PHPcdata processing (details)

Previously, simplexml of php was used to parse xml for Project catch-up. at that time, simplexml was not supported! [CDATA tag, all values in this tag cannot be obtained from a CDATA converter found online at the time. after modification, filter out the CDATA tag. As follows:
The code is as follows:
// States:
//
// 'Out'
// '<'
//' //' //' //' //' //' // 'In'
// ']'
// ']'
//
// (Yes, the states a represented by strings .)
//
$ State = 'out ';
$ A = str_split ($ xml );
$ New_xml = '';
Foreach ($ a AS $ k => $ v ){
// Deal with "state ".
Switch ($ state ){
Case 'out ':
If ('<' = $ v ){
$ State = $ v;
} Else {
$ New_xml. = $ v;
}
Break;
Case '<':
If ('! '= $ V ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('[' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('C' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('D' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('a' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('t' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('a' = $ v ){
$ State = $ state. $ v;
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case' If ('[' = $ v ){
$ Cdata = '';
$ State = 'in ';
} Else {
$ New_xml. = $ state. $ v;
$ State = 'out ';
}
Break;
Case 'in ':
If (']' = $ v ){
$ State = $ v;
} Else {
$ Cdata. = $ v;
}
Break;
Case ']':
If (']' = $ v ){
$ State = $ state. $ v;
} Else {
$ Cdata. = $ state. $ v;
$ State = 'in ';
}
Break;
Case ']':
If ('>' = $ v ){
$ New_xml. = htmlentities ($ cdata );
# $ New_xml. = $ cdata;
// $ New_xml. = str_replace ('>', '> ',
// Str_replace ('>', '<',
// Str_replace ('"','"',
// Str_replace ('&','&',
// $ Cdata ))));
$ State = 'out ';
} Else {
$ Cdata. = $ state. $ v;
$ State = 'in ';
}
Break;
} // Switch
}
//
// Return.
//
Return $ new_xml;

Recently, it was found that alert always came out, saying that simplexml parsing is incorrect.

It is found that the original xml data isdomain[test]]] >. 出现了连续的3个]， 造成上面的解析函数不能处理。 <br><br>而且这个问题很难修正， 你不知道下次会不会有4， 5个]出现。 <br><br>所以决定还是将这段解析 的代码换成DOM XML，本身 DOM的处理还是比较简单的， <br><br>包含DOMElement, DOMDocument, DOMNodeList, DOMNode几个 component. <br><br>对于 DOMNode有nodeValue, nodeType, nodeName的成员函数。 <br><br>首先先用loadXML将string转化为DOMDocument对像， 再用getElementsByTagName转化为DOMNodeList对像， 再使用->item(0)转化为DOMNOde， 然后就可以使用上面的三种方法了。 <br><br>对于 test</aa>这种xml标签， 要使用 attribute函数。