function testIt()
{
$dummy = new DummyObjectX();
$dummy->foo = null;
$res = PHPTAL_Context::path($dummy, 'method');
$this->assertEquals('__call', $res);
$res = phptal_path($dummy, 'foo');
$this->assertEquals(null, $res);
}
/**
* Handles variable accesses for the tal path resolver
*
* @param string $var The variable name to check
*
* @return Mixed An object/array if the path is not over or a boolean
*
* @todo replace the PHPTAL_Context::path() with custom code
*/
public function __get($var)
{
// When the iterator item is empty we just let the tal
// expression consume by continuously returning this
// same object which should evaluate to true for 'last'
if (is_null($this->data)) {
return $this;
}
// Find the requested variable
$value = PHPTAL_Context::path($this->data, $var, true);
// Check if it's an object or an array
if (is_array($value) || is_object($value)) {
// Move the context to the requested variable and return
$this->data = $value;
$this->addVarName($var);
return $this;
}
// get a hash of the variable contents
$hash = md5($value);
// compute a path for the variable to use as dictionary key
$path = $this->branch . $this->getVarPath() . $var;
// If we don't know about this var store in the dictionary
if (!isset($this->cache[$path])) {
if (!isset($this->dict[$path])) {
$this->dict[$path] = $hash;
$res = $this->branch === 'F';
} else {
// Check if the value has changed
if ($this->dict[$path] !== $hash) {
$this->dict[$path] = $hash;
$res = true;
} else {
$res = false;
}
}
$this->cache[$path] = $res;
}
return $this->cache[$path];
}
/**
* Resolve TALES path starting from the first path element.
* The TALES path : object/method1/10/method2
* will call : $ctx->path($ctx->object, 'method1/10/method2')
*
* This function is very important for PHPTAL performance.
*
* This function will become non-static in the future
*
* @param mixed $base first element of the path ($ctx)
* @param string $path rest of the path
* @param bool $nothrow is used by phptal_exists(). Prevents this function from
* throwing an exception when a part of the path cannot be resolved, null is
* returned instead.
*
* @access private
* @return mixed
*/
public static function path($base, $path, $nothrow = false)
{
if ($base === null) {
if ($nothrow) {
return null;
}
PHPTAL_Context::pathError($base, $path, $path);
}
foreach (explode('/', $path) as $current) {
// object handling
if (is_object($base)) {
// look for method. Both method_exists and is_callable are required because of __call() and protected methods
if (method_exists($base, $current) && is_callable(array($base, $current))) {
$base = $base->{$current}();
continue;
}
// look for property
if (property_exists($base, $current)) {
$base = $base->{$current};
continue;
}
if ($base instanceof ArrayAccess && $base->offsetExists($current)) {
$base = $base->offsetGet($current);
continue;
}
if ($base instanceof Countable && ($current === 'length' || $current === 'size')) {
$base = count($base);
continue;
}
// look for isset (priority over __get)
if (method_exists($base, '__isset')) {
if ($base->__isset($current)) {
$base = $base->{$current};
continue;
}
} elseif (method_exists($base, '__get')) {
$tmp = $base->{$current};
if (null !== $tmp) {
$base = $tmp;
continue;
}
}
// magic method call
if (method_exists($base, '__call')) {
try {
$base = $base->__call($current, array());
continue;
} catch (BadMethodCallException $e) {
}
}
if ($nothrow) {
return null;
}
PHPTAL_Context::pathError($base, $path, $current);
}
// array handling
if (is_array($base)) {
// key or index
if (array_key_exists((string) $current, $base)) {
$base = $base[$current];
continue;
}
// virtual methods provided by phptal
if ($current == 'length' || $current == 'size') {
$base = count($base);
continue;
}
if ($nothrow) {
return null;
}
PHPTAL_Context::pathError($base, $path, $current);
}
// string handling
if (is_string($base)) {
// virtual methods provided by phptal
if ($current == 'length' || $current == 'size') {
$base = strlen($base);
continue;
}
// access char at index
if (is_numeric($current)) {
$base = $base[$current];
continue;
}
}
// if this point is reached, then the part cannot be resolved
if ($nothrow) {
return null;
}
PHPTAL_Context::pathError($base, $path, $current);
}
return $base;
}
function testZeroIndex()
{
$data = array(1, 0, 3);
$result = PHPTAL_Context::path($data, '0');
$this->assertEquals(1, $result);
}
