PHP函数库01：PHP XML转数组函数
<?
/*
*
* xml2array() will convert the given XML text to an array in the XML structure.
* Link: http://www.bin-co.com/php/scripts/xml2array/
* Arguments : $contents - The XML text
* $get_attributes - 1 or 0. If this is 1 the function will get the attributes as well as the tag values - this results in a different array structure in the return value.
* $priority - Can be 'tag' or 'attribute'. This will change the way the resulting array sturcture. For 'tag', the tags are given more importance.
* Return: The parsed XML in an array form. Use print_r() to see the resulting array structure.
* Examples: $array = xml2array(file_get_contents('feed.xml'));
* $array = xml2array(file_get_contents('feed.xml', 1, 'attribute'));
*/
function
xml2array(
$contents
,
$get_attributes
=
1
,
$priority
=
'
tag
'
) {
if
(
!
$contents
)
return
array
();
if
(
!
function_exists
(
'
xml_parser_create
'
)) {
//
print "'xml_parser_create()' function not found!";
return
array
();
}
//
Get the XML parser of PHP - PHP must have this module for the parser to work
$parser
=
xml_parser_create
(
''
);
xml_parser_set_option
(
$parser
,
XML_OPTION_TARGET_ENCODING
,
"
UTF-8
"
);
#
http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
xml_parser_set_option
(
$parser
,
XML_OPTION_CASE_FOLDING
,
0
);
xml_parser_set_option
(
$parser
,
XML_OPTION_SKIP_WHITE
,
1
);
xml_parse_into_struct
(
$parser
,
trim
(
$contents
)
,
$xml_values
);
xml_parser_free
(
$parser
);
if
(
!
$xml_values
)
return
;
//
Hmm
//Initializations
$xml_array
=
array
();
$parents
=
array
();
$opened_tags
=
array
();
$arr
=
array
();
$current
=
&
$xml_array
;
//
Refference
//Go through the tags.
$repeated_tag_index
=
array
();
//
Multiple tags with same name will be turned into an array
foreach
(
$xml_values
as
$data
) {
unset
(
$attributes
,
$value
);
//
Remove existing values, or there will be trouble
//This command will extract these variables into the foreach scope
// tag(string), type(string), level(int), attributes(array).
extract
(
$data
);
//
We could use the array by itself, but this cooler.
$result
=
array
();
$attributes_data
=
array
();
if
(
isset
(
$value
)) {
if
(
$priority
==
'
tag
'
)
$result
=
$value
;
else
$result
[
'
value
'
]
=
$value
;
//
Put the value in a assoc array if we are in the 'Attribute' mode
}
//
Set the attributes too.
if
(
isset
(
$attributes
) and
$get_attributes
) {
foreach
(
$attributes
as
$attr
=>
$val
) {
if
(
$priority
==
'
tag
'
)
$attributes_data
[
$attr
]
=
$val
;
else
$result
[
'
attr
'
][
$attr
]
=
$val
;
//
Set all the attributes in a array called 'attr'
}
}
//
See tag status and do the needed.
if
(
$type
==
"
open
"
) {
//
The starting of the tag '<tag>'
$parent
[
$level
-
1
]
=
&
$current
;
if
(
!
is_array
(
$current
) or (
!
in_array
(
$tag
,
array_keys
(
$current
)))) {
//
Insert New tag
$current
[
$tag
]
=
$result
;
if
(
$attributes_data
)
$current
[
$tag
.
'
_attr
'
]
=
$attributes_data
;
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
=
1
;
$current
=
&
$current
[
$tag
];
}
else
{
//
There was another element with the same tag name
if
(
isset
(
$current
[
$tag
][
0
])) {
//
If there is a 0th element it is already an array
$current
[
$tag
][
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]]
=
$result
;
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
++
;
}
else
{
//
This section will make the value an array if multiple tags with the same name appear together
$current
[
$tag
]
=
array
(
$current
[
$tag
]
,
$result
);
//
This will combine the existing item and the new item together to make an array
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
=
2
;
if
(
isset
(
$current
[
$tag
.
'
_attr
'
])) {
//
The attribute of the last(0th) tag must be moved as well
$current
[
$tag
][
'
0_attr
'
]
=
$current
[
$tag
.
'
_attr
'
];
unset
(
$current
[
$tag
.
'
_attr
'
]);
}
}
$last_item_index
=
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
-
1
;
$current
=
&
$current
[
$tag
][
$last_item_index
];
}
}
elseif
(
$type
==
"
complete
"
) {
//
Tags that ends in 1 line '<tag />'
//See if the key is already taken.
if
(
!
isset
(
$current
[
$tag
])) {
//
New Key
$current
[
$tag
]
=
$result
;
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
=
1
;
if
(
$priority
==
'
tag
'
and
$attributes_data
)
$current
[
$tag
.
'
_attr
'
]
=
$attributes_data
;
}
else
{
//
If taken, put all things inside a list(array)
if
(
isset
(
$current
[
$tag
][
0
]) and
is_array
(
$current
[
$tag
])) {
//
If it is already an array
// push the new element into that array.
$current
[
$tag
][
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]]
=
$result
;
if
(
$priority
==
'
tag
'
and
$get_attributes
and
$attributes_data
) {
$current
[
$tag
][
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
.
'
_attr
'
]
=
$attributes_data
;
}
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
++
;
}
else
{
//
If it is not an array
$current
[
$tag
]
=
array
(
$current
[
$tag
]
,
$result
);
//
Make it an array using using the existing value and the new value
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
=
1
;
if
(
$priority
==
'
tag
'
and
$get_attributes
) {
if
(
isset
(
$current
[
$tag
.
'
_attr
'
])) {
//
The attribute of the last(0th) tag must be moved as well
$current
[
$tag
][
'
0_attr
'
]
=
$current
[
$tag
.
'
_attr
'
];
unset
(
$current
[
$tag
.
'
_attr
'
]);
}
if
(
$attributes_data
) {
$current
[
$tag
][
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
.
'
_attr
'
]
=
$attributes_data
;
}
}
$repeated_tag_index
[
$tag
.
'
_
'
.
$level
]
++
;
//
0 and 1 index is already taken
}
}
}
elseif
(
$type
==
'
close
'
) {
//
End of tag '</tag>'
$current
=
&
$parent
[
$level
-
1
];
}
}
return
(
$xml_array
);
}
?>
函数描述及例子
$arr
=
xml2array(
file_get_contents
(
"
tools.xml
"
)
,
1
,
'
attribute
'
);