Convert data retrieved from SQL into XML format_PHP tutorial
使用了php的PEAR和DB
// +----------------------------------------------------------------------+
// | PHP version 4.0
|// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group
|// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license,
|// | that is bundled with this package in the file LICENSE, and is
|// | available at through the world-wide-web at
|// | http://www.php.net/license/2_02.txt.
|// | If you did not receive a copy of the PHP license and are unable to
|// | obtain it through the world-wide-web, please send a note to
|// | license@php.net so we can mail you a copy immediately.
|// +----------------------------------------------------------------------+
// | Authors: Christian Stocker
|// +----------------------------------------------------------------------+
//
// $Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $
/**
* This class takes a PEAR::DB-Result Object, a sql-query-string or an array
* and returns a xml-representation of it.
*
* TODO
* -encoding etc, options for header
* -ERROR CHECKING
*
* Usage example
*
* include_once ("DB.php");
* include_once("XML/sql2xml.php");
* $db = DB::connect("mysql://root@localhost/xmltest");
* $sql2xml = new xml_sql2xml();
* //the next one is only needed, if you need others than the default
* $sql2xml->setEncoding("ISO-8859-1","UTF-8");
* $result = $db->query("select * from bands");
* $xmlstring = $sql2xml->getXML($result);
*
* or
*
* include_once ("DB.php");
* include_once("XML/sql2xml.php");
* $sql2xml = new xml_sql2xml("mysql://root@localhost/xmltest");
* $sql2xml->Add("select * from bands");
* $xmlstring = $sql2xml->getXML();
*
* More documentation and a tutorial/how-to can be found at
* http://php.chregu.tv/sql2xml
*
* @author Christian Stocker
* @version $Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $
* @package XML
*/
class XML_sql2xml {
/**
* If joined-tables should be output nested.
* Means, if you have joined two or more queries, the later
* specified tables will be nested within the result of the former
* table.
* Works at the moment only with mysql automagically. For other RDBMS
* you have to provide your table-relations by hand (see user_tableinfo)
*
* @var boolean
* @see $user_tableinfo, doSql2Xml(), doArray2Xml();
*/
var $nested = True;
/**
* Name of the tag element for resultsets
*
* @var string
* @see insertNewResult()
*/
var $tagNameResult = "result";
/**
* Name of the tag element for rows
*
* @var string
* @see insertNewRow()
*/
var $tagNameRow = "row";
/**
*
* @var object PEAR::DB
* @access private
*/
var $db = Null;
/**
* Options to be used in extended Classes (for example in sql2xml_ext).
* They are passed with SetOptions as an array (arrary("user_options" = array());
* and can then be accessed with $this->user_options["bla"] from your
* extended classes for additional features.
* This array is not use in this base class, it's only for passing easy parameters
* to extended classes.
*
* @var array
*/
var $user_options = array();
/**
* The DomDocument Object to be used in the whole class
*
* @var object DomDocument
* @access private
*/
var $xmldoc;
/**
* The Root of the domxml object
* I'm not sure, if we need this as a class variable....
* could be replaced by domxml_root($this->xmldoc);
*
* @var object DomNode
* @access private
*/
var $xmlroot;
/**
* This array is used to give the structure of your database to the class.
* It's especially useful, if you don't use mysql, since other RDBMS than
* mysql are not able at the moment to provide the right information about
* your database structure within the query. And if you have more than 2
* tables joined in the sql it's also not possible for mysql to find out
* your real relations.
* The parameters are the same as in fieldInfo from the PEAR::DB and some
* additional ones. Here they come:
* From PEAR::DB->fieldinfo:
*
* $tableInfo[$i]["table"] : the table, which field #$i belongs to.
* for some rdbms/comples queries and with arrays, it's impossible
* to find out to which table the field actually belongs. You can
* specify it here more accurate. Or if you want, that one fields
* belongs to another table, than it actually says (yes, there's
* use for that, see the upcoming tutorial ...)
*
* $tableInfo[$i]["name"] : the name of field #$i. if you want another
* name for the tag, than the query or your array provides, assign
* it here.
*
* Additional info
* $tableInfo["parent_key"][$table] : index of the parent key for $table.
* this is the field, where the programm looks for changes, if this
* field changes, it assumes, that we need a new "rowset" in the
* parent table.
*
* $tableInfo["parent_table"][$table]: name of the parent table for $table.
*
* @var array
* @access private
*/
var $user_tableInfo = array();
/**
* the encoding type, the input from the db has
*/
var $encoding_from = "ISO-8859-1";
/**
* the encoding type, the output in the xml should have
* (note that domxml at the moment only support UTF-8, or at least it looks like)
*/
var $encoding_to = "gb2312";
var $tagname = "tagname";
/**
* Constructor
* The Constructor can take a Pear::DB "data source name" (eg.
* "mysql://user:passwd@localhost/dbname") and will then connect
* to the DB, or a PEAR::DB object link, if you already connected
* the db before.
" If you provide nothing as $dsn, you only can later add stuff with
* a pear::db-resultset or as an array. providing sql-strings will
* not work.
* the $root param is used, if you want to provide another name for your
* root-tag than "root". if you give an empty string (""), there will be no
* root element created here, but only when you add a resultset/array/sql-string.
* And the first tag of this result is used as the root tag.
*
* @param mixed $dsn PEAR::DB "data source name" or object DB object
* @param string $root the name of the xml-doc root element.
* @access public
*/
function XML_sql2xml ($dsn = Null, $root = "root") {
// if it's a string, then it must be a dsn-identifier;
if (is_string($dsn))
{
include_once ("DB.php");
$this->db = DB::Connect($dsn);
if (DB::isError($this->db))
{
print "The given dsn for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";
return new DB_Error($this->db->code,PEAR_ERROR_DIE);
}
}
elseif (is_object($dsn) && DB::isError($dsn))
{
print "The given param for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";
return new DB_Error($dsn->code,PEAR_ERROR_DIE);
}
// if parent class is db_common, then it's already a connected identifier
elseif (get_parent_class($dsn) == "db_common")
{
$this->db = $dsn;
}
$this->xmldoc = domxml_new_xmldoc('1.0');
//oehm, seems not to work, unfortunately.... does anybody know a solution?
$this->xmldoc->encoding = $this->encoding_to;
if ($root) {
$this->xmlroot = $this->xmldoc->add_root($root);
//PHP 4.0.6 had $root->name as tagname, check for that here...
if (!isset($this->xmlroot->{$this->tagname}))
{
$this->tagname = "name";
}
}
}
/**
* General method for adding new resultsets to the xml-object
* Give a sql-query-string, a pear::db_result object or an array as
* input parameter, and the method calls the appropriate method for this
* input and adds this to $this->xmldoc
*
* @param string sql-string, or object db_result, or array
* @param mixed additional parameters for the following functions
* @access public
* @see addResult(), addSql(), addArray(), addXmlFile()
*/
function add ($resultset, $params = Null)
{
// if string, then it's a query, a xml-file or a xml-string...
if (is_string($resultset)) {
if (preg_match("/.xml$/",$resultset)) {
$this->AddXmlFile($resultset,$params);
}
elseif (preg_match("/.*select.*from.*/i" , $resultset)) {
$this->AddSql($resultset);
}
else {
$this->AddXmlString($resultset);
}
}
// if array, then it's an array...
elseif (is_array($resultset)) {
$this->AddArray($resultset);
}
if (get_class($resultset) == "db_result") {
$this->AddResult($resultset);
}
}
/**
* Adds the content of a xml-file to $this->xmldoc, on the same level
* as a normal resultset (mostly just below
*
* @param string filename
* @param mixed xpath either a string with the xpath expression or an array with "xpath"=>xpath expression and "root"=tag/subtag/etc, which are the tags to be inserted before the result
* @access public
* @see doXmlString2Xml()
*/
function addXmlFile($file,$xpath = Null)
{
$fd = fopen( $file, "r" );
$content = fread( $fd, filesize( $file ) );
fclose( $fd );
$this->doXmlString2Xml($content,$xpath);
}
/**
* Adds the content of a xml-string to $this->xmldoc, on the same level
* as a normal resultset (mostly just below
*
* @param string xml
* @param mixed xpath either a string with the xpath expression or an array with "xpath"=>xpath expression and "root"=tag/subtag/etc, which are the tags to be inserted before the result
* @access public
* @see doXmlString2Xml()
*/

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

WebStorm Mac version
Useful JavaScript development tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Atom editor mac version download
The most popular open source editor