[英]How to loop 3 dimension array using foreach PHP
下面是 foreach 和 3 维数组,循环没有问题,但我无法确定要回显哪个数组,他们必须像 echo $subvalue 这样的整个数组,循环 3 维数组有更好的解决方案吗? 我实际上对这种循环感到很奇怪。 感谢广告
foreach ($stories as $key => $story){
//echo "<br />";
foreach($story as $subkey => $subvalue){
echo $subvalue."<br />";
foreach($subvalue as $key => $subsubvalue){
echo $subsubvalue."<br />";
}
}
}
Array
(
[270] => Array
(
[uid] => 36
[user_email] => aaa@hotmail.com
[sid] => 270
[story_name] => Story C
[photo_url] => Array
(
[0] => story_photos/2012/0322/361332381418153311.jpg
[1] => story_photos/2012/0322/361332393792911587.jpg
)
[photo_added_date] => Array
(
[0] => 1332381418
[1] => 1332393792
)
)
[269] => Array
(
[uid] => 36
[user_email] => aaa@hotmail.com
[sid] => 269
[story_name] => Story B
[photo_url] => Array
(
[0] => story_photos/2012/0322/361332381406580761.jpg
)
[photo_added_date] => Array
(
[0] => 1332381406
)
)
[268] => Array
(
[uid] => 36
[user_email] => aaa@hotmail.com
[sid] => 268
[story_name] => Story A
[photo_url] => Array
(
[0] => story_photos/2012/0322/361332381393552719.jpg
)
[photo_added_date] => Array
(
[0] => 1332381393
)
)
)
为什么不试试这个:
foreach ($stories as $key => $story){
if(is_array($story)){
foreach($story as $subkey => $subvalue){
if(is_array($subvalue)){
foreach($subvalue as $key => $subsubvalue){
echo $subsubvalue."<br />";
}
} else {
echo $subvalue."<br />";
}
}
} else {
echo $story."<br />";
}
}
另外,我不确定,因为您的问题不是很清楚或没有具体说明。
要么
function echoArray( $array )
{
foreach ($array as $key => $cell)
{
if ( true == is_array($cell) )
{
echoArray($cell);
}
else
{
echo "$cell<br />";
}
}
}
它适用于 N 维数组
改进版本以了解深度并使用不同的 css 类作为深度并使用设置应添加值的标签:
例如:对于深度 0,类将通过 arrayclass_0,对于深度 1 arrayclass_1,等等...
/**
$array : The array
$depth: The depth ( you should always set it to 0)
$cssclassprefix: The css class prefix you want to set
$tag: the default tag to use to render
$arraytagkey: An optionnal key in your array to extract the tag to use
*/
function echoArray( $array, $depth=0, $cssclassprefix='arrayclass_', $tag='div', $arraytagkey = '' )
{
if ( 0 != strcmp($arraytagkey) && isset($array[$arraytagkey]) )
{
$tag=$array[$arraytagkey];
}
foreach ($array as $key => $cell)
{
if ( true == is_array($cell) )
{
echoArray($cell, $depth+1, $cssclassprefix, $tag, $arraytagkey);
}
else
{
$matches = array();
if ( 0 != preg_match("/^(img|iframe|input)$/i",$tag) )
{
if ( 0 != strcasecmp('input',$tag) )
{
echo "<input class='$cssclassprefix$depth' value='$cell' />";
}
else
{
echo "<$tag class='$cssclassprefix$depth' src='$cell' />";
}
}
else if( 0 != preg_match("/^(br|hr)$/i",$tag) )
{
echo "$cell<$tag />";
}
else
{
echo "<$tag class='$cssclassprefix$depth'>$cell</$tag>";
}
}
}
}
这并不能真正回答您的问题,但请注意,您的第三个循环是:
foreach ($subvalue as $key => $subsubvalue){
但是您已经在第一个循环中使用了 $key:
foreach ($stories as $key => $story){
您应该将第三个更改为:
foreach ($subvalue as $subsubkey => $subsubvalue){
您只是想循环访问并访问 photo_urls 和其他数据吗? 如果是这种情况,那么这里是一个如何访问数据的简单示例:
foreach($stories as $key => $story)
{
// here you can echo the $store['user_email'] etc
echo 'Email: ' . $story['user_email'] . '<br />';
// loop over the photo urls
foreach($story['photo_url'] as $photo_url)
{
echo 'Photo URL: ' . $photo_url . '<br />';
}
// loop over the photo added dates
foreach($story['photo_added_date'] as $photo_added_date)
{
echo 'Photo Date: ' . $photo_added_date . '<br />';
}
}
如果您想递归搜索数组,那么其他答案就是您想要的。
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