = $set_field[$j];
}
}elseif(is_string($new_table)){
$i = count($this->tables);
$this->tables[$i] = $new_table;
$this->field[$i] = $set_field;
}else{
$this->error("Pass a string or an array of strings");
}
$this->scan_tables();
}
function all_columns($table){
if(is_string($table)){
$temp = $table;
$table = 0;
while($this->tables[$table] != $temp && $table < count($this->tables)){
$table++;
}
}
if($table >= count($this->tables)){
// if table was not yet entered
$this->error("table <b>".$temp."</b> is not in the records.");
return false;
}
if($this->connection){
$i = 0;
$query = "SHOW FIELDS FROM ".$this->tables[$table].";";
$tempory = mysql_db_query($this->data_base,$query,$this->connection);
$this->field[$table] = array();
while($row = mysql_fetch_assoc($tempory)){
$this->field[$table][$i] = $row[Field];
$i++;
}
}else{
$this->error("function <b>all_columns()</b> can only be run after "
."a connection is made.");
}
}
function scan_tables(){
for($i = 0;$i < count($this->tables);$i++){
if($this->field[$i] == "ALL_COLUMNS"){
$this->all_columns($i);
}


}
}
//=========================================================
// exacution functions
//=========================================================
function exec($search_string){
if($this->connection){
if($this->results){
$loc = count($this->results);
}else{
$loc = 0;
}
for($i = 0; $i < count($this->tables);$i++){
if(is_array($this->field[$i])){
$query = "SELECT * FROM ".$this->tables[$i]." WHERE ";
$query .= $this->field[$i][0];
$query .= " LIKE '%$search_string%'";
for($n = 1;$n < count($this->field[$i]);$n++){
$query .= " OR ".$this->field[$i][$n];
$query .= " LIKE '%$search_string%'";
}
}else{
$query = "SELECT * FROM ".$this->tables[$i]." WHERE ";
$query .= $this->field[$i]." ";
$query .= "LIKE '%$search_string%';";
}
$tempory = mysql_db_query($this->data_base,$query,$this->connection);

while($row = mysql_fetch_array($tempory)){
$this->results[$loc] = $row;
$loc++;
}
}
}else{
$this->error("function <b>exec()</b> can only be run after "
."a connection is made.");
}
}
//=========================================================
// memory release functions
//=========================================================
function close(){
$this->tables = "";
$this->field = "";
$this->host ="";
$this->user_name = "";
$this->pass_word = "";
$this->free_results();
$this->data_base = "";
$this->connection = "";
}
function free_results(){
$this->results = "";
$this->result_loc = 0;
}
//=======================================================
// Result functions
//=======================================================
function set_row_pos($pos){
if($pos <= count($this->results)){
$this->result_loc = $pos;
}
}
function get_row(){
return $this->results[$this->result_loc++];
}
function get_exact_row($row_num){
return $this->results[$row_num];
}
function num_rows(){
$count = 0;
while($this->results[$count])$count++;
return $count;
}
// Warning deleting rows will change the row order.
function delete_row($row_num){
for(;$row_num < count($this->results);$row_num++){
$this->results[$row_num] = $this->results[$row_num + 1];
}
$this->results[$row_num] = 0;
}
//=======================================================
// Internal functions
//=======================================================
function error($error_text){
echo $error_text . "<br>";
}
}

?>

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