| Current File : //proc/thread-self/root/opt/alt/php71/usr/share/pear/XML/Util.php |
<?php
/**
* XML_Util
*
* XML Utilities package
*
* PHP versions 4 and 5
*
* LICENSE:
*
* Copyright (c) 2003-2008 Stephan Schmidt <schst@php.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category XML
* @package XML_Util
* @author Stephan Schmidt <schst@php.net>
* @copyright 2003-2008 Stephan Schmidt <schst@php.net>
* @license http://opensource.org/licenses/bsd-license New BSD License
* @version CVS: $Id$
* @link http://pear.php.net/package/XML_Util
*/
/**
* Error code for invalid chars in XML name
*/
define('XML_UTIL_ERROR_INVALID_CHARS', 51);
/**
* Error code for invalid chars in XML name
*/
define('XML_UTIL_ERROR_INVALID_START', 52);
/**
* Error code for non-scalar tag content
*/
define('XML_UTIL_ERROR_NON_SCALAR_CONTENT', 60);
/**
* Error code for missing tag name
*/
define('XML_UTIL_ERROR_NO_TAG_NAME', 61);
/**
* Replace XML entities
*/
define('XML_UTIL_REPLACE_ENTITIES', 1);
/**
* Embedd content in a CData Section
*/
define('XML_UTIL_CDATA_SECTION', 5);
/**
* Do not replace entitites
*/
define('XML_UTIL_ENTITIES_NONE', 0);
/**
* Replace all XML entitites
* This setting will replace <, >, ", ' and &
*/
define('XML_UTIL_ENTITIES_XML', 1);
/**
* Replace only required XML entitites
* This setting will replace <, " and &
*/
define('XML_UTIL_ENTITIES_XML_REQUIRED', 2);
/**
* Replace HTML entitites
* @link http://www.php.net/htmlentities
*/
define('XML_UTIL_ENTITIES_HTML', 3);
/**
* Do not collapse any empty tags.
*/
define('XML_UTIL_COLLAPSE_NONE', 0);
/**
* Collapse all empty tags.
*/
define('XML_UTIL_COLLAPSE_ALL', 1);
/**
* Collapse only empty XHTML tags that have no end tag.
*/
define('XML_UTIL_COLLAPSE_XHTML_ONLY', 2);
/**
* Utility class for working with XML documents
*
* @category XML
* @package XML_Util
* @author Stephan Schmidt <schst@php.net>
* @copyright 2003-2008 Stephan Schmidt <schst@php.net>
* @license http://opensource.org/licenses/bsd-license New BSD License
* @version Release: 1.4.4
* @link http://pear.php.net/package/XML_Util
*/
class XML_Util
{
/**
* Return API version
*
* @return string $version API version
*/
public static function apiVersion()
{
return '1.4';
}
/**
* Replace XML entities
*
* With the optional second parameter, you may select, which
* entities should be replaced.
*
* <code>
* require_once 'XML/Util.php';
*
* // replace XML entites:
* $string = XML_Util::replaceEntities('This string contains < & >.');
* </code>
*
* With the optional third parameter, you may pass the character encoding
* <code>
* require_once 'XML/Util.php';
*
* // replace XML entites in UTF-8:
* $string = XML_Util::replaceEntities(
* 'This string contains < & > as well as ä, ö, ß, à and ê',
* XML_UTIL_ENTITIES_HTML,
* 'UTF-8'
* );
* </code>
*
* @param string $string string where XML special chars
* should be replaced
* @param int $replaceEntities setting for entities in attribute values
* (one of XML_UTIL_ENTITIES_XML,
* XML_UTIL_ENTITIES_XML_REQUIRED,
* XML_UTIL_ENTITIES_HTML)
* @param string $encoding encoding value (if any)...
* must be a valid encoding as determined
* by the htmlentities() function
*
* @return string string with replaced chars
* @see reverseEntities()
*/
public static function replaceEntities(
$string, $replaceEntities = XML_UTIL_ENTITIES_XML, $encoding = 'ISO-8859-1'
) {
switch ($replaceEntities) {
case XML_UTIL_ENTITIES_XML:
return strtr(
$string,
array(
'&' => '&',
'>' => '>',
'<' => '<',
'"' => '"',
'\'' => '''
)
);
break;
case XML_UTIL_ENTITIES_XML_REQUIRED:
return strtr(
$string,
array(
'&' => '&',
'<' => '<',
'"' => '"'
)
);
break;
case XML_UTIL_ENTITIES_HTML:
return htmlentities($string, ENT_COMPAT, $encoding);
break;
}
return $string;
}
/**
* Reverse XML entities
*
* With the optional second parameter, you may select, which
* entities should be reversed.
*
* <code>
* require_once 'XML/Util.php';
*
* // reverse XML entites:
* $string = XML_Util::reverseEntities('This string contains < & >.');
* </code>
*
* With the optional third parameter, you may pass the character encoding
* <code>
* require_once 'XML/Util.php';
*
* // reverse XML entites in UTF-8:
* $string = XML_Util::reverseEntities(
* 'This string contains < & > as well as'
* . ' ä, ö, ß, à and ê',
* XML_UTIL_ENTITIES_HTML,
* 'UTF-8'
* );
* </code>
*
* @param string $string string where XML special chars
* should be replaced
* @param int $replaceEntities setting for entities in attribute values
* (one of XML_UTIL_ENTITIES_XML,
* XML_UTIL_ENTITIES_XML_REQUIRED,
* XML_UTIL_ENTITIES_HTML)
* @param string $encoding encoding value (if any)...
* must be a valid encoding as determined
* by the html_entity_decode() function
*
* @return string string with replaced chars
* @see replaceEntities()
*/
public static function reverseEntities(
$string, $replaceEntities = XML_UTIL_ENTITIES_XML, $encoding = 'ISO-8859-1'
) {
switch ($replaceEntities) {
case XML_UTIL_ENTITIES_XML:
return strtr(
$string,
array(
'&' => '&',
'>' => '>',
'<' => '<',
'"' => '"',
''' => '\''
)
);
break;
case XML_UTIL_ENTITIES_XML_REQUIRED:
return strtr(
$string,
array(
'&' => '&',
'<' => '<',
'"' => '"'
)
);
break;
case XML_UTIL_ENTITIES_HTML:
return html_entity_decode($string, ENT_COMPAT, $encoding);
break;
}
return $string;
}
/**
* Build an xml declaration
*
* <code>
* require_once 'XML/Util.php';
*
* // get an XML declaration:
* $xmlDecl = XML_Util::getXMLDeclaration('1.0', 'UTF-8', true);
* </code>
*
* @param string $version xml version
* @param string $encoding character encoding
* @param bool $standalone document is standalone (or not)
*
* @return string xml declaration
* @uses attributesToString() to serialize the attributes of the
* XML declaration
*/
public static function getXMLDeclaration(
$version = '1.0', $encoding = null, $standalone = null
) {
$attributes = array(
'version' => $version,
);
// add encoding
if ($encoding !== null) {
$attributes['encoding'] = $encoding;
}
// add standalone, if specified
if ($standalone !== null) {
$attributes['standalone'] = $standalone ? 'yes' : 'no';
}
return sprintf(
'<?xml%s?>',
XML_Util::attributesToString($attributes, false)
);
}
/**
* Build a document type declaration
*
* <code>
* require_once 'XML/Util.php';
*
* // get a doctype declaration:
* $xmlDecl = XML_Util::getDocTypeDeclaration('rootTag','myDocType.dtd');
* </code>
*
* @param string $root name of the root tag
* @param string $uri uri of the doctype definition
* (or array with uri and public id)
* @param string $internalDtd internal dtd entries
*
* @return string doctype declaration
* @since 0.2
*/
public static function getDocTypeDeclaration(
$root, $uri = null, $internalDtd = null
) {
if (is_array($uri)) {
$ref = sprintf(' PUBLIC "%s" "%s"', $uri['id'], $uri['uri']);
} elseif (!empty($uri)) {
$ref = sprintf(' SYSTEM "%s"', $uri);
} else {
$ref = '';
}
if (empty($internalDtd)) {
return sprintf('<!DOCTYPE %s%s>', $root, $ref);
} else {
return sprintf("<!DOCTYPE %s%s [\n%s\n]>", $root, $ref, $internalDtd);
}
}
/**
* Create string representation of an attribute list
*
* <code>
* require_once 'XML/Util.php';
*
* // build an attribute string
* $att = array(
* 'foo' => 'bar',
* 'argh' => 'tomato'
* );
*
* $attList = XML_Util::attributesToString($att);
* </code>
*
* @param array $attributes attribute array
* @param bool|array $sort sort attribute list alphabetically,
* may also be an assoc array containing
* the keys 'sort', 'multiline', 'indent',
* 'linebreak' and 'entities'
* @param bool $multiline use linebreaks, if more than
* one attribute is given
* @param string $indent string used for indentation of
* multiline attributes
* @param string $linebreak string used for linebreaks of
* multiline attributes
* @param int $entities setting for entities in attribute values
* (one of XML_UTIL_ENTITIES_NONE,
* XML_UTIL_ENTITIES_XML,
* XML_UTIL_ENTITIES_XML_REQUIRED,
* XML_UTIL_ENTITIES_HTML)
*
* @return string string representation of the attributes
* @uses replaceEntities() to replace XML entities in attribute values
* @todo allow sort also to be an options array
*/
public static function attributesToString(
$attributes, $sort = true, $multiline = false,
$indent = ' ', $linebreak = "\n", $entities = XML_UTIL_ENTITIES_XML
) {
/*
* second parameter may be an array
*/
if (is_array($sort)) {
if (isset($sort['multiline'])) {
$multiline = $sort['multiline'];
}
if (isset($sort['indent'])) {
$indent = $sort['indent'];
}
if (isset($sort['linebreak'])) {
$multiline = $sort['linebreak'];
}
if (isset($sort['entities'])) {
$entities = $sort['entities'];
}
if (isset($sort['sort'])) {
$sort = $sort['sort'];
} else {
$sort = true;
}
}
$string = '';
if (is_array($attributes) && !empty($attributes)) {
if ($sort) {
ksort($attributes);
}
if (!$multiline || count($attributes) == 1) {
foreach ($attributes as $key => $value) {
if ($entities != XML_UTIL_ENTITIES_NONE) {
if ($entities === XML_UTIL_CDATA_SECTION) {
$entities = XML_UTIL_ENTITIES_XML;
}
$value = XML_Util::replaceEntities($value, $entities);
}
$string .= ' ' . $key . '="' . $value . '"';
}
} else {
$first = true;
foreach ($attributes as $key => $value) {
if ($entities != XML_UTIL_ENTITIES_NONE) {
$value = XML_Util::replaceEntities($value, $entities);
}
if ($first) {
$string .= ' ' . $key . '="' . $value . '"';
$first = false;
} else {
$string .= $linebreak . $indent . $key . '="' . $value . '"';
}
}
}
}
return $string;
}
/**
* Collapses empty tags.
*
* @param string $xml XML
* @param int $mode Whether to collapse all empty tags (XML_UTIL_COLLAPSE_ALL)
* or only XHTML (XML_UTIL_COLLAPSE_XHTML_ONLY) ones.
*
* @return string XML
*/
public static function collapseEmptyTags($xml, $mode = XML_UTIL_COLLAPSE_ALL)
{
if (preg_match('~<([^>])+/>~s', $xml, $matches)) {
// it's already an empty tag
return $xml;
}
switch ($mode) {
case XML_UTIL_COLLAPSE_ALL:
$preg1 =
'~<' .
'(?:' .
'(https?://[^:\s]+:\w+)' . // <http://foo.com:bar ($1)
'|(\w+:\w+)' . // <foo:bar ($2)
'|(\w+)' . // <foo ($3)
')+' .
'([^>]*)' . // attributes ($4)
'>' .
'<\/(\1|\2|\3)>' . // 1, 2, or 3 again ($5)
'~s'
;
$preg2 =
'<' .
'${1}${2}${3}' . // tag (only one should have been populated)
'${4}' . // attributes
' />'
;
return (preg_replace($preg1, $preg2, $xml)?:$xml);
break;
case XML_UTIL_COLLAPSE_XHTML_ONLY:
return (
preg_replace(
'/<(area|base(?:font)?|br|col|frame|hr|img|input|isindex|link|meta|'
. 'param)([^>]*)><\/\\1>/s',
'<\\1\\2 />',
$xml
) ?: $xml
);
break;
case XML_UTIL_COLLAPSE_NONE:
// fall thru
default:
return $xml;
}
}
/**
* Create a tag
*
* This method will call XML_Util::createTagFromArray(), which
* is more flexible.
*
* <code>
* require_once 'XML/Util.php';
*
* // create an XML tag:
* $tag = XML_Util::createTag('myNs:myTag',
* array('foo' => 'bar'),
* 'This is inside the tag',
* 'http://www.w3c.org/myNs#');
* </code>
*
* @param string $qname qualified tagname (including namespace)
* @param array $attributes array containg attributes
* @param mixed $content the content
* @param string $namespaceUri URI of the namespace
* @param int $replaceEntities whether to replace XML special chars in
* content, embedd it in a CData section
* or none of both
* @param bool $multiline whether to create a multiline tag where
* each attribute gets written to a single line
* @param string $indent string used to indent attributes
* (_auto indents attributes so they start
* at the same column)
* @param string $linebreak string used for linebreaks
* @param bool $sortAttributes Whether to sort the attributes or not
* @param int $collapseTagMode How to handle a content-less, and thus collapseable, tag
*
* @return string XML tag
* @see createTagFromArray()
* @uses createTagFromArray() to create the tag
*/
public static function createTag(
$qname, $attributes = array(), $content = null,
$namespaceUri = null, $replaceEntities = XML_UTIL_REPLACE_ENTITIES,
$multiline = false, $indent = '_auto', $linebreak = "\n",
$sortAttributes = true, $collapseTagMode = XML_UTIL_COLLAPSE_ALL
) {
$tag = array(
'qname' => $qname,
'attributes' => $attributes
);
// add tag content
if ($content !== null) {
$tag['content'] = $content;
}
// add namespace Uri
if ($namespaceUri !== null) {
$tag['namespaceUri'] = $namespaceUri;
}
return XML_Util::createTagFromArray(
$tag, $replaceEntities, $multiline,
$indent, $linebreak, $sortAttributes,
$collapseTagMode
);
}
/**
* Create a tag from an array.
* This method awaits an array in the following format
* <pre>
* array(
* // qualified name of the tag
* 'qname' => $qname
*
* // namespace prefix (optional, if qname is specified or no namespace)
* 'namespace' => $namespace
*
* // local part of the tagname (optional, if qname is specified)
* 'localpart' => $localpart,
*
* // array containing all attributes (optional)
* 'attributes' => array(),
*
* // tag content (optional)
* 'content' => $content,
*
* // namespaceUri for the given namespace (optional)
* 'namespaceUri' => $namespaceUri
* )
* </pre>
*
* <code>
* require_once 'XML/Util.php';
*
* $tag = array(
* 'qname' => 'foo:bar',
* 'namespaceUri' => 'http://foo.com',
* 'attributes' => array('key' => 'value', 'argh' => 'fruit&vegetable'),
* 'content' => 'I\'m inside the tag',
* );
* // creating a tag with qualified name and namespaceUri
* $string = XML_Util::createTagFromArray($tag);
* </code>
*
* @param array $tag tag definition
* @param int $replaceEntities whether to replace XML special chars in
* content, embedd it in a CData section
* or none of both
* @param bool $multiline whether to create a multiline tag where each
* attribute gets written to a single line
* @param string $indent string used to indent attributes
* (_auto indents attributes so they start
* at the same column)
* @param string $linebreak string used for linebreaks
* @param bool $sortAttributes Whether to sort the attributes or not
* @param int $collapseTagMode How to handle a content-less, and thus collapseable, tag
*
* @return string XML tag
*
* @see createTag()
* @uses attributesToString() to serialize the attributes of the tag
* @uses splitQualifiedName() to get local part and namespace of a qualified name
* @uses createCDataSection()
* @uses collapseEmptyTags()
* @uses raiseError()
*/
public static function createTagFromArray(
$tag, $replaceEntities = XML_UTIL_REPLACE_ENTITIES,
$multiline = false, $indent = '_auto', $linebreak = "\n",
$sortAttributes = true, $collapseTagMode = XML_UTIL_COLLAPSE_ALL
) {
if (isset($tag['content']) && !is_scalar($tag['content'])) {
return XML_Util::raiseError(
'Supplied non-scalar value as tag content',
XML_UTIL_ERROR_NON_SCALAR_CONTENT
);
}
if (!isset($tag['qname']) && !isset($tag['localPart'])) {
return XML_Util::raiseError(
'You must either supply a qualified name '
. '(qname) or local tag name (localPart).',
XML_UTIL_ERROR_NO_TAG_NAME
);
}
// if no attributes hav been set, use empty attributes
if (!isset($tag['attributes']) || !is_array($tag['attributes'])) {
$tag['attributes'] = array();
}
if (isset($tag['namespaces'])) {
foreach ($tag['namespaces'] as $ns => $uri) {
$tag['attributes']['xmlns:' . $ns] = $uri;
}
}
if (!isset($tag['qname'])) {
// qualified name is not given
// check for namespace
if (isset($tag['namespace']) && !empty($tag['namespace'])) {
$tag['qname'] = $tag['namespace'] . ':' . $tag['localPart'];
} else {
$tag['qname'] = $tag['localPart'];
}
} elseif (isset($tag['namespaceUri']) && !isset($tag['namespace'])) {
// namespace URI is set, but no namespace
$parts = XML_Util::splitQualifiedName($tag['qname']);
$tag['localPart'] = $parts['localPart'];
if (isset($parts['namespace'])) {
$tag['namespace'] = $parts['namespace'];
}
}
if (isset($tag['namespaceUri']) && !empty($tag['namespaceUri'])) {
// is a namespace given
if (isset($tag['namespace']) && !empty($tag['namespace'])) {
$tag['attributes']['xmlns:' . $tag['namespace']]
= $tag['namespaceUri'];
} else {
// define this Uri as the default namespace
$tag['attributes']['xmlns'] = $tag['namespaceUri'];
}
}
if (!array_key_exists('content', $tag)) {
$tag['content'] = '';
}
// check for multiline attributes
if ($multiline === true) {
if ($indent === '_auto') {
$indent = str_repeat(' ', (strlen($tag['qname'])+2));
}
}
// create attribute list
$attList = XML_Util::attributesToString(
$tag['attributes'],
$sortAttributes, $multiline, $indent, $linebreak
);
switch ($replaceEntities) {
case XML_UTIL_ENTITIES_NONE:
break;
case XML_UTIL_CDATA_SECTION:
$tag['content'] = XML_Util::createCDataSection($tag['content']);
break;
default:
$tag['content'] = XML_Util::replaceEntities(
$tag['content'], $replaceEntities
);
break;
}
$tag = sprintf(
'<%s%s>%s</%s>', $tag['qname'], $attList, $tag['content'],
$tag['qname']
);
return self::collapseEmptyTags($tag, $collapseTagMode);
}
/**
* Create a start element
*
* <code>
* require_once 'XML/Util.php';
*
* // create an XML start element:
* $tag = XML_Util::createStartElement('myNs:myTag',
* array('foo' => 'bar') ,'http://www.w3c.org/myNs#');
* </code>
*
* @param string $qname qualified tagname (including namespace)
* @param array $attributes array containg attributes
* @param string $namespaceUri URI of the namespace
* @param bool $multiline whether to create a multiline tag where each
* attribute gets written to a single line
* @param string $indent string used to indent attributes (_auto indents
* attributes so they start at the same column)
* @param string $linebreak string used for linebreaks
* @param bool $sortAttributes Whether to sort the attributes or not
*
* @return string XML start element
* @see createEndElement(), createTag()
*/
public static function createStartElement(
$qname, $attributes = array(), $namespaceUri = null,
$multiline = false, $indent = '_auto', $linebreak = "\n",
$sortAttributes = true
) {
// if no attributes hav been set, use empty attributes
if (!isset($attributes) || !is_array($attributes)) {
$attributes = array();
}
if ($namespaceUri != null) {
$parts = XML_Util::splitQualifiedName($qname);
}
// check for multiline attributes
if ($multiline === true) {
if ($indent === '_auto') {
$indent = str_repeat(' ', (strlen($qname)+2));
}
}
if ($namespaceUri != null) {
// is a namespace given
if (isset($parts['namespace']) && !empty($parts['namespace'])) {
$attributes['xmlns:' . $parts['namespace']] = $namespaceUri;
} else {
// define this Uri as the default namespace
$attributes['xmlns'] = $namespaceUri;
}
}
// create attribute list
$attList = XML_Util::attributesToString(
$attributes, $sortAttributes,
$multiline, $indent, $linebreak
);
$element = sprintf('<%s%s>', $qname, $attList);
return $element;
}
/**
* Create an end element
*
* <code>
* require_once 'XML/Util.php';
*
* // create an XML start element:
* $tag = XML_Util::createEndElement('myNs:myTag');
* </code>
*
* @param string $qname qualified tagname (including namespace)
*
* @return string XML end element
* @see createStartElement(), createTag()
*/
public static function createEndElement($qname)
{
$element = sprintf('</%s>', $qname);
return $element;
}
/**
* Create an XML comment
*
* <code>
* require_once 'XML/Util.php';
*
* // create an XML start element:
* $tag = XML_Util::createComment('I am a comment');
* </code>
*
* @param string $content content of the comment
*
* @return string XML comment
*/
public static function createComment($content)
{
$comment = sprintf('<!-- %s -->', $content);
return $comment;
}
/**
* Create a CData section
*
* <code>
* require_once 'XML/Util.php';
*
* // create a CData section
* $tag = XML_Util::createCDataSection('I am content.');
* </code>
*
* @param string $data data of the CData section
*
* @return string CData section with content
*/
public static function createCDataSection($data)
{
return sprintf(
'<![CDATA[%s]]>',
preg_replace('/\]\]>/', ']]]]><![CDATA[>', strval($data))
);
}
/**
* Split qualified name and return namespace and local part
*
* <code>
* require_once 'XML/Util.php';
*
* // split qualified tag
* $parts = XML_Util::splitQualifiedName('xslt:stylesheet');
* </code>
* the returned array will contain two elements:
* <pre>
* array(
* 'namespace' => 'xslt',
* 'localPart' => 'stylesheet'
* );
* </pre>
*
* @param string $qname qualified tag name
* @param string $defaultNs default namespace (optional)
*
* @return array array containing namespace and local part
*/
public static function splitQualifiedName($qname, $defaultNs = null)
{
if (strstr($qname, ':')) {
$tmp = explode(':', $qname);
return array(
'namespace' => $tmp[0],
'localPart' => $tmp[1]
);
}
return array(
'namespace' => $defaultNs,
'localPart' => $qname
);
}
/**
* Check, whether string is valid XML name
*
* <p>XML names are used for tagname, attribute names and various
* other, lesser known entities.</p>
* <p>An XML name may only consist of alphanumeric characters,
* dashes, undescores and periods, and has to start with a letter
* or an underscore.</p>
*
* <code>
* require_once 'XML/Util.php';
*
* // verify tag name
* $result = XML_Util::isValidName('invalidTag?');
* if (is_a($result, 'PEAR_Error')) {
* print 'Invalid XML name: ' . $result->getMessage();
* }
* </code>
*
* @param string $string string that should be checked
*
* @return mixed true, if string is a valid XML name, PEAR error otherwise
*
* @todo support for other charsets
* @todo PEAR CS - unable to avoid 85-char limit on second preg_match
*/
public static function isValidName($string)
{
// check for invalid chars
if (!preg_match('/^[[:alpha:]_]\\z/', $string[0])) {
return XML_Util::raiseError(
'XML names may only start with letter or underscore',
XML_UTIL_ERROR_INVALID_START
);
}
// check for invalid chars
$match = preg_match(
'/^([[:alpha:]_]([[:alnum:]\-\.]*)?:)?'
. '[[:alpha:]_]([[:alnum:]\_\-\.]+)?\\z/',
$string
);
if (!$match) {
return XML_Util::raiseError(
'XML names may only contain alphanumeric '
. 'chars, period, hyphen, colon and underscores',
XML_UTIL_ERROR_INVALID_CHARS
);
}
// XML name is valid
return true;
}
/**
* Replacement for XML_Util::raiseError
*
* Avoids the necessity to always require
* PEAR.php
*
* @param string $msg error message
* @param int $code error code
*
* @return PEAR_Error
* @todo PEAR CS - should this use include_once instead?
*/
public static function raiseError($msg, $code)
{
include_once 'PEAR.php';
return PEAR::raiseError($msg, $code);
}
}
?>