Clearing cache for druplal node

cache_get('content:12345:23456', 'cache_content'); # get the data cache_clear_all('content:nid:vid', 'cache_content') # clear that specific nid/vid combination cache_clear_all('content:nid', 'cache_content', TRUE) # clear all cached revisions of that nid

PDO (PHP Data Objects) && Prepared Statements

A prepared statement s, essentially, the template of an SQl statement that has been pre-parsed and compiled and is ready to be executed by passing it the appropriate date.
Steps:
1. Create Prepared Statement (replacing your data with a set of markers uch as question marks, or named entities.
2. Load Data in the statement
3. Execute


// Example
$clean = array();

if (ctype_al[ha($_POST['username']))
{
        $clean['username'] = $_POST['username'];
}

// Set a named placeholder in the SQL statement for username
$sql = 'SELECT * FROM users WHERE username = :username';

// Assume the database handler exists; prepare the statement
$stmt = $dbh->prepare($sql);

// Bind a value for the parameter
$stmt->bindParam(':username', $clean['username']);

// Execute and fetch results
$stmt->execute;
$results = $stmt->fetchAll();

PHP Defined vars, functions, contstants

When debugging PHP application - it's convinient to print defined values on the
screen. PHP has build in functions:
- get_defined_vars();
- get_defined_functions();
- get_defined_constants();

PHP objects, Patterns, and Practice

The book is about OOP and design patterns specifically for PHP5. It also includes chapters for CVS, PHPUnit, Phing, Pear and phpDocumentor. I pleased with reading and information in the book. The book is a good programmer reference.

PHP Logic & Bit Operations

Here is good example of bit operations in PHP:
Bit Operations in PHP