Question

我想找出包含所选数组的正确密钥。现在，代码回显了3的下一个数组键，而不是2.这看起来非常基本。我可以通过简单地减去1来解决这个问题，但这似乎有问题，因为最后一个艺术家阵列回应了0的位置。任何人都可以帮忙吗？（我需要找到这个键，以便我可以正确设置下一个和以前的值。）

sample_entries.xml

<?xml version="1.0"?>
<entries>
    <entry>
        <rank>1</rank>
        <id>koons_jeff</id>
        <firstname>Jeff</firstname>
        <lastname>Koons</lastname>
        <bcountry>US</bcountry>
        <byear>1955</byear>
    </entry>
    <entry>
        <rank>2</rank>
        <id>richter_gerhard</id>
        <firstname>Gerhard</firstname>
        <lastname>Richter</lastname>
        <bcountry>DE</bcountry>
        <byear>1932</byear>
    </entry>
    <entry>
        <rank>5</rank>
        <id>doig_peter</id>
        <firstname>Peter</firstname>
        <lastname>Doig</lastname>
        <bcountry>UK</bcountry>
        <byear>1959</byear>
    </entry>
    <entry>
        <rank>7</rank>
        <id>marden_brice</id>
        <firstname>Brice</firstname>
        <lastname>Marden</lastname>
        <bcountry>US</bcountry>
        <byear>1938</byear>
    </entry>
</entries>

的index.php

<?php
$xml = simplexml_load_file('sample_entries.xml');
$path = $xml->xpath('entry');
//strip simple xml tags.
$array = json_decode( json_encode($path) , 1);
print_r($array);
// cannot change the above XML structure.

echo '<br><br>';


// set page's unique identifier.
$artist = 'doig_peter'; 


foreach($array as $element => $inner_array) { 

    if($artist == $inner_array[id]) {
        $current_artist = $inner_array;
        extract($current_artist);
        echo '<b>Current Artist: </b>'.$firstname.' '.$lastname.' - '.$bcountry.'-'.$byear.'<br><br>';
        echo key($array); 
    }
}
?>

这是当前输出前面的代码。我希望最后一个数字“[3]”报告包含id数据的正确密钥，即“[2]”：

数组（[0] =＆gt;数组（[rank] =＆gt; 1 [id] =＆gt; koons_jeff [firstname] =＆gt;   杰夫[姓氏] =＆gt;昆斯[bcountry] =＆gt;美国[byear] =＆gt; 1955）[1] =＆gt;   数组（[rank] =＆gt; 2 [id] =＆gt; richter_gerhard [firstname] =＆gt; Gerhard   [lastname] =＆gt;里希特[bcountry] =＆gt; DE [byear] =＆gt; 1932）[2] =＆gt;排列   （[rank] =＆gt; 5 [id] =＆gt; doig_peter [firstname] =＆gt; Peter [lastname] =＆gt;   Doig [bcountry] =＆gt;英国[byear] =＆gt; 1959）[3] =＆gt;数组（[rank] =＆gt; 7   [id] =＆gt; marden_brice [firstname] =＆gt;布里斯[lastname] =＆gt;马登   [bcountry] =＆gt;美国[byear] =＆gt; 1938））

现任艺术家：Peter Doig - UK-1959

3

Answer 1

而不是

echo key($array);

你想要

echo $element;

因为$ element是在foreach循环中分配的变量，用于保存当前密钥。

在多维php数组中查找父键

1 个答案: