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    php xml转json格式怎么转换

    藏色散人藏色散人2021-05-19 18:40:35原创167

    php xml转json格式的方法:首先创建一个PHP示例文件;然后通过“function xmlToArray($xml, $options = array()){...}”方法将一个xml文件的数据转换为Json格式数据即可。

    本文操作环境:windows7系统、PHP7.1版,DELL G3电脑

    PHP XML 与 JSON 相互转换

    XML 转 JSON

    以下代码演示了如何将一个 xml 文件的数据转换为 Json 格式数据:

    function xmlToArray($xml, $options = array()) {
        $defaults = array(
            'namespaceSeparator' => ':',//you may want this to be something other than a colon
            'attributePrefix' => '@',   //to distinguish between attributes and nodes with the same name
            'alwaysArray' => array(),   //array of xml tag names which should always become arrays
            'autoArray' => true,        //only create arrays for tags which appear more than once
            'textContent' => '$',       //key used for the text content of elements
            'autoText' => true,         //skip textContent key if node has no attributes or child nodes
            'keySearch' => false,       //optional search and replace on tag and attribute names
            'keyReplace' => false       //replace values for above search values (as passed to str_replace())
        );
        $options = array_merge($defaults, $options);
        $namespaces = $xml->getDocNamespaces();
        $namespaces[''] = null; //add base (empty) namespace
     
        //get attributes from all namespaces
        $attributesArray = array();
        foreach ($namespaces as $prefix => $namespace) {
            foreach ($xml->attributes($namespace) as $attributeName => $attribute) {
                //replace characters in attribute name
                if ($options['keySearch']) $attributeName =
                        str_replace($options['keySearch'], $options['keyReplace'], $attributeName);
                $attributeKey = $options['attributePrefix']
                        . ($prefix ? $prefix . $options['namespaceSeparator'] : '')
                        . $attributeName;
                $attributesArray[$attributeKey] = (string)$attribute;
            }
        }
     
        //get child nodes from all namespaces
        $tagsArray = array();
        foreach ($namespaces as $prefix => $namespace) {
            foreach ($xml->children($namespace) as $childXml) {
                //recurse into child nodes
                $childArray = xmlToArray($childXml, $options);
                list($childTagName, $childProperties) = each($childArray);
     
                //replace characters in tag name
                if ($options['keySearch']) $childTagName =
                        str_replace($options['keySearch'], $options['keyReplace'], $childTagName);
                //add namespace prefix, if any
                if ($prefix) $childTagName = $prefix . $options['namespaceSeparator'] . $childTagName;
     
                if (!isset($tagsArray[$childTagName])) {
                    //only entry with this key
                    //test if tags of this type should always be arrays, no matter the element count
                    $tagsArray[$childTagName] =
                            in_array($childTagName, $options['alwaysArray']) || !$options['autoArray']
                            ? array($childProperties) : $childProperties;
                } elseif (
                    is_array($tagsArray[$childTagName]) && array_keys($tagsArray[$childTagName])
                    === range(0, count($tagsArray[$childTagName]) - 1)
                ) {
                    //key already exists and is integer indexed array
                    $tagsArray[$childTagName][] = $childProperties;
                } else {
                    //key exists so convert to integer indexed array with previous value in position 0
                    $tagsArray[$childTagName] = array($tagsArray[$childTagName], $childProperties);
                }
            }
        }
     
        //get text content of node
        $textContentArray = array();
        $plainText = trim((string)$xml);
        if ($plainText !== '') $textContentArray[$options['textContent']] = $plainText;
     
        //stick it all together
        $propertiesArray = !$options['autoText'] || $attributesArray || $tagsArray || ($plainText === '')
                ? array_merge($attributesArray, $tagsArray, $textContentArray) : $plainText;
     
        //return node as array
        return array(
            $xml->getName() => $propertiesArray
        );
    }

    使用实例

    $xmlNode = simplexml_load_file('example.xml');
    $arrayData = xmlToArray($xmlNode);
    echo json_encode($arrayData);
    JSON 转 XML
    以下代码将 JSON 数据格式作为 XML 输出:
    <?php
    $json = stream_get_contents(STDIN);
    $data = @json_decode($json, false);
    if (!is_array($data) && !is_object($data)) {
        echo 'ERROR: Invalid JSON given' . PHP_EOL;
        exit(1);
    }
    class Exporter
    {
        private $root = 'document';
        private $indentation = '    ';
        // TODO: private $this->addtypes = false; // type="string|int|float|array|null|bool"
        public function export($data)
        {
            $data = array($this->root => $data);
            echo '<?xml version="1.0" encoding="UTF-8">';
            $this->recurse($data, 0);
            echo PHP_EOL;
        }
        private function recurse($data, $level)
        {
            $indent = str_repeat($this->indentation, $level);
            foreach ($data as $key => $value) {
                echo PHP_EOL . $indent . '<' . $key;
                if ($value === null) {
                    echo ' />';
                } else {
                    echo '>';
                    if (is_array($value)) {
                        if ($value) {
                            $temporary = $this->getArrayName($key);
                            foreach ($value as $entry) {
                                $this->recurse(array($temporary => $entry), $level + 1);
                            }
                            echo PHP_EOL . $indent;
                        }
                    } else if (is_object($value)) {
                        if ($value) {
                            $this->recurse($value, $level + 1);
                            echo PHP_EOL . $indent;
                        }
                    } else {
                        if (is_bool($value)) {
                            $value = $value ? 'true' : 'false';
                        }
                        echo $this->escape($value);
                    }
                    echo '</' . $key . '>';
                }
            }
        }
        private function escape($value)
        {
            // TODO:
            return $value;
        }
        private function getArrayName($parentName)
        {
            // TODO: special namding for tag names within arrays
            return $parentName;
        }
    }
    $exporter = new Exporter();
    $exporter->export($data);

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