我将有一组数组，其形式如下
<?php
$month = array(
[0]=>array("title"=>"Jan",
"key"=>1,
"value"=>1),
[1]=>array("title"=>"Feb",//index "value" not set
"key"=>1
),
[2]=>array("title"=>"March",
"key"=>1,
"value"=>1),
[3]=>array("title"=>"Apr", //index "value" not set
"key"=>1
),
[4]=>array("title"=>"May",
"key"=>1,
"value"=>1),
[5]=>array("title"=>"June",
"key"=>1,
"value"=>1)
) ?>
对于索引[1]和索引[3]，不设置"值"。我想把这两个数组放在数组的末尾。最后，结果如下。。
<?php
//Desired Result
$months = array(
[0]=>array("title"=>"Jan",
"key"=>1,
"value"=>1),
[1]=>array("title"=>"March",
"key"=>1,
"value"=>1),
[2]=>array("title"=>"May",
"key"=>1,
"value"=>1),
[3]=>array("title"=>"June",
"key"=>1,
"value"=>1),
[4]=>array("title"=>"Feb", //the without "value" will be changed to here
"key"=>1),
[5]=>array("title"=>"Apr", //the without "value" will be changed to here
"key"=>1)
) ?>
所以，我需要使用循环检查名称"value"是否存在于数组中，若不存在，则需要将其转移到数组的末尾。如何进行这个动作？
请帮忙。
循环遍历数组并检查每个子数组是否有一个value元素。如果没有，则将其推送到$monthsWithoutIndices。如果是，则将其推送到$monthsWithIndices。循环结束后，使用array_merge()将这两个数组连接在一起，以获得最终结果：
$monthsWithIndices = array();
$monthsWithoutIndices = array();
foreach ($month as $key => $arr)
{
if (!isset($arr['value']))
{ // If it doesn't have a 'value'
$monthsWithoutIndices[] = $arr;
}
else
{ // If it has a 'value'
$monthsWithIndices[] = $arr;
}
}
// Join the two arrays
$result = array_merge($monthsWithIndices, $monthsWithoutIndices);
演示