The method of using recursive algorithm to iterate an infinite array in PHP

This article mainly introduces the use of recursive algorithm of PHP infinite Traversal array, combined with examples of PHP for one-dimensional arrays, two-dimensional arrays and multi-dimensional irregular array of general traversal techniques, the need for friends can refer to the next

Specific as follows:

<?php//Infinite Traversal Array $a1 = Array ("A", "B", "C"); One-dimensional array $a2 = Array (Array (3, 6), Array ("A", "B", "C")); Two-dimensional array $a3 = Array (Array (5, 4, 444), 2, 7, 6, 8, Array ("W", "D", Array (3, 2, "a"), "s"));  Multidimensional Irregular array function fun ($a) {  foreach ($a as $val) {    if (Is_array ($val)) {///If the key value is an array, the function recursively calls Fun      ($val);    } else {//If the key value is numeric, output      echo "$val <br/>";    }//end if      }//end foreach  }//end fun//fun ($a 1);//fun ($ A2); Fun ($a 3);? >

Output:

55544442768wd32as

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