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MISCELLANEOUS CODE

SPL and ITERATOR : examples
By: Codewalkers
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  • Rating: 5 stars5 stars5 stars5 stars5 stars / 1
    2006-11-27

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    This is a package showing some applications using the Iterators.
    I want to show them because I has some difficulties finding complexed pieces of code using the SPL on the net. Most of the tutorials are pretty basic.

    By : malalam

    <?php
    /**
    * oUser package
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    */
    if (!class_exists ('RecursiveArrayIterator')) { // PHP5 < 5.1
    /**
    * class RecursiveArrayIterator
    * @author php.net
    * implementation for PHP5 < 5.1
    */
    class RecursiveArrayIterator extends ArrayIterator implements RecursiveIterator {

    private $ref;

    function hasChildren () {
    return is_array ($this -> current ());
    }

    function getChildren () {
    if ($this -> current () instanceof self) {
    return $this -> current ();
    }
    if (empty ($this -> ref)) {
    $this -> ref = new ReflectionClass ($this);
    }
    return $this -> ref -> newInstance ($this -> current ());
    }
    }
    }

    /**
    * class oUserException extends Exception
    * personalized Exception class for this package
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    */
    class oUserException extends Exception {

    const ERROR_GEN_NOT_SETABLE = '{__PROP__} is not a setable property';
    const ERROR_GEN_NOT_GETABLE = '{__PROP__} is not a getable property';

    const ERROR_USER_PROP_NOT_EXISTS = '{__PROP__} property does not exist';
    const ERROR_USER_PROP_HAS_NO_VALUE = '{__PROP__} property has no value';
    const ERROR_USER_XML_KEY_NOT_COMPLETE = '{__KEY__} has no children';
    const ERROR_USER_XML_FILE_NOT_EXISTS = '{__FILE__} has not been found';
    const ERROR_USER_XML_LOADING_FAILED = 'Failed to load {__FILE__}';
    const ERROR_USER_CHECKIDENT_BAD_VALUES_COUNT = 'Values given in arguments and Authentication fields do not match';
    const ERROR_USER_MANDATORY_FIELD_MISSING = 'The mandatory field {__FIELD__} is missing';
    const ERROR_USER_ID_NOT_INTEGER = 'User ID must be an integer';

    public function __construct($sMsg, $iCode = 0) {
    parent::__construct($sMsg, $iCode);
    }
    }

    /**
    * class myFilter extends FilterIterator
    * filter Iterator class dedicated to oUser class
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    */
    class myFilter extends FilterIterator {

    /**
    * private oIt
    * Iterator object
    * @var Iterator
    */
    private $oIt = null;

    /**
    * private mFilter
    * main filter
    * @var string
    */
    private $mFilter = null;

    /**
    * public function __construct
    * constructor
    *
    * @param (RecursiveIteratorIterator) oIt
    * @param (string) mFilter
    */
    public function __construct (RecursiveIteratorIterator $oIt, $mFilter = null) {
    parent::__construct ($oIt);
    $this -> oIt = $oIt;
    $this -> mFilter = $mFilter;
    }

    /**
    * public function accept
    *
    * @return (boolean)
    */
    public function accept () {
    if (!is_null ($this -> mFilter)) {
    if ($this -> oIt -> key () === $this -> mFilter && $this -> oIt -> getDepth () === 0) {
    return true;
    }
    if ($this -> oIt -> key () === $this -> mFilter && $this -> oIt -> getDepth () === 1) {
    return true;
    }
    if ($this -> oIt -> getDepth () > 0 && $this -> oIt -> getSubIterator (0) -> key () === $this -> mFilter) {
    return true;
    }
    return false;
    }
    return true;
    }

    }

    /**
    * abstract class abstractUser
    * abstraction class defining oUser
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    */
    abstract class abstractUser {

    /**
    * protected aCanBeGet
    * array of properties that can be get
    * @var array
    */
    protected $aCanBeGet = array (
    'FILTER',
    'SUBFILTER',
    'ITMODE'
    );

    /**
    * protected aCanBeSet
    * array of properties that can be set
    * @var array
    */
    protected $aCanBeSet = array (
    'FILTER',
    'SUBFILTER',
    'ITMODE'
    );

    /**
    * protected cItMode
    * RecursiveIteratorIterator mode
    * @var RecursiveIteratorIterator constant
    */
    protected $cItMode = true;

    /**
    * protected mFilter
    * main filter
    * @var string
    */
    protected $mFilter = null;

    /**
    * protected aProps
    * array of properties
    * @var array
    */
    protected $aProps = array ();

    /**
    * public oSession
    * oSession object
    * @var oSession
    */
    public $oSession = null;

    /**
    * protected oXml
    * simpleXML object
    * @var simpleXML
    */
    protected $oXml = null;

    /**
    * public function __construct
    * constructor
    * @param (string) $fXml : xml config filename
    */
    public function __construct ($fXml) {
    if (!file_exists ($fXml)) {
    throw new oUserException (str_replace ('{__FILE__}', $fXml, oUserException::ERROR_USER_XML_FILE_NOT_EXISTS));
    }
    if (!($this -> oXml = @simplexml_load_file ($fXml)) instanceof SimpleXMLElement) {
    throw new oUserException (str_replace ('{__FILE__}', $fXml, oUserException::ERROR_USER_XML_LOADING_FAILED));
    }
    $this -> oSession = new oSession ($this -> oXml);
    $this -> aPropsFill ();
    }

    /**
    * private function aPropsFill
    * fills the array of properties aProps from oXml
    */
    private function aPropsFill () {
    foreach ($this -> oXml -> USER -> children () as $oNode) {
    $aTmp = array ();
    foreach ($oNode -> children() as $oChild) {
    $aTmp[(string)dom_import_simplexml($oChild) -> tagName] = (string)$oChild['value'];
    }
    if (empty ($aTmp)) {
    throw new oUserException (str_replace ('{__KEY__}', (string)dom_import_simplexml($oNode) -> tagName, self::ERROR_XML_KEY_NOT_COMPLETE));
    }
    $this -> aProps[(string)dom_import_simplexml($oNode) -> tagName] = $aTmp;
    }
    }

    /**
    * public function __get
    * getter
    * @param (string) sProp
    * @return sProp value
    */
    public function __get ($sProp) {
    if (!in_array ($sProp, $this -> aCanBeGet) && !array_key_exists ($sProp, $this -> aProps)) {
    throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_GEN_NOT_GETABLE));
    }
    switch ($sProp) {
    case 'FILTER' :
    return $this -> mFilter;
    break;
    case 'SUBFILTER' :
    return $this -> mSubFilter;
    break;
    case 'ITMODE' :
    return $this -> cItMode;
    break;
    default :
    if (!isset ($this -> aProps[$sProp])) {
    throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_USER_NOT_EXISTS));
    }
    if (!is_null ($this -> mFilter)) {
    if (isset ($this -> aProps[$sProp][$this -> mFilter])) {
    return $this -> aProps[$sProp][$this -> mFilter];
    }
    }
    if (!isset ($this -> aProps[$sProp]['VALUE'])) {
    //throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_USER_PROP_HAS_NO_VALUE));
    return null;
    }
    return $this -> aProps[$sProp]['VALUE'];
    break;
    }
    }

    /**
    * public function __set
    * setter
    * @param (string) sProp
    * @param (mixed) mVal
    * @return void
    */
    public function __set ($sProp, $mVal) {
    if (!array_key_exists ($sProp, $this -> aProps) && !in_array ($sProp, $this -> aCanBeSet)) {
    throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_GEN_NOT_SETABLE));
    }
    switch ($sProp) {
    case 'FILTER' :
    $this -> mFilter = $mVal;
    break;
    case 'ITMODE' :
    $this -> cItMode = $mVal;
    break;
    default :
    $this -> aProps[$sProp]['VALUE'] = $mVal;
    break;
    }
    }

    /**
    * public function getProps
    * get the aProps array of properties
    * @return RecursiveIteratorIterator or myFilter Iterator
    */
    public function getProps () {
    if (!is_null ($this -> mFilter)) {
    if (is_string ($this -> mFilter)) {
    return new myFilter (new RecursiveIteratorIterator (new RecursiveArrayIterator ($this -> aProps), $this -> cItMode), $this -> mFilter);
    }
    }
    return new RecursiveIteratorIterator (new RecursiveArrayIterator ($this -> aProps), $this -> cItMode);
    }

    /**
    * abstract public function checkIdent
    * check if a user exists in the database, given IDENT fields in the xml config file
    * @param (string) sTable : users DB table name
    * @param (array) aValues : array of fields to be checked, each key being the key of the config file, and the value being the input value
    */
    abstract public function checkIdent ($sTable, $aValues);

    /**
    * abstract public function createUser
    * create a user if values are correct
    * @param (string) sTable : users db table name
    * @param (array) aValues : array of fields to be created, each key being the key of the config file, and the value being the input value
    */
    abstract public function createUser ($sTable, $aValues);

    /**
    * abstract public function getUser
    * get a user from DB
    * @param (mixed) iUserId : existing user ID in the DB
    * @param (string) sTable : users db table name
    * @param (boolean) bSession : true if get values must fill the session (if config file defines these fields for the session), false if not
    */
    abstract public function getUser ($iUserId, $sTable, $bSession = true);

    /**
    * abstract public function modUser
    * modify a user in DB
    * @param (mixed) iUserId : existing user ID in the DB
    * @param (string) sTable : users db table name
    * @param (array) aValues : array of fields to be modified, each key being the key of the config file, and the value being the input value
    * @param (boolean) bSession : true if get values must fill the session (if config file defines these fields for the session), false if not
    */
    abstract public function modUser ($iUserId, $sTable, $aValues, $bSession = true);

    }

    /**
    * class oSession
    * session class
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    *
    * see abstractUser for info about the methods and properties of this class, same definitions apply here
    */
    class oSession {

    private $aProps = array ();
    private $oXml;

    public function __construct (simpleXMLElement $oXml) {
    $sSessionId = session_id ();
    if (empty ($sSessionId)) {
    session_start ();
    }
    $this -> oXml = $oXml;
    $this -> aPropsFill ();
    }

    private function aPropsFill () {
    foreach ($this -> oXml -> SESSION -> children () as $oNode) {
    $this -> aProps[(string)dom_import_simplexml($oNode) -> tagName] = null;
    }
    }

    public function __get ($sProp) {
    if (!array_key_exists ($sProp, $this -> aProps)) {
    throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_GEN_NOT_SETABLE));
    }
    return $this -> aProps[$sProp];
    }

    public function __set ($sProp, $mVal) {
    if (!array_key_exists ($sProp, $this -> aProps)) {
    throw new oUserException (str_replace ('{__PROP__}', $sProp, oUserException::ERROR_GEN_NOT_GETABLE));
    }
    $this -> aProps[$sProp] = $mVal;
    $_SESSION['USER'][$sProp] = $mVal;
    }

    public function __isset ($sProp) {
    if (!array_key_exists ($sProp, $this -> aProps)) {
    return false;
    }
    return true;
    }
    }

    /**
    * class oUser extends abstractUser
    * user class
    * @author Johan Barbier <johan.barbier@gmail.com>
    * @version 20061124
    *
    * see abstractUser for info about the methods and properties of this class, same definitions apply here
    */
    class oUser extends abstractUser {

    private $oDB;

    public function __construct ($sXml, $oDB) {
    parent::__construct ($sXml);
    $this -> oDB = $oDB;
    }

    public function checkIdent ($sTable, $aValues) {
    $sTmp = $this -> mFilter;
    $this -> mFilter = 'IDENT';
    $aProps = $this -> getProps ();
    foreach ($aProps as $sV) {
    $sKeyName = $aProps -> getInnerIterator () -> getSubIterator (0) -> key ();
    $sCurrentDbName = $this -> aProps [$sKeyName]['BDD_NAME'];
    if (empty ($aValues[$sKeyName])) {
    throw new oUserException (oUserException::ERROR_USER_CHECKIDENT_BAD_VALUES_COUNT);
    }
    if ($this -> aProps[$sKeyName]['TYPE'] === 'string') {
    if (isset ($this -> aProps[$sKeyName]['DEDOUBLE'])) {
    $aDedoub[] = $sCurrentDbName.' = \''.$aValues[$sKeyName].'\'';
    }
    $aIdent[] = $sCurrentDbName.' = \''.$aValues[$sKeyName].'\'';
    } else {
    if (isset ($this -> aProps[$sKeyName]['DEDOUBLE'])) {
    $aDedoub[] = $sCurrentDbName.' = '.$aValues[$sKeyName];
    }
    $aIdent[] = $sCurrentDbName.' = '.$aValues[$sKeyName];
    }
    }
    $this -> mFilter = $sTmp;
    if (count ($aValues) !== count ($aIdent)) {
    throw new oUserException (oUserException::ERROR_USER_CHECKIDENT_BAD_VALUES_COUNT);
    }
    $sWhereClause = implode (' AND ', $aIdent);
    $sQuery = 'SELECT '.$this -> aProps['ID']['BDD_NAME'].' FROM '.$sTable.' WHERE '.$sWhereClause;
    $this -> oDB -> query ($sQuery);
    $aRes = $this -> oDB -> fetch_assoc ();
    if (!empty ($aRes[$this -> aProps['ID']['BDD_NAME']])) {
    $this -> oSession -> ID = $aRes[$this -> aProps['ID']['BDD_NAME']];
    return true;
    } else {
    if (!empty ($aDedoub)) {
    $sWhereDedoubClause = implode (' AND ', $aDedoub);
    $sQuery = 'SELECT '.$this -> aProps['ID']['BDD_NAME'].' FROM '.$sTable.' WHERE '.$sWhereDedoubClause;
    $this -> oDB -> query ($sQuery);
    $aRes = $this -> oDB -> fetch_assoc ();
    if (!empty ($aRes[$this -> aProps['ID']['BDD_NAME']])) {
    return -1;
    }
    }
    return false;
    }
    }

    public function createUser ($sTable, $aValues) {
    $sTmp = $this -> mFilter;
    $this -> mFilter = 'MANDATORY';
    $aProps = $this -> getProps ();
    foreach ($aProps as $sK => $sV) {
    $sMandatory = $aProps -> getInnerIterator () -> getSubIterator (0) -> key ();
    if (empty ($aValues[$sMandatory])) {
    throw new oUserException (str_replace ('{__FIELD__}', $sMandatory, oUserException::ERROR_USER_MANDATORY_FIELD_MISSING));
    }
    }
    $this -> mFilter = 'BDD_NAME';
    $aProps = $this -> getProps ();
    foreach ($aProps as $sV) {
    $sKeyName = $aProps -> getInnerIterator () -> getSubIterator (0) -> key ();
    if (!empty ($aValues[$sKeyName])) {
    $aFields[] = $sV;
    if ($this -> aProps [$aProps -> getInnerIterator () -> getSubIterator (0) -> key ()]['TYPE'] === 'string') {
    $aVals[] = '\''.$aValues[$sKeyName].'\'';
    } else {
    $aVals[] = $aValues[$sKeyName];
    }
    }
    }
    $this -> mFilter = $sTmp;
    $sFields = implode (',', $aFields);
    $sVals = implode (',', $aVals);
    $sQuery = 'INSERT INTO '.$sTable.' ('.$sFields.') VALUES ('.$sVals.')' ;
    if ($this -> oDB -> query ($sQuery)) {
    $this -> oSession -> ID = $this -> oDB -> insert_id ();
    return true;
    }
    return false;
    }

    public function getUser ($iUserId, $sTable, $bSession = true) {
    $sTmp = $this -> mFilter;
    $this -> mFilter = 'BDD_NAME';
    $aProps = $this -> getProps ();
    foreach ($aProps as $sV) {
    $aFields[] = $sV;
    }
    $sFields = implode (',', $aFields);
    $sQuery = 'SELECT '.$sFields.' FROM '.$sTable.' WHERE '.$this -> aProps['ID']['BDD_NAME'].' = '.$iUserId;
    $this -> oDB -> query ($sQuery);
    $aRes = $this -> oDB -> fetch_assoc ();
    if (empty ($aRes)) {
    return false;
    }
    foreach ($aProps as $sV) {
    $sKeyName = $aProps -> getInnerIterator () -> getSubIterator (0) -> key ();
    $this -> aProps[$sKeyName]['VALUE'] = $aRes[$sV];
    // PHP5 < 5.1
    if (true === $bSession && true === $this -> oSession -> __isset ($sKeyName)) {
    $this -> oSession -> $sKeyName = $aRes[$sV];
    }
    /*PHP5 >= 5.1
    if (true === $bSession && true === isset ($this -> oSession -> $sKeyName)) {
    $this -> oSession -> $sKeyName = $aRes[$sV];
    }
    */
    }
    $this -> mFilter = $sTmp;
    return true;
    }

    public function modUser ($iUserId, $sTable, $aValues, $bSession = true) {
    $sTmp = $this -> mFilter;
    $this -> mFilter = 'BDD_NAME';
    $aProps = $this -> getProps ();
    foreach ($aProps as $sV) {
    $sKeyName = $aProps -> getInnerIterator () -> getSubIterator (0) -> key ();
    if (!empty ($aValues[$sKeyName])) {
    if ($this -> aProps [$aProps -> getInnerIterator () -> getSubIterator (0) -> key ()]['TYPE'] === 'string') {
    $aVals[] = $sV.'= \''.$aValues[$sKeyName].'\'';
    } else {
    $aVals[] = $sV.'='.$aValues[$sKeyName];
    }
    // PHP5 < 5.1
    if (true === $bSession && true === $this -> oSession -> __isset ($sKeyName)) {
    $this -> oSession -> $sKeyName = $aValues[$sKeyName];
    }
    }
    }
    $this -> mFilter = $sTmp;
    if (empty ($aVals)) {
    return false;
    }
    $sVals = implode (',', $aVals);
    $sQuery = 'UPDATE '.$sTable.' SET '.$sVals.' WHERE '.$this -> aProps['ID']['BDD_NAME'].' = '.$iUserId;
    if ($this -> oDB -> query ($sQuery)) {
    return true;
    }
    return false;
    }
    }
    ?>

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    - [PHP5] FORMCHECKER : data validation
    - SPL and ITERATOR : examples
    - Xml with Rss Feeds





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