simple.php

This is a simple example that demonstrate how to use the Zorba XQuery Engine to create, compile, and execute queries.

<?php
/*
 * Copyright 2006-2008 The FLWOR Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
require '/home/pfkeb/zorba/branches/0.9.5-rc1/doc/php/examples/zorba_api.php';

function example_1(Zorba $aZorba)
{
  $lQuery = $aZorba->compileQuery('1+1');
  echo $lQuery->execute();
  $lQuery->destroy();
  return true;
}

function example_2(Zorba $aZorba)
{
  $lQuery = $aZorba->compileQuery('1+1');
  $lIterator = $lQuery->iterator();
  $lIterator->open();
  $lItem = Item::createEmptyItem();
  while($lIterator->next($lItem))
  {
    echo $lItem->getStringValue() . "\n";
  }
  $lIterator->close();
  $lIterator->destroy();
  $lQuery->destroy();
  return true;
}


function example_3(Zorba $aZorba)
{
  $lQuery = $aZorba->compileQuery('1 div 0');
  try {
    echo $lQuery->execute();
  } catch ( Exception $e ) {
    echo $e->getMessage() . "\n";
    $lQuery->destroy();
    return true;
  }
  $lQuery->destroy();
  return false;
}

function example_4(Zorba $aZorba)
{
  try {
    $lQuery = $aZorba->compileQuery('for $i in (1,2,3)');
  } catch ( Exception $e ) {
    echo $e->getMessage() . "\n";
    return true;
  }
  return false;
}

function example_5(Zorba $aZorba)
{
  $lDataManager = $aZorba->getXmlDataManager();
  $lDataManager->loadDocument("books.xml", "<books><book>Book 1</book><book>Book 2</book></books>");
  $lQuery = $aZorba->compileQuery("doc('books.xml')//book");
  echo $lQuery->execute();
  $lQuery->destroy();
  return true;
}

function example_6(Zorba $aZorba)
{
  $lDataManager = $aZorba->getXmlDataManager();
  $lDataManager->loadDocument("books.xml", "<books><book>Book 1</book><book>Book 2</book></books>");
  $lQuery1 = $aZorba->compileQuery("insert node <book>Book 3</book> into doc('books.xml')/books");
  if($lQuery1->isUpdateQuery())
  {
    $lQuery1->applyUpdates();
  }
  $lQuery2 = $aZorba->compileQuery("doc('books.xml')//book");
  echo $lQuery2->execute();
  $lQuery1->destroy();
  $lQuery2->destroy();
  return true;
}

$store = InMemoryStore::getInstance();
$zorba = Zorba::getInstance($store);

print "Example1:\n";
$res = example_1($zorba);
assert($res);
print "\n\n";

print "Example2:\n";
$res = example_2($zorba);
assert($res);
print "\n\n";

print "Example3:\n";
$res = example_3($zorba);
assert($res);
print "\n\n";

print "Example4:\n";
$res = example_4($zorba);
assert($res);
print "\n\n";

print "Example5:\n";
$res = example_5($zorba);
assert($res);
print "\n\n";

print "Example6:\n";
$res = example_6($zorba);
assert($res);
print "\n\n";

$zorba->shutdown();
InMemoryStore::shutdown($store);
?>