Podgląd pliku: / db / db2_100RC.phps

<?php
/***************************************************** 
 *         Prosty interfejs do bazy danych           * 
 ***************************************************** 
 * Wersja: 2.0 RC                                    * 
 * Autor: Jacek Kowalski (http://jacekk.info)        * 
 *                                                   * 
 * Utwor rozprowadzany na licencji                   * 
 * http://creativecommons.org/licenses/by-nc-sa/2.5/ * 
 *****************************************************/

// Kodowanie znakow: UTF-8

class error {
    static function add($message) {
        // Funkcja przechwytujaca bledy
    }
}

class sql {
    static $db;
    static $queries = 0;
    
    static function connect() {
        self::$db = @mysql_connect('', '', '');
        if(!self::$db) {
            error::add(mysql_error());
        }
        
        self::query('SET CHARACTER SET \'UTF8\'');
        self::query('SET NAMES \'UTF8\'');
        
        self::$queries = 0;
        
        if(!@mysql_select_db('biblioteka')) {
            error::add(mysql_error());
        }
    }
    
    static function query($q) {
        if(!self::$db) {
            self::connect();
        }
        
        if(!@mysql_ping(self::$db)) {
            self::connect();
        }
        
        $r = @mysql_query($q, self::$db);
        
        self::$queries++;
        
        if($r===FALSE) {
            error::add(mysql_error().' '.$q);
        }
        
        return $r;
    }
    
    static function fetchone($q) {
        return mysql_fetch_array($q);
    }
    
    static function fetch($q) {
        while ($entry = mysql_fetch_array($q)) {
            $r[] = $entry;
        }
        
        if(!$r) {
            $r = array();
        }
        
        return $r;
    }
    
    static function affected() {
        return mysql_affected_rows(self::$db);
    }
    
    static function escape($q) {
        if(!self::$db) {
            self::connect();
        }
        
        if(!@mysql_ping(self::$db)) {
            self::connect();
        }
        
        return mysql_real_escape_string($q, self::$db);
    }
    
    static function close() {
        mysql_close(self::$db);
    }
}

class db2 {
    // Allows extended WHERE queries
    // LIKE, MATCH ... AGAINST, !=, >, <, IS NULL ...
    static $SAFE_MODE_WHERE = FALSE;
    
    // SELECT *
    static $SAFE_MODE_SELECT = FALSE;
    
    // Skipping empty fields in INSERTs
    static $SAFE_MODE_INSERT = FALSE;
    
    // Empty field is stated as NULL
    static $SAFE_MODE_UPDATE = FALSE;
    
    // Allows JOINs
    static $SAFE_MODE_TABLE = FALSE;
    
    // Allow `table`.`key` using table.key
    static $SAFE_MODE_KEY = FALSE;
    
    // Do htmlspecialchars() on db2::get results?
    static $ESCAPE_DATA = TRUE;
    
    private static $revelance = FALSE;
    
    static function revelance() {
        return (bool)self::$revelance;
    }
    
    static function __combine_insert($keys) {
        foreach($keys as $key => $value) {
            if(empty($key)) {
                continue;
            }
            
            if(!self::$SAFE_MODE_INSERT AND $value==='') {
                continue;
            }
            
            $a[] = '`'.sql::escape($key).'`';
            $b[] = '\''.sql::escape($value).'\'';
        }
        
        return '('.implode(', ', $a).') VALUES ('.implode(', ', $b).')';
    }
    
    static function __combine_update($keys) {
        foreach($keys as $key => $value) {
            if(empty($key)) {
                continue;
            }
            
            if(!self::$SAFE_MODE_UPDATE AND $value==='') {
                $value = NULL;
            }
            if(is_null($value)) {
                $a[] = '`'.sql::escape($key).'`=NULL';
            }
            else
            {
                $a[] = '`'.sql::escape($key).'`=\''.sql::escape($value).'\'';
            }
        }
        
        return implode(', ', $a);
    }
    
    static function __combine_select($keys, $revelance=FALSE) {
        if(!self::$SAFE_MODE_SELECT && $keys=='*') {
            $a[] =  '*';
        }
        else
        {
            if(!is_array($keys)) {
                $keys = array($keys);
            }
            
            foreach($keys as $v) {
                $a[] = self::__combine_keyn($v);
                if($one) break;
            }
            
        }
        
        if($revelance && self::$revelance) {
            $a[] = self::$revelance;
        }
        
        return implode(', ', $a);
    }
    
    static function __combine_where($keys, $revelance=FALSE) {
        self::$revelance = FALSE;
        
        $implode = ' AND ';
        
        if(!is_array($keys) OR empty($keys)) {
            return '';
        }
        
        if(self::$SAFE_MODE_WHERE) {
            foreach($keys as $key => $value) {
                if(is_null($value)) {
                    $a[] = self::__combine_keyn($key).' IS NULL';
                }
                else
                {
                    $a[] = self::__combine_keyn($key).'=\''.sql::escape($value).'\'';
                }
            }
        }
        else
        {
            $a = array();
            foreach($keys as $key => $v) {
                if(!is_array($v)) {
                    $v = array($v);
                }
                
                foreach($v as $value) {
                    if($key === 'OR') {
                        $implode = ' OR ';
                    }
                    elseif(is_null($value) OR $value==='') {
                        $a[] = self::__combine_keyn($key).' IS NULL';
                    }
                    elseif(substr($key, -1)=='!') {
                        $a[] = self::__combine_keyn(substr($key, 0, -1)).'!=\''.sql::escape($value).'\'';
                    }
                    elseif(substr($key, -2)=='~~') {
                        $temp = 'MATCH ('.self::__combine_keyn(substr($key, 0, -2)).') AGAINST (\''.sql::escape($value).'\')';
                        if($revelance) {
                            self::$revelance = $temp.' AS `revelance`';
                        }
                        
                        $a[] = $temp;
                    }
                    elseif(substr($key, -1)=='~') {
                        $a[] = self::__combine_keyn(substr($key, 0, -1)).' LIKE \''.sql::escape($value).'\'';
                    }
                    elseif(substr($key, -1)=='>') {
                        $a[] = self::__combine_keyn(substr($key, 0, -1)).'>\''.sql::escape($value).'\'';
                    }
                    elseif(substr($key, -1)=='<') {
                        $a[] = self::__combine_keyn(substr($key, 0, -1)).'<\''.sql::escape($value).'\'';
                    }
                    else
                    {
                        $a[] = self::__combine_keyn($key).'=\''.sql::escape($value).'\'';
                    }
                }
            }
        }
        
        return ' WHERE '.implode($implode, $a).$addon;
    }
    
    static function __combine_limit($limit, $stop) {
        if(!ctype_digit($limit) AND !is_int($limit)) {
            return '';
        }
        elseif(!ctype_digit($stop) AND !is_int($stop)) {
            return ' LIMIT '.$limit;
        }
        else
        {
            return ' LIMIT '.$limit.', '.$stop;
        }
    }
    
    static function __combine_order($keys, $revelance=FALSE) {
        if(empty($keys)) {
            return '';
        }
        
        if(!is_array($keys)) {
            $keys = array($keys => 'ASC');
        }
        
        foreach($keys as $key => $value) {
            $bvalue = strtoupper($value);
            if($bvalue != 'ASC' AND $bvalue != 'DESC') {
                $key = $value;
                $value = 'ASC';
            }
            else
            {
                $value = $bvalue;
            }
            
            if((!$revelance OR !self::$revelance) AND $key=='revelance') {
                continue;
            }
            
            $a[] = self::__combine_keyn($key).' '.$value;
        }
        
        return ' ORDER BY '.implode(', ', $a);
    }
    
    private static function __combine_tablelist($key, $value) {
        $as = FALSE;
        if(!is_int($key)) {
            $as = $value;
            $value = $key;
        }
        return '`'.sql::escape($value).'`'.($as ? ' AS `'.sql::escape($as).'`' : '');
    }
    
    static function __combine_keyn($key) {
        if(!self::$SAFE_MODE_KEY AND strpos($key, '.')!==FALSE) {
            $key = explode('.', $key, 2);
            return '`'.sql::escape($key[0]).'`.`'.sql::escape($key[1]).'`';
        }
        
        return '`'.sql::escape($key).'`';
    }
    
    static function __combine_table($table) {
        if(!is_array($table) OR self::$SAFE_MODE_TABLE) {
            return '`'.sql::escape($table).'` ';
        }
        else
        {
            $ret = array();
            foreach($table as $key => $value) {
                if(empty($value)) {
                    continue;
                }
                
                if(!is_array($value)) {
                    $ret[] = self::__combine_tablelist($key, $value);
                }
                else
                {
                    switch(strtoupper($value[0])) {
                        case 'L':
                            $sub = 'LEFT JOIN ';
                        break;
                        case 'R':
                            $sub = 'RIGHT JOIN ';
                        break;
                        case 'J':
                            $sub = 'JOIN ';
                        break;
                        case 'S':
                            $sub = 'STRAIGHT_JOIN ';
                        break;
                        default:
                            continue 2;
                        break;
                    }
                    
                    if(!is_array($value[1])) {
                        $value[1] = array($value[1]);
                    }
                    foreach($value[1] as $k => $v) {
                        $sub1[] = self::__combine_tablelist($k, $v);
                    }
                    $sub .= implode(', ', $sub1).' ';
                    
                    if(strtoupper($value[2])=='USING') {
                        $sub .= 'USING ('.self::__combine_select($value[3]).')';
                    }
                    elseif(strtoupper($value[2])=='ON') {
                        $sub .= 'ON '.substr(self::__combine_where($value[3]), 7);
                    }
                    
                    $ret[] = $sub;
                }
            }
            
            return implode(' ', $ret).' ';
        }
    }
    
    static function escape_data($data) {
        if(self::$ESCAPE_DATA) {
            if(is_array($data)) {
                foreach($data as &$value) {
                    $value = self::escape_data($value);
                }
            }
            elseif(is_string($data)) {
                $data = htmlspecialchars($data);
            }
        }
        
        return $data;
    }
    
    static function get($table, $keys, $where=NULL, $order=NULL, $limit=NULL, $stop=NULL, $revelance=FALSE) {
        $where = self::__combine_where($where, $revelance);
        $keys = self::__combine_select($keys, $revelance);
        
        $q = sql::query('SELECT '.$keys.' FROM '.self::__combine_table($table).$where.self::__combine_order($order, $revelance).self::__combine_limit($limit, $stop));
        return self::escape_data(sql::fetch($q));
    }
    
    static function getone($table, $keys, $where=NULL, $order=NULL, $limit=NULL, $stop=NULL, $revelance=FALSE) {
        $where = self::__combine_where($where, $revelance);
        $keys = self::__combine_select($keys, $revelance);
        
        $q = sql::query('SELECT '.$keys.' FROM '.self::__combine_table($table).$where.self::__combine_order($order, $revelance).self::__combine_limit($limit, $stop));
        return self::escape_data(sql::fetchone($q));
    }
    
    static function num($table, $key, $where) {
        $q = sql::query('SELECT COUNT('.self::__combine_select($key, $one).') AS `num` FROM '.self::__combine_table($table).self::__combine_where($where));
        $r = sql::fetchone($q);
        return $r['num'];
    }
    
    static function add($table, $keys) {
        sql::query('INSERT INTO `'.sql::escape($table).'` '.self::__combine_insert($keys));
        return sql::affected();
    }
    
    static function edit($table, $keys, $where=NULL, $order=NULL, $limit=NULL, $stop=NULL) {
        sql::query('UPDATE `'.sql::escape($table).'` SET '.self::__combine_update($keys).self::__combine_where($where).self::__combine_order($order).self::__combine_limit($limit, $stop));
        return sql::affected();
    }
    
    static function del($table, $where=NULL, $order=NULL, $limit=NULL, $stop=NULL) {
        sql::query('DELETE FROM `'.sql::escape($table).'`'.self::__combine_where($where).self::__combine_order($order).self::__combine_limit($limit, $stop));
        return sql::affected();
    }
}
?>

Browse Code © 2010 by Jacek Kowalski