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Recursive implementation of converting php array to xml, php array xml recursive_PHP tutorial

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2016-07-13 09:53:18981browse

Recursive implementation of php array to xml, php array xml recursion

The need to convert PHP winning array to xml is common, and there are many implementation methods. Baidu searched There are various implementation methods, but basically they are borrowing some components and so on. I wrote a string grouping method myself, which supports multi-dimensional arrays. For reference only, please feel free to let us know if there are any deficiencies! 

<span>/*</span><span>*
*   将数组转换为xml
*    @param array $data    要转换的数组
*   @param bool $root     是否要根节点
*   @return string         xml字符串
*    @author Dragondean
*    @url    http://www.cnblogs.com/dragondean
</span><span>*/</span>
<span>function</span> arr2xml(<span>$data</span>, <span>$root</span> = <span>true</span><span>){
    </span><span>$str</span>=""<span>;
    </span><span>if</span>(<span>$root</span>)<span>$str</span> .= "<xml>"<span>;
    </span><span>foreach</span>(<span>$data</span> <span>as</span> <span>$key</span> => <span>$val</span><span>){
        </span><span>if</span>(<span>is_array</span>(<span>$val</span><span>)){
            </span><span>$child</span> = arr2xml(<span>$val</span>, <span>false</span><span>);
            </span><span>$str</span> .= "<<span>$key</span>><span>$child</span></<span>$key</span>>"<span>;
        }</span><span>else</span><span>{
            </span><span>$str</span>.= "<<span>$key</span>><![CDATA[<span>$val</span>]]></<span>$key</span>>"<span>;
        }
    }
    </span><span>if</span>(<span>$root</span>)<span>$str</span> .= "</xml>"<span>;
    </span><span>return</span> <span>$str</span><span>;
}</span>

The above is the implementation method. The first parameter is the array you want to convert. The second optional parameter sets whether to add the b2a0af5a8fd26276da50279a1c63a57a root node. It is required by default.

Test code: 

<span>$arr</span>=<span>array</span>('a'=>'aaa','b'=><span>array</span>('c'=>'1234' , 'd' => "asdfasdf"<span>));
</span><span>echo</span> arr2xml(<span>$arr</span>);

The result after executing the code is: 

<span><</span><span>xml</span><span>><</span><span>a</span><span>></span><span><!</span><span>[CDATA[aaa]]</span><span>></span><span></</span><span>a</span><span>><</span><span>b</span><span>><</span><span>c</span><span>></span><span><!</span><span>[CDATA[1234]]</span><span>></span><span></</span><span>c</span><span>><</span><span>d</span><span>></span><span><!</span><span>[CDATA[asdfasdf]]</span><span>></span><span></</span><span>d</span><span>></</span><span>b</span><span>></</span><span>xml</span><span>></span>

---------------------- ----------

Update:

During use, it was discovered that there would be problems with array conversion in the following format: 

<span>array</span><span>(
    </span>'item' => <span>array</span><span>(
        </span><span>array</span><span>(
            </span>'title' => 'qwe',
            'description' => 'rtrt',
            'picurl' => 'sdfsd',
            'url' => 'ghjghj'<span>
        )</span>,
        <span>array</span><span>(
            </span>'title' => 'jyutyu',
            'description' => 'werwe',
            'picurl' => 'xcvxv',
            'url' => 'ghjgh'<span>
        )
    )
);</span>

The converted result is: 

<span><</span><span>xml</span><span>></span>
    <span><</span><span>item</span><span>></span>
        <span><</span><span>0</span><span>></span>
            <span><</span><span>title</span><span>></span>
                <span><![CDATA[</span><span>qwe</span><span>]]></span>
            <span></</span><span>title</span><span>></span>
            <span><</span><span>description</span><span>></span>
                <span><![CDATA[</span><span>rtrt</span><span>]]></span>
            <span></</span><span>description</span><span>></span>
            <span><</span><span>picurl</span><span>></span>
                <span><![CDATA[</span><span>sdfsd</span><span>]]></span>
            <span></</span><span>picurl</span><span>></span>
            <span><</span><span>url</span><span>></span>
                <span><![CDATA[</span><span>ghjghj</span><span>]]></span>
            <span></</span><span>url</span><span>></span>
        <span></</span><span>0</span><span>></span>
        <span><</span><span>1</span><span>></span>
            <span><</span><span>title</span><span>></span>
                <span><![CDATA[</span><span>jyutyu</span><span>]]></span>
            <span></</span><span>title</span><span>></span>
            <span><</span><span>description</span><span>></span>
                <span><![CDATA[</span><span>werwe</span><span>]]></span>
            <span></</span><span>description</span><span>></span>
            <span><</span><span>picurl</span><span>></span>
                <span><![CDATA[</span><span>xcvxv</span><span>]]></span>
            <span></</span><span>picurl</span><span>></span>
            <span><</span><span>url</span><span>></span>
                <span><![CDATA[</span><span>ghjgh</span><span>]]></span>
            <span></</span><span>url</span><span>></span>
        <span></</span><span>1</span><span>></span>
    <span></</span><span>item</span><span>></span>
<span></</span><span>xml</span><span>></span>

Normally, we don’t want the whole layer of nodes in the xml converted above: cd3dfde4a81e47b0e19b5c7a4437feeaf35d6e602fd7d0f0edfa6f7d103c1b57. However, in php, the subscript cannot have the same name and cannot have multiple items. What to do?

I thought of a way to subscript items, such as item[0], item[1], and remove the subscripts in the form of [] during the conversion process to achieve multiple item nodes side by side.

The modified function is as follows:

<span>function</span> arr2xml(<span>$data</span>, <span>$root</span> = <span>true</span><span>){
    </span><span>$str</span>=""<span>;
    </span><span>if</span>(<span>$root</span>)<span>$str</span> .= "<xml>"<span>;
    </span><span>foreach</span>(<span>$data</span> <span>as</span> <span>$key</span> => <span>$val</span><span>){
        </span><span>//</span><span>去掉key中的下标[]</span>
        <span>$key</span> = <span>preg_replace</span>('/\[\d*\]/', '', <span>$key</span><span>);
        </span><span>if</span>(<span>is_array</span>(<span>$val</span><span>)){
            </span><span>$child</span> = arr2xml(<span>$val</span>, <span>false</span><span>);
            </span><span>$str</span> .= "<<span>$key</span>><span>$child</span></<span>$key</span>>"<span>;
        }</span><span>else</span><span>{
            </span><span>$str</span>.= "<<span>$key</span>><![CDATA[<span>$val</span>]]></<span>$key</span>>"<span>;
        }
    }
    </span><span>if</span>(<span>$root</span>)<span>$str</span> .= "</xml>"<span>;
    </span><span>return</span> <span>$str</span><span>;
}</span>

Then the array that needs to be converted above also needs to be changed accordingly: 

<span>$arr1</span> =<span>array</span><span>(
    </span>'item[0]' => <span>array</span><span>(
            </span>'title' => 'qwe',
            'description' => 'rtrt',
            'picurl' => 'sdfsd',
            'url' => 'ghjghj'<span>
        )</span>,
    'item[1]' => <span>array</span><span>(
            </span>'title' => 'jyutyu',
            'description' => 'werwe',
            'picurl' => 'xcvxv',
            'url' => 'ghjgh'<span>
        )
);</span>

The converted xml is as follows: 

<span><</span><span>xml</span><span>></span>
    <span><</span><span>item</span><span>></span>
        <span><</span><span>title</span><span>></span>
            <span><![CDATA[</span><span>qwe</span><span>]]></span>
        <span></</span><span>title</span><span>></span>
        <span><</span><span>description</span><span>></span>
            <span><![CDATA[</span><span>rtrt</span><span>]]></span>
        <span></</span><span>description</span><span>></span>
        <span><</span><span>picurl</span><span>></span>
            <span><![CDATA[</span><span>sdfsd</span><span>]]></span>
        <span></</span><span>picurl</span><span>></span>
        <span><</span><span>url</span><span>></span>
            <span><![CDATA[</span><span>ghjghj</span><span>]]></span>
        <span></</span><span>url</span><span>></span>
    <span></</span><span>item</span><span>></span>
    <span><</span><span>item</span><span>></span>
        <span><</span><span>title</span><span>></span>
            <span><![CDATA[</span><span>jyutyu</span><span>]]></span>
        <span></</span><span>title</span><span>></span>
        <span><</span><span>description</span><span>></span>
            <span><![CDATA[</span><span>werwe</span><span>]]></span>
        <span></</span><span>description</span><span>></span>
        <span><</span><span>picurl</span><span>></span>
            <span><![CDATA[</span><span>xcvxv</span><span>]]></span>
        <span></</span><span>picurl</span><span>></span>
        <span><</span><span>url</span><span>></span>
            <span><![CDATA[</span><span>ghjgh</span><span>]]></span>
        <span></</span><span>url</span><span>></span>
    <span></</span><span>item</span><span>></span>
<span></</span><span>xml</span><span>></span>

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