Example of an infinite loop array (recursion)

Example of an infinite loop array (recursion)

/** * Author: GuoWangYunYan * QQ: 279861795 * Date: 2011-6-23 * Link: www.jbuxe.com */ // Set the encoding Header ('content-type: text/html; charset = utf-8 '); // Abnormal, a five-dimensional array is used. $ A = array ( 'Aaaaa' => array ( 'Aaaaa' => array ( '123 ', '123 ', '123' ), 'Bbbbbbbb' => array ( '123 ', '123 ', '123' ), 'Cccccccc' => array ( '123 ', '123 ', '123' ), ), 'Bbbbbbbb' => array ( 'Aaaaa' => array ( '123 ', '123 ', '123' ), 'Bbbbbbbb' => array ( '123 ', '123 ', '123' ), 'Cccccccc' => array ( '123 ', '123 ', '123' ), ), 'Cccccccc' => array ( 'Aaaaa' => array ( '123 ', '123 ', '123' ), 'Bbbbbbbb' => array ( '123 ', '123 ', '123' ), 'Cccccccc' => array ( '000000' => array ('44', '55', '66 '), '000000' => array ('44', '55', '66 '), '20140901' => array ( '44' => array ('77 ', '88', '99 '), '55' => array ('77 ', '88', '99 '), '66 '=> array ('77', '88 ', '99 '), ), ), ), ); // Execute the function Fun ($ ); // The infinite classification recursion method starts. Function fun ($ _ info, $ deep = 0 ){ // Determine if it is an array If (is_array ($ _ info )){ // Foreach loop Foreach ($ _ info as $ key => $ val ){ // Before the first time-no more than four additional output key names in each loop Echo str_repeat ('-', $ deep). $ key .' '; // Recursive output key value. By the way, four values are added each time ---- Fun ($ val, $ deep + 4 ); } } Else { // Return directly if the key value is not an array Echo str_repeat ('-', $ deep). "$ val "; } } ?> Recursive interpretation: as an algorithm, recursion is widely used in programming languages. it refers to the re-import phenomenon generated when a function, process, or subprogram calls itself directly or indirectly during operation. Recursion is an important concept in computer science. the recursive method is an effective method in programming. writing a program using recursion can make the program concise and clear. If recursion is not used, the execution efficiency is relatively low.