Penguinsoft » PHP

MySQL Class for PHP

Tomi Lehto — Fri, 06 Aug 2010 01:57:50 +0000

This should get you started if you’re looking to connect to MySQL database.

Requires a simple configuration file where you keep all your variables (user/password/etc, like SITEDB_HOSTNAME).

To connect, just drop these lines in the code

require('mysqlClass.php');
$db = new mysqlClass();
$mystuff = $db->getStuff();

mysqlClass source:

class mysqlClass {
	public $_Link;
 
	// Construct: Open SQL
	public function __construct()
	{
		$this->_Link = mysql_connect(SITEDB_HOSTNAME, SITEDB_USERNAME, SITEDB_PASSWORD);
		mysql_query("SET NAMES 'utf8'");
		$db = mysql_select_db(SITEDB_DATABASE);
		if(!$this->_Link) $this->callError("Server connection error: " . SITEDB_HOSTNAME . ".");
		if(!$db) $this->callError("Database open error: " . SITEDB_DATABASE . ".");
	}
 
	// Destruct: Close SQL
	public function __destruct() {
		mysql_close($this->_Link);
	}
 
        // Update sample
	public function updateStuff($stuff, $id){
		$sql = sprintf("
			UPDATE 		stuff
			SET		stuff = '%s'
			WHERE		id = %d
		",
			mysql_real_escape_string($stuff), mysql_real_escape_string($id)
		);
		$result = mysql_query($sql, $this->_Link);
		if(!$result) $this->callError("Update Error: " . $sql);
	}
 
        //Insert Sample
	public function insertStuff($stuff){
		$sql = sprintf("
			INSERT INTO		stuff
						(stuff)
				VALUES		('%s');
		",
			mysql_real_escape_string($stuff)
		);
		mysql_query($sql) or $this->callError("Insert Error");
		return mysql_insert_id();
	}
 
	// Select Sample
	public function getStuff(){
		$sql = sprintf("
                    SELECT          *
                    FROM            stuff
		");
		$result = mysql_query($sql, $this->_Link);
		if(!$result) $this->callError("Result error: " . $sql);
		$queryresult = array();
		while ($row = mysql_fetch_object($result)) {
			$queryresult[] = $row;
		}
		mysql_free_result($result);
		return $queryresult;
	}
 
        // Show SQL errors
	function callError($details='') {
		echo 'Database Error: ' . $details . ' Error: ' . mysql_error();
	}
}

Show Errors in PHP

Tomi Lehto — Fri, 16 Jul 2010 03:39:57 +0000

In the good “old” days when 99% of all websites looked horrible, PHP would by default spit out all errors. If you made a mistake in your code, you’d get gracefully “notified”.

With PHP 5 we arrived to a new era of hidden rebukes – page just loads totally blank by default.

If you like games, you can just start searching the problem from your source code! If you have less than 100k lines you’ve got a good chance to find the issue before dawn.

If not, just drop these lines to the beginning of the script – should be fine…

ini_set('display_errors', '1');
error_reporting(E_ALL);

Bible Module

Tomi Lehto — Fri, 04 Jun 2010 13:44:00 +0000

Just finished a new module for TheD – Bible Module. This fancy feature allows visitors and users of TheDesperate.com to browse and search the King James Version (KJV) of the Bible. We’ve got some awesome added features planned, so this is just the beginning.

Leave comments and let us know what you think:

TheDesperate.com/bible

Updates and Joins in MySQL

Tomi Lehto — Fri, 19 Mar 2010 01:08:44 +0000

Now this is supremely hot. You can update a whole set of information from one table to another without passing any data from your PHP. Not sure if this works with MS SQL, I’ll check next time I’m around those machines.

Here is what I was after:

Users on a website need the ability to customize their personal pages
We want to make it easy for them by using themes (pre-selected styles, fonts, colors)
Users must have the ability to adjust their theme if they so desire

Here is what I did:

Created a theme table to MySQL that includes all the fancy style columns, like font styles, colors, etc
Added columns to users page table to match those theme styles
I created a PHP function to apply a theme based on theme selected, and user’s id

Awesomeness in this case comes to play when it’s time to change the theme. PHP is from a data object that has user id already set:

PHP Code:

public function setPageTheme($themeid){
    $sql = sprintf("
        UPDATE userpages U
        INNER JOIN themes T ON T.themeid = %d
        SET U.background=T.background, U.font=T.font, U.textcolor=T.textcolor
        WHERE U.userid = %d
    ",
        $this->esc($themeid), $this->userid
    );
    $result = mysql_query($sql, $this->_Link);
    if(!$result) $this->callError("Error: " . $sql);
}

So now you’ve got the theme transferred to users page, and then you just build a page where user can customize the theme further if they so desire. How cool is that? Hopefully this saves you some time.