Question

如何使用php删除和编辑XML文件中的特定节点？请帮助我任何人!!

Answer 1

看看这个SO question。此外，this tutorial描述了一些在php中使用XML文档的不同方法。

Answer 2

我使用DOM库来遍历和操作XML文档。

在删除或编辑节点之前，您需要将XML文档加载到DOMDocument对象中：

$domDocument = new DOMDocument();
$domDocument->load('youfile.xml');

有很多方法可以找到您所追求的节点。其中一个是使用XPath为节点执行查询：

$xmlPath = new DOMXPath($domDocument);
$xmlNodes = $xmlPath->query('//graphics');

$ xmlNodes是一个DOMElements的数组。它们有自己的功能来删除或编辑您所追求的特定节点。

例如，您可以获取所有这些内容并删除某些属性：

foreach($xmlNodes as $node)
{
    $node->removeAttribute('size');
}

完成后，您可以将更改保存到文件：

$domDocument->save('yourfile.xml');

Answer 3

您可以使用xml2array函数，然后像数组一样威胁它：

function xml2array($contents, $get_attributes=1){
if(!$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_CASE_FOLDING, 0 );
xml_parser_set_option( $parser, XML_OPTION_SKIP_WHITE, 1 );
xml_parse_into_struct( $parser, $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;
//Go through the tags.
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.
    $result = '';
    if($get_attributes){//The second argument of the function decides this.
        $result = array();
        if(isset($value)) $result['value'] = $value;
        //Set the attributes too.
        if(isset($attributes)){
            foreach($attributes AS $attr => $val){
                if($get_attributes == 1) $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
                /**  :TODO: should we change the key name to '_attr'? Someone may use the tagname 'attr'. Same goes for 'value' too */
            }
        }
    }else if(isset($value)){
        $result = $value;
    }
    //See tag status and do the needed.
    if($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;
            $current = &$current[$tag];
        }else{ //There was another element with the same tag name
            if(isset($current[$tag][0])){
                array_push($current[$tag], $result);
            }else{
                $current[$tag] = array($current[$tag],$result);
            }
            $last = count($current[$tag]) - 1;
            $current = &$current[$tag][$last];
        }
    }else if($type == "complete"){//Tags that ends in 1 line '<tag />'
        //See if the key is already taken.
        if(!isset($current[$tag])){//New Key
            $current[$tag] = $result;
        }else{//If taken, put all things inside a list(array)
            if((is_array($current[$tag]) and $get_attributes == 0)//If it is already an array...
                    or (isset($current[$tag][0]) and is_array($current[$tag][0]) and $get_attributes == 1)){
                array_push($current[$tag],$result); // ...push the new element into that array.
            }else{//If it is not an array...
                $current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
            }
        }
    }else if($type == 'close'){ //End of tag '</tag>'
        $current = &$parent[$level-1];
    }
}
return($xml_array);
}

Answer 4

SimpleXML是PHP 5的新功能。

<?php
    $xml = simplexml_load_file("test.xml");
?>

将XML加载到simpleXML对象后，您可以找到特定节点并“取消设置”它以删除它。

如何使用php删除和编辑XML文件中的特定节点？

4 个答案: