php PHP在多维数组中创建动态数组
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PHP create dynamic array in a multidimensional array
提问by Peter Otten
I want to dynamic create an array based on a number inside a multidimensional array
我想根据多维数组中的数字动态创建一个数组
here is the code
这是代码
$meta_box = array(
'id' => 'my-meta-box',
'title' => 'Custom Input Fields',
'page' => 'page',
'context' => 'normal',
'priority' => 'high',
'fields' => array (
array( //this array must be created dynamic
'name' => 'Textarea',
'desc' => 'Enter big text here',
'id' => 'textarea', //id is textarea + number
'type' => 'textarea',
'std' => 'Default value'
)
)
);
I want the last array to be created dynamic by a number so if the number is 2 there must be 2 arrays in there with the same name,desc,type,str but a diffrent ID.
我希望最后一个数组由一个数字动态创建，因此如果数字为 2，则其中必须有 2 个具有相同名称、desc、type、str 但 ID 不同的数组。
is this possible is somekind of way?
这可能是某种方式吗？
回答by hakre
Just add them dynamically by iterating over the number of ids:
只需通过迭代 id 的数量来动态添加它们：
$meta_box = array
(
'id' => 'my-meta-box',
'title' => 'Custom Input Fields',
'page' => 'page',
'context' => 'normal',
'priority' => 'high',
'fields' => array ()
);
$dynamicNumber = 2;
$idPrefix = 'textarea';
assert('$dynamicNumber > 0');
$dynamicIds = range(1, $dynamicNumber);
$fields = &$meta_box['fields'];
foreach($dynamicIds as $id)
{
$fields[] = array( //this array must be created dynamic
'name' => 'Textarea',
'desc' => 'Enter big text here',
'id' => sprintf('%s%d', $idPrefix, $id), //id is textarea + number
'type' => 'textarea',
'std' => 'Default value'
);
}
unset($fields);
回答by Bert
Here's a way to add each 'fields' sub array as a new array into the larger array
这是将每个“字段”子数组作为新数组添加到更大数组中的方法
$meta_box = array(
'id' => 'my-meta-box',
'title' => 'Custom Input Fields',
'page' => 'page',
'context' => 'normal',
'priority' => 'high');
$fields = array();
$numberOfArrays = 2;
for($i = 1; $i <= $numberOfArrays; $i++){
$fields[$i] = array (
array( //this array must be created dynamic
'name' => 'Textarea',
'desc' => 'Enter big text here',
'id' => 'textarea' . $i, //id is textarea + number
'type' => 'textarea',
'std' => 'Default value'
)
);
}
$meta_box['fields'] = $fields;
echo '<pre>';
print_r($meta_box);
echo '</pre>';
You'll get an output like this in your browser:
你会在浏览器中得到这样的输出：
Array
(
[id] => my-meta-box
[title] => Custom Input Fields
[page] => page
[context] => normal
[priority] => high
[fields] => Array
(
[1] => Array
(
[name] => Textarea
[desc] => Enter big text here
[id] => textarea1
[type] => textarea
[std] => Default value
)
[2] => Array
(
[name] => Textarea
[desc] => Enter big text here
[id] => textarea2
[type] => textarea
[std] => Default value
)
)
)
回答by Jan-Henk
First you create the array $meta_box as follows:
首先创建数组 $meta_box 如下：
$meta_box = array(
'id' => 'my-meta-box',
'title' => 'Custom Input Fields',
'page' => 'page',
'context' => 'normal',
'priority' => 'high',
'fields' => array ()
);
Then you can add the 'dynamic' arrays as follows:
然后您可以添加“动态”数组，如下所示：
$number = 2;
for ($i = 1; $i <= $number; $i++) {
$meta_box['fields'][] = array(
'name' => 'Textarea',
'desc' => 'Enter big text here',
'id' => 'textarea_' . $i, //id is textarea + number
'type' => 'textarea',
'std' => 'Default value'
);
}
This starts the numbering for the ids at 1 until $number.
这将从 1 开始编号，直到 $number。
