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Adrian Schneider · #16 12-06-2005, 08:03 PM

Here is my DB class for one of my sites.

PHP Code:


			
<?php



class Database

{

    var $host;

    var $username;

    var $password;

    var $databasename;

    var $connection;

    

    /**

     * Constructor Method

     * Initializes connection and selects database.

    **/

    function Database($host, $username, $password, $databasename)

    {

        $this->host = $host;

        $this->username = $username;

        $this->password = $password;

        $this->databasename = $databasename;



        $this->connect($this->host, $this->username, $this->password);

    }

    

    /**

     * Establishes MySQL connection.

    **/

    function connect()

    {

        $this->connection = @mysql_connect($this->host, $this->username, $this->password);

        if (!$this->connection)

        {

            $error = new Page;

            $error->error('Could not establish database connection.</p><p>' . mysql_error());

        }

        return $this->select_db($this->databasename);

    }

    

    /**

     * Selects MySQL database.

    **/

    function select_db()

    {

        $resource = @mysql_select_db($this->databasename, $this->connection);

        if (!$resource)

        {

            $error = new Page;

            $error->error('Could not select database "' . $this->databasename . '".');

        }

        return $resource;

    }

    

    /**

     * Executes a MySQL query.

    **/

    function query($querystring)

    {

        if (strpos($querystring, "\t\t\t\t") !== false)

        {

            $querystring = str_replace("\t\t\t\t", "\t\t", $querystring);

            $querystring = str_replace("\t\t\t", "\t", $querystring);

        }

        $resource = mysql_query($querystring, $this->connection);

        if (!$resource)

        {

            $this->debug_query($querystring);

        }

        return $resource;

    }

    

    /**

     * Fetches rows from the database.

    **/

    function fetch($result)

    {

        if (mysql_num_rows($result))

        {

            $resource = mysql_fetch_assoc($result);

            return $resource;

        }

        return false;

    }

    

    /**

     * Halts execution of the script and displays the problem.

    **/

    function debug_query($query)

    {

        $error = new Page;

        $errormessage = '<h2 class="queryfail">Failed Query:</h2><div style="background-color: #EEEEEE; width:640px; padding:5px; margin: 0 auto;">';

        $errormessage .= '<pre class="query">' . $this->highlight_sql($query) . '</pre></div>';

        if (mysql_error())

        {

            $errormessage .= '<h2 class="queryfailHeader">Reason:</h2>';

            $errormessage .= '<p class="queryfailReason">' . mysql_error() . '</p>';

        }



        $error->error($errormessage, 'Database Error');

    }



    /**

     * Highlights MySQL Code

    **/

    function highlight_sql($query)

    {

        $query = preg_replace("/['\"]([^'\"]*)['\"]/i", "'<span style='color: #FF6600'>$1</span>'", $query, -1);



        $find = array(

            '*',

            'SELECT ',

            'UPDATE ',

            'DELETE ',

            'INSERT ',

            'CREATE ',

            'TABLE ',

            'INTO',

            'VALUES',

            'FROM',

            'LEFT',

            'JOIN',

            'WHERE',

            'LIMIT',

            'ORDER BY',

            'AND',

            'OR ',

            'DESC',

            'ASC',

            'ON ',

            "\t\t\t",

            'INT ',

            'varchar ',

            'VARCHAR ',

            'NOT NULL',

            'AUTO_INCREMENT',

            'UNSIGNED',

            'PRIMARY KEY '

        );

        

        $replace = array(

            '<span style="#FF6600; font-weight: bold;">*</span>',

            '<span style="color: #00AA00; font-weight: bold;">SELECT </span>',

            '<span style="color: #00AA00; font-weight: bold;">UPDATE </span>',

            '<span style="color: #00AA00; font-weight: bold;">DELETE </span>',

            '<span style="color: #00AA00; font-weight: bold;">INSERT </span>',

            '<span style="color: #00AA00; font-weight: bold;">CREATE </span>',

            '<span style="color: #00AA00; font-weight: bold;">TABLE </span>',

            '<span style="color: #00AA00; font-weight: bold;">INTO</span>',

            '<span style="color: #00AA00; font-weight: bold;">VALUES</span>',

            '<span style="color: #00AA00; font-weight: bold;">FROM</span>',

            '<span style="color: #00CC00; font-weight: bold;">LEFT</span>',

            '<span style="color: #00CC00; font-weight: bold;">JOIN</span>',

            '<span style="color: #00AA00; font-weight: bold;">WHERE</span>',

            '<span style="color: #AA0000; font-weight: bold;">LIMIT</span>',

            '<span style="color: #00AA00; font-weight: bold;">ORDER BY</span>',

            '<span style="color: #0000AA; font-weight: bold;">AND</span>',

            '<span style="color: #0000AA; font-weight: bold;">OR </span>',

            '<span style="color: #0000AA; font-weight: bold;">DESC</span>',

            '<span style="color: #0000AA; font-weight: bold;">ASC</span>',

            '<span style="color: #00DD00; font-weight: bold;">ON </span>',

            "\t",

            '<span style="color: #0000AA; font-weight: bold;">INT </span>',

            '<span style="color: #0000AA; font-weight: bold;">varchar </span>',

            '<span style="color: #0000AA; font-weight: bold;">VARCHAR </span>',

            '<span style="color: #0000AA; font-weight: bold;">NOT NULL</span>',

            '<span style="color: #0000AA; font-weight: bold;">AUTO_INCREMENT</span>',

            '<span style="color: #0000AA; font-weight: bold;">UNSIGNED</span>',

            '<span style="color: #0000AA; font-weight: bold;">PRIMARY KEY </span>',

        );

        return str_replace($find, $replace, $query);

    }

    

    /**

     * Escapes data when going into the database.

     * This is not for SQL Injections.

    **/

    function escape($value)

    {

        if (!is_int($value))

        {

            if (is_numeric($value))

            {

                $value = floatval($value);

            }

            else

            {

                $value = (get_magic_quotes_gpc()) ? $value  : addslashes($value);

            }

            $value = "'" . $value . "'";

        }

        return $value; 

    }

    

    /**

     * Checks how many rows were found from a query.

    **/

    function num_rows($resource)

    {

        return mysql_num_rows($resource);

    }

    

    /**

     * Insert data into the database.

     * Generates query based on $data array (field => val)

    **/

    function insert($table, $data)

    {

        // Field Names

        $columnbit = '';

        $columns = array_keys($data);

        for ($i=0; $i<count($columns); $i++)

        {

            $columnbit .= (($i) ? ', ' : '') . '`' . $columns[$i] . '`';

        }



        // Values

        $valuebit = '';

        $values = array_values($data);

        for ($i=0; $i<count($values); $i++)

        {

            $value = $this->escape($values[$i]);

        

            $valuebit .= "\t\t\t\t" . $value . (($i != count($values)-1) ? ', ' . "\n" : '');

        }

        

        // Run Query

        $this->query('

            INSERT INTO ' . $table.  '

                (' . $columnbit . ')

            VALUES (' . "\n" .  

                $valuebit . '

            )'

        );

            

    }

    

    /**

     * Update data in the database.

     * Generates query based on $data array (field => val)

    **/

    function update($table, $data, $whereclause)

    {

        $valuestofields = '';

        $i = 0;

        foreach ($data as $field => $value)

        {

            $i++;

            $valuestofields .= $field . ' = ' . $this->escape($value) . (($i != count($data)) ? ', ' : '') . "\n\t\t\t\t";

        }

        // Run Query

        $this->query('

            UPDATE ' . $table.  '

            SET' . "\n\t\t\t\t" . 

                $valuestofields . 

            $whereclause

        );

            

    }

    



}





?>

Does anyone know of a good SQL syntax highlighter (that doesn't require installing additional libraries)?

[edit]Usage being:

PHP Code:


			
$db = new Database('server', 'user', 'pass', 'db');

just replace the error handling method ... mine uses another class for displaying things.

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Template Usage: (1)SHOWTHREAD (1)ad_footer_end (1)ad_footer_start (1)ad_header_end (1)ad_header_logo (1)ad_navbar_below (1)ad_showthread_beforeqr (13)bbcode_php (6)bbcode_quote (1)footer (1)forumjump (1)forumrules (1)gobutton (1)header (1)headinclude (1)navbar (3)navbar_link (120)option (17)post_thanks_box (17)post_thanks_button (1)post_thanks_javascript (1)post_thanks_navbar_search (17)post_thanks_postbit_info (17)postbit (13)postbit_onlinestatus (17)postbit_wrapper (1)showthread_list (1)spacer_close (1)spacer_open (1)tagbit_wrapper Phrase Groups Available: global inlinemod postbit posting reputationlevel showthread	Included Files: ./showthread.php ./global.php ./includes/init.php ./includes/class_core.php ./includes/config.php ./includes/functions.php ./includes/class_hook.php ./includes/modsystem_functions.php ./includes/functions_bigthree.php ./includes/class_postbit.php ./includes/class_bbcode.php ./includes/functions_reputation.php ./includes/functions_threadedmode.php ./includes/functions_post_thanks.php Hooks Called: init_startup init_startup_session_setup_start init_startup_session_setup_complete cache_permissions fetch_postinfo_query fetch_postinfo fetch_threadinfo_query fetch_threadinfo fetch_foruminfo style_fetch cache_templates global_start parse_templates global_setup_complete showthread_start showthread_getinfo forumjump showthread_post_start showthread_query_postids_threaded showthread_threaded_construct_link showthread_query bbcode_fetch_tags bbcode_create showthread_postbit_create postbit_factory postbit_display_start post_thanks_function_post_thanks_off_start post_thanks_function_post_thanks_off_end post_thanks_function_fetch_thanks_start post_thanks_function_fetch_thanks_end post_thanks_function_thanked_already_start post_thanks_function_thanked_already_end fetch_musername postbit_imicons bbcode_parse_start bbcode_parse_complete_precache bbcode_parse_complete postbit_display_complete post_thanks_function_can_thank_this_post_start tag_fetchbit_complete forumrules navbits navbits_complete showthread_complete
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