将一个元素推送到php中多维数组中的每个数组?
问题描述:
这是我的数组
$myArr = array(array('one', 'two'), array('one', 'two'));
我想向 $myArr 内的每个数组添加一个元素.我不想遍历里面的每个数组并添加该元素.是否有使用 array_map 或 array_walk.. 最好用一行代码来实现这一目标的更快方法?
I would like add an element to every array inside the $myArr. I dont wanna loop over each array inside and add that element. Is there any quicker way to achieve this using array_map or array_walk.. preferably with one line of code?
结果数组应该像
$myArr = array(array('one', 'two','three'), array('one', 'two','three'));
非常感谢
明白了,感谢 @strager
$myvar = 'Three';
$myArr = array_map(function ($subarray) { global $myvar; $subarray[] = $myvar; return $subarray;}, $myArr);
答
With array_walk
:
array_walk($myArr, create_function('&$subarray', '$subarray[] = "three";'));
使用array_map
:
$myArr = array_map(create_function('$subarray', '$subarray[] = "three"; return $subarray;'), $myArr);
带有匿名函数的 array_map
(未经测试;我无法访问 PHP5.3):
With anonymous functions an array_map
(untested; I don't have access to PHP5.3):
$myArr = array_map(function ($subarray) {
$subarray[] = "three";
return $subarray;
}, $myArr);
当然,或者更好的解决方案(对于 PHP
Or of course, the better solution (for PHP < 5.3):
function pushToEndOfSubarrays($array, $item) {
$ret = array();
foreach ($array as $key => $subarray) {
$subarray[] = $item;
$ret[$key] = $subarray;
}
return $ret;
}
$myArr = pushToEndOfSubarrays($myArr, 'three');