PHP multi-dimensional array element operation method, php multi-dimensional array element

PHP multi-dimensional array element operation method, php multi-dimensional array element

In my framework, a multi-dimensional array element operation class is mainly used to read the configuration data in the array. You can use the string Node Method:. b. c To obtain and set elements and overwrite multi-dimensional arrays. For more information, see!

<? Php/*** Created by PhpStorm. * User: ZHOUZ * Date: 14-5-25 * Time: pm */namespace Snail IL \ Component; /*** multi-dimensional array Node read/write * Class Node * @ package Snail IL \ Component */class Node extends AComponent {/*** multi-dimensional array Node separator * @ var string */const SP = '. ';/*** generate a string Node for non-string data * <code> * Node: create (array ('A',' B ', 1, true )) => 'a. B .1.1 '* Node: create ('A',' B ', null, false) => 'a. B '* </code> * @ param mixed $ no Des supports arrays and any number of parameters * @ return string */public static function create ($ nodes ){! Is_array ($ nodes) & $ nodes = func_get_args (); return join (static: SP, array_filter (array_map ('strval ', $ nodes )));} /*** get the multi-dimensional array node and convert it to the array key name * @ param string $ node * @ return array */public static function explode ($ node) {return explode (static :: SP, $ node);}/*** set the multi-dimensional array node value * Note: * because the PHP array value key name length only supports the maximum length of int, * To avoid confusion such as coverage, when converting all nodes to a key name, * is forcibly converted to a string type * @ param array & $ arr references the memory address of the operated array * @ param string $ node path, for example,. b. c => $ arr ['a'] ['B'] ['C']; * @ param mixed $ value * @ return void */public static function set (array & $ arr, $ node, $ value = null) {$ arr = $ arr2 = (array) $ arr; $ keys = static: explode ($ node); foreach ($ keys as $ key) {$ key = strval ($ key ); if (isset ($ arr [$ key]) {$ arr = & $ arr [$ key];} else {$ arr [$ key] = array (); $ arr = & $ arr [$ key] ;}$ arr = $ value ;} /*** get the specified node value of the multi-dimensional array * @ param array & $ arr reference the memory address of the operated array * @ param string $ node path, for example,. b. c => $ arr ['a'] ['B'] ['C']; * @ param null | mixed $ default returns the default value if the node does not exist * @ return mixed */public static function get (array & $ arr, $ node, $ default = null) {if (empty ($ arr) return $ default; $ keys = static: explode ($ node); foreach ($ keys as $ key) {$ key = strval ($ key); if (isset ($ arr [$ key]) {$ arr = & $ arr [$ key];} else {return $ default;} return $ arr ;} /*** overwrite or add the second multi-dimensional array to the first multi-dimensional array for merging * @ param array & $ arraySrc reference the updated array * @ param array & $ arrayReplace reference required the merged data * @ return void address operation does not return a value */public static function merge (array & $ arraySrc, array & $ arrayReplace) {if (empty ($ arrayReplace) return; foreach ($ arrayReplace as $ k =>&$ v) {if (is_array ($ v) & isset ($ arraySrc [$ k]) {static: merge ($ arraySrc [$ k], $ v );} else {$ arraySrc [$ k] = $ v ;}}/ *** determines whether a specified node exists in a multi-dimensional array, * The result is the same as the isset keyword. (If the key exists but the value is NULL, false is returned) * @ param array & $ arr reference the original array * @ param string $ node * @ return bool */public static function has (array & $ arr, $ node) {if (empty ($ arr) return false; $ keys = static: explode ($ node); foreach ($ keys as $ key) {$ key = strval ($ key); if (isset ($ arr [$ key]) {$ arr = & $ arr [$ key];} else {return false ;}} return true ;} /*** determine whether a specified key exists in the multi-dimensional array * @ param array & $ arr references the original array * @ param string $ node * @ return bool */public static function hasKey (array & $ arr, $ node) {if (empty ($ arr) return false; $ keys = static: explode ($ node); foreach ($ keys as $ key) {$ key = strval ($ key); if (array_key_exists ($ key, $ arr) {$ arr = & $ arr [$ key];} else {return false ;}} return true ;} /*** deregister the specified node element in the array * @ param array $ arr * @ param string $ node * @ return void */public static function clear (array & $ arr, $ node) {if (empty ($ arr) return; $ keys = static: explode ($ node); foreach ($ keys as $ key) {$ key = strval ($ key); if (isset ($ arr [$ key]) {$ arr = & $ arr [$ key];} else {return; // The specified node does not exist and is considered as successful.} $ arr = null; unset ($ arr );}}

The following is an example:

<? Phpecho '<pre> '; // test array 1 $ arr1 = ['A' => ['B' => ['c' => ['D' => ['E' => ['E' => [' f' => 'HTTP: // blog.csdn.net/zhouzme'{%}%%%%%%%// test array 2 $ arr2 = ['A' => ['B' => ['c' => ['H' => ['I' => ['J' => 'HTTP: // www.hihtml5.com/'dimensional elements have been read into the existing multi-dimensional element: '; echo Node: get ($ arr1, 'a. b. c. d. e. f', 'default'); // http://blog.csdn.net/zhouzmeecho '
The output result is as follows:


The above is all the PHP multi-dimensional array element operation methods provided by xiaobian. I hope you can support more help ~