这篇文章主要介绍php中xml转json格式如何转换，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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);php是什么语言
php，一个嵌套的缩写名称，是英文超级文本预处理语言（PHP:Hypertext Preprocessor）的缩写。PHP 是一种 HTML 内嵌式的语言，PHP与微软的ASP颇有几分相似，都是一种在服务器端执行的嵌入HTML文档的脚本语言，语言的风格有类似于C语言，现在被很多的网站编程人员广泛的运用。
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