PHP生成plist数据的方法

<?php
/**
 * propertylist class
 * implements writing apple property list (.plist) xml and text files from an array.
 *
 * @author jesus a. alvarez <zydeco@namedfork.net>
 */
function plist_encode_text ($obj) {
$plist = new propertylist($obj);
return $plist->text();
}
function plist_encode_xml ($obj) {
$plist = new propertylist($obj);
return $plist->xml();
}
class propertylist
{
private $obj, $xml, $text;
public function __construct ($obj) {
$this->obj = $obj;
}
private static function is_assoc ($array) {
return (is_array($array) && 0 !== count(array_diff_key($array, array_keys(array_keys($array)))));
}
public function xml () {
if (isset($this->xml)) return $this->xml;
$x = new xmlwriter();
$x->openmemory();
$x->setindent(true);
$x->startdocument('1.0', 'utf-8');
$x->writedtd('plist', '-//apple//dtd plist 1.0//en', 'http://www.apple.com/dtds/propertylist-1.0.dtd');
$x->startelement('plist');
$x->writeattribute('version', '1.0');
$this->xmlwritevalue($x, $this->obj);
$x->endelement(); // plist
$x->enddocument();
$this->xml = $x->outputmemory();
return $this->xml;
}
public function text() {
if (isset($this->text)) return $this->text;
$text = '';
$this->textwritevalue($text, $this->obj);
$this->text = $text;
return $this->text;
}
private function xmlwritedict(xmlwriter $x, &$dict) {
$x->startelement('dict');
foreach($dict as $k => &$v) {
$x->writeelement('key', $k);
$this->xmlwritevalue($x, $v);
}
$x->endelement(); // dict
}
private function xmlwritearray(xmlwriter $x, &$arr) {
$x->startelement('array');
foreach($arr as &$v)
$this->xmlwritevalue($x, $v);
$x->endelement(); // array
}
private function xmlwritevalue(xmlwriter $x, &$v) {
if (is_int($v) || is_long($v))
$x->writeelement('integer', $v);
elseif (is_float($v) || is_real($v) || is_double($v))
$x->writeelement('real', $v);
elseif (is_string($v))
$x->writeelement('string', $v);
elseif (is_bool($v))
$x->writeelement($v?'true':'false');
elseif (propertylist::is_assoc($v))
$this->xmlwritedict($x, $v);
elseif (is_array($v))
$this->xmlwritearray($x, $v);
elseif (is_a($v, 'plistdata'))
$x->writeelement('data', $v->base64encodeddata());
elseif (is_a($v, 'plistdate'))
$x->writeelement('date', $v->encodeddate());
else {
trigger_error("unsupported data type in plist ($v)", e_user_warning);
$x->writeelement('string', $v);
}
}
private function textwritevalue(&$text, &$v, $indentlevel = 0) {
if (is_int($v) || is_long($v))
$text .= sprintf("%d", $v);
elseif (is_float($v) || is_real($v) || is_double($v))
$text .= sprintf("%g", $v);
elseif (is_string($v))
$this->textwritestring($text, $v);
elseif (is_bool($v))
$text .= $v?'yes':'no';
elseif (propertylist::is_assoc($v))
$this->textwritedict($text, $v, $indentlevel);
elseif (is_array($v))
$this->textwritearray($text, $v, $indentlevel);
elseif (is_a($v, 'plistdata'))
$text .= '<' . $v->hexencodeddata() . '>';
elseif (is_a($v, 'plistdate'))
$text .= '"' . $v->iso8601date() . '"';
else {
trigger_error("unsupported data type in plist ($v)", e_user_warning);
$this->textwritestring($text, $v);
}
}
private function textwritestring(&$text, &$str) {
$oldlocale = setlocale(lc_ctype, "0");
if (ctype_alnum($str)) $text .= $str;
else $text .= '"' . $this->textencodestring($str) . '"';
setlocale(lc_ctype, $oldlocale);
}
private function textencodestring(&$str) {
$newstr = '';
$i = 0;
$len = strlen($str);
while($i < $len) {
$ch = ord(substr($str, $i, 1));
if ($ch == 0x22 || $ch == 0x5c) {
// escape double quote, backslash
$newstr .= '\\' . chr($ch);
$i++;
} else if ($ch >= 0x07 && $ch <= 0x0d ){
// control characters with escape sequences
$newstr .= '\\' . substr('abtnvfr', $ch - 7, 1);
$i++;
} else if ($ch < 32) {
// other non-printable characters escaped as unicode
$newstr .= sprintf('\u%04x', $ch);
$i++;
} else if ($ch < 128) {
// ascii printable
$newstr .= chr($ch);
$i++;
} else if ($ch == 192 || $ch == 193) {
// invalid encoding of ascii characters
$i++;
} else if (($ch & 0xc0) == 0x80){
// part of a lost multibyte sequence, skip
$i++;
} else if (($ch & 0xe0) == 0xc0) {
// u+0080 - u+07ff (2 bytes)
$u = (($ch & 0x1f) << 6) | (ord(substr($str, $i+1, 1)) & 0x3f);
$newstr .= sprintf('\u%04x', $u);
$i += 2;
} else if (($ch & 0xf0) == 0xe0) {
// u+0800 - u+ffff (3 bytes)
$u = (($ch & 0x0f) << 12) | ((ord(substr($str, $i+1, 1)) & 0x3f) << 6) | (ord(substr($str, $i+2, 1)) & 0x3f);
$newstr .= sprintf('\u%04x', $u);
$i += 3;
} else if (($ch & 0xf8) == 0xf0) {
// u+10000 - u+3ffff (4 bytes)
$u = (($ch & 0x07) << 18) | ((ord(substr($str, $i+1, 1)) & 0x3f) << 12) | ((ord(substr($str, $i+2, 1)) & 0x3f) << 6) | (ord(substr($str, $i+3, 1)) & 0x3f);
$newstr .= sprintf('\u%04x', $u);
$i += 4;
} else {
// 5 and 6 byte sequences are not valid utf-8
$i++;
}
}
return $newstr;
}
private function textwritedict(&$text, &$dict, $indentlevel) {
if (count($dict) == 0) {
$text .= '{}';
return;
}
$text .= "{\n";
$indent = '';
$indentlevel++;
while(strlen($indent) < $indentlevel) $indent .= "\t";
foreach($dict as $k => &$v) {
$text .= $indent;
$this->textwritevalue($text, $k);
$text .= ' = ';
$this->textwritevalue($text, $v, $indentlevel);
$text .= ";\n";
}
$text .= substr($indent, 0, -1) . '}';
}
private function textwritearray(&$text, &$arr, $indentlevel) {
if (count($arr) == 0) {
$text .= '()';
return;
}
$text .= "(\n";
$indent = '';
$indentlevel++;
while(strlen($indent) < $indentlevel) $indent .= "\t";
foreach($arr as &$v) {
$text .= $indent;
$this->textwritevalue($text, $v, $indentlevel);
$text .= ",\n";
}
$text .= substr($indent, 0, -1) . ')';
}
}
class plistdata
{
private $data;
public function __construct($str) {
$this->data = $str;
}
public function base64encodeddata () {
return base64_encode($this->data);
}
public function hexencodeddata () {
$len = strlen($this->data);
$hexstr = '';
for($i = 0; $i < $len; $i += 4)
$hexstr .= bin2hex(substr($this->data, $i, 4)) . ' ';
return substr($hexstr, 0, -1);
}
}
class plistdate
{
private $dateval;
public function __construct($init = null) {
if (is_int($init))
$this->dateval = $init;
elseif (is_string($init))
$this->dateval = strtotime($init);
elseif ($init == null)
$this->dateval = time();
}
public function iso8601date() {
return gmdate('y-m-d\th:i:s\z', $this->dateval);
}
}
?>