php 不带循环和带循环的数组的回显键和值
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echo key and value of an array without and with loop
提问by esafwan
This is an array i have
这是我有的数组
<?php
$page['Home']='index.html';
$page['Service']='services.html';
?>
How do i get to echo something like this for individual one like
我如何才能为个人像这样回声
Home is at index.html
and again how can i do this through a loop and echo all?
再次我如何通过循环来做到这一点并回显所有？
回答by Mchl
foreach($page as $key => $value) {
echo "$key is at $value";
}
For 'without loop' version I'll just ask "why?"
对于“无循环”版本，我只会问“为什么？”
回答by Alix Axel
Without a loop, just for the kicks of it...
没有循环，只是为了它的开始......
You can either convert the array to a non-associative one, by doing:
您可以通过执行以下操作将数组转换为非关联数组：
$page = array_values($page);
And then acessing each element by it's zero-based index:
然后通过从零开始的索引访问每个元素：
echo $page[0]; // 'index.html'
echo $page[1]; // 'services.html'
Or you can use a slightly more complicated version:
或者您可以使用稍微复杂一点的版本：
$value = array_slice($page, 0, 1);
echo key($value); // Home
echo current($value); // index.html
$value = array_slice($page, 1, 1);
echo key($value); // Service
echo current($value); // services.html
回答by kennytm
If you must not use a loop (why?), you could use array_walk,
如果你不能使用循环（为什么？），你可以使用array_walk，
function printer($v, $k) {
echo "$k is at $v\n";
}
array_walk($page, "printer");
回答by Your Common Sense
for the first question
对于第一个问题
$key = 'Home';
echo $key." is at ".$page[$key];
回答by avi
Echo key and value of an array without and with loop
不带循环和带循环的数组的回显键和值
$array = array(
'kk6NFKK'=>'name',
'nnbDDD'=>'claGg',
'nnbDDD'=>'kaoOPOP',
'nnbDDD'=>'JWIDE4',
'nnbDDD'=>'lopO'
);
print_r(each($array));
Output
输出
Array
(
[1] => name
[value] => name
[0] => kk6NFKK
[key] => kk6NFKK
)
回答by Mark Baker
function displayArrayValue($array,$key) {
if (array_key_exists($key,$array)) echo "$key is at ".$array[$key];
}
displayArrayValue($page, "Service");
回答by cloud
How to echo key and value of an array without and with loop
如何在没有循环和有循环的情况下回显数组的键和值
$keys = array_keys($page);
implode(',',$keys);
echo $keys[0].' is at '.$page['Home'];
回答by Karol Samborski
My version without a loop would be like this:
我没有循环的版本是这样的：
echo implode(
"\n",
array_map(
function ($k, $v) {
return "$k is at $v";
},
array_keys($page),
array_values($page)
)
);
回答by Omair
array_walk($v, function(&$value, $key) {
echo $key . '--'. $value;
});
Learn more about array_walk
了解有关array_walk 的更多信息
回答by Shivanand Sharma
A recursive function for a change;) I use it to output the media information for videos etc elements of which can use nested array / attributes.
用于更改的递归函数；) 我使用它来输出视频等元素的媒体信息，这些元素可以使用嵌套数组/属性。
function custom_print_array($arr = array()) {
$output = '';
foreach($arr as $key => $val) {
if(is_array($val)){
$output .= '<li><strong>' . ucwords(str_replace('_',' ', $key)) . ':</strong><ul class="children">' . custom_print_array($val) . '</ul>' . '</li>';
}
else {
$output .= '<li><strong>' . ucwords(str_replace('_',' ', $key)) . ':</strong> ' . $val . '</li>';
}
}
return $output;
}
}
