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The new OO features are too numerous to give a detailed description in this  section. Chapter 3, “PHP 5 OO Language,” details each feature. The following list provides the main new features: public / private / protected access modifiers for methods and properties. Allows the use of common OO access modifiers to control access to methods and properties: class MyClass { private $id = 18; public function getId() { return $this->id; } } Unified constructor name __construct() . Instead of the constructor being the name of the class, it is now declared  as  __construct() , which makes it easier to shift classes inside class hierarchies: class MyClass { function __construct() { print "Inside constructor"; } } Object destructor support by defining a  __destructor()  method. Allows defining a destructor function that runs when an object  is destroyed: class MyClass { function __destruct() { print ”Destroying object”; } } Interfaces. Gives the abi

arsort — Sort an array in reverse order and maintain index association asort — Sort an array and maintain index association compact — Create array containing variables and their values count — Count all elements in an array, or something in an object current — Return the current element in an array each — Return the current key and value pair from an array and advance the array cursor end — Set the internal pointer of an array to its last element extract — Import variables into the current symbol table from an array in_array — Checks if a value exists in an array key — Fetch a key from an array krsort — Sort an array by key in reverse order ksort — Sort an array by key list — Assign variables as if they were an array natcasesort — Sort an array using a case insensitive "natural order" algorithm natsort — Sort an array using a "natural order" algorithm next — Advance the internal array pointer of an array pos — Alias of current prev — Rewind the in

mysql_affected_rows — Get number of affected rows in previous MySQL operation mysql_client_encoding — Returns the name of the character set mysql_close — Close MySQL connection mysql_connect — Open a connection to a MySQL Server mysql_create_db — Create a MySQL database mysql_data_seek — Move internal result pointer mysql_db_name — Retrieves database name from the call to mysql_list_dbs mysql_db_query — Selects a database and executes a query on it mysql_drop_db — Drop (delete) a MySQL database mysql_errno — Returns the numerical value of the error message from previous MySQL operation mysql_error — Returns the text of the error message from previous MySQL operation mysql_escape_string — Escapes a string for use in a mysql_query mysql_fetch_array — Fetch a result row as an associative array, a numeric array, or both mysql_fetch_assoc — Fetch a result row as an associative array mysql_fetch_field — Get column information from a result and return as an obje