(PHP)递归遍历数组中的子元素，可删除或修改任意层级的子元素

目前主流的删除数组子元素的方法，都是只能删除第一层级的子元素，通过下面的源码可以实现删除任意层级的数据子元素。

源码
查看源代码

$array = [
‘a’ => [
‘b’ => [
‘c’ => ‘d’,
‘e’ => ‘f’
]
],
‘g’ => [
‘h’ => ‘i’
]
];
$deleteKey = ‘a.b.c’;
$keyArray = explode(’.’, $deleteKey);

//change a.b.c value
$result{[}^{\prime }chang{e}^{\prime }]=recurArrayDiff($array, $keyArray, ‘change a.b.c value’);

//delete a.b.c
$result{[}^{\prime }delet{e}^{\prime }]=recurArrayDiff($array, $keyArray);echojso{n}_{e}ncode($result);

function recurArrayDiff($array, $keyArray, $replace = null)
{
$key0 = $keyArray[0];if(i{s}_{a}rray($array) && isset(KaTeX parse error: Expected '}', got 'EOF' at end of input: … unset(keyArray[0]);
$keyArray=arra{y}_{v}alues($keyArray);
if (!isset($array[$key0])) {
$array[$key0] = [];
}
$array[$key0] = recurArrayDiff($array[$key0], $keyArray, KaTeX parse error: Expected 'EOF', got '}' at position 15: replace); }̲ else { …replace)) {
unset($array[$key0]);
} else {
$array[$key0] = $replace;
}
}
return $array;
}
输出
{
“change”: {
“a”: {
“b”: {
“c”: “change a.b.c value”,
“e”: “f”
}
},
“g”: {
“h”: “i”
}
},
“delete”: {
“a”: {
“b”: {
“e”: “f”
}
},
“g”: {
“h”: “i”
}
}
}
升级版
封装为一个类，支持数组任意层级子元素的增删改查

源码
查看源代码

<?php namespace api\tool\lib; /** * 数组操作类 * @desc 支持任意层级子元素的增删改查 * @package library\logic */ class ArrayTool implements \ArrayAccess { public static function instance($array = [], $separator = '.') { return new self($array, $separator); } private $array; private $separator; public function __construct($array, $separator = '.') { $this->array = $array; $this->separator = $separator; } /** * 设置任意层级子元素 * @param string|array|int $key * @param mixed $value * @return $this */ public function set($key, $value = null) { if (is_array($key)) { foreach ($key as $k => $v) { $this->set($k, $v); } } else { if (false === strpos($key, $this->separator)) { $this->array[$key] = $value; } else { $keyArray = explode($this->separator, $key); $this->array = $this->recurArrayChange($this->array, $keyArray, $value); } } return $this; } /** * 获取任意层级子元素 * @param null|string|int $key * @param mixed $default * @return mixed */ public function get($key = null, $default = null) { if (is_null($key)) { return $this->array; } if (false === strpos($key, $this->separator)) { return isset($this->array[$key]) ? $this->array[$key] : $default; } $keyArray = explode($this->separator, $key); $tmp = $this->array; foreach ($keyArray as $k) { if (isset($tmp[$k])) { $tmp = $tmp[$k]; } else { $tmp = $default; break; } } return $tmp; } /** * 删除任意层级子元素 * @param string|array|int $key * @return $this */ public function delete($key) { if (is_array($key)) { foreach ($key as $k) { $this->set($k, null); } } else { $this->set($key, null); } return $this; } /** * 获取某一节点下的子元素key列表 * @param $key * @return array */ public function getChildKeyList($key) { $child = $this->get($key); $list = []; $n = 0; foreach ($child as $k => $v) { $list[$n++] = $k; } return $list; } /** * 递归遍历 * @param array $array * @param array $keyArray * @param mixed $value * @return array */ private function recurArrayChange($array, $keyArray, $value = null) { $key0 = $keyArray[0]; if (is_array($array) && isset($keyArray[1])) { unset($keyArray[0]); $keyArray = array_values($keyArray); if (!isset($array[$key0])) { $array[$key0] = []; } $array[$key0] = $this->recurArrayChange($array[$key0], $keyArray, $value); } else { if (is_null($value)) { unset($array[$key0]); } else { $array[$key0] = $value; } } return $array; } /** * isset($array[$key]) * @param mixed $offset * @return bool */ public function offsetExists($offset) { return !is_null($this->get($offset)); } /** * $array[$key] * @param mixed $offset * @return mixed */ public function offsetGet($offset) { return $this->get($offset); } /** * $array[$key] = $value * @param mixed $offset * @param mixed $value * @return $this */ public function offsetSet($offset, $value) { return $this->set($offset, $value); } /** * unset($array[$key]) * @param mixed $offset * @return $this */ public function offsetUnset($offset) { return $this->delete($offset); } } 使用示例 //instance $array = ArrayTool::instance([], $separator = '.'); //set $array->set('a1.b1', 'c1'); $array['a2.b2'] = 'c2'; //get echo $array->get('a1.b1'); echo $array['a2.b2']; //get all $array->get(); //get child key list $array->getChildKeyList('a1'); //delete $array->delete('a1.b1'); unset($array['a2.b2']);