Detailed explanation of steps to obtain binary tree image with PHP

This time I will bring you a detailed explanation of the steps to obtain a binary tree image with PHP. What are theprecautionsfor PHP to obtain a binary tree image. The following is a practical case, let's take a look.

Question

Manipulate the given binary tree and transform it into a mirror image of the source binary tree.

Solution idea

There are two ways to flip the binary tree: recursiveand non-recursive. Non-recursive is to usequeue.

Implementation code

val = $val; } }*/ function Mirror(&$root) { if($root == NULL) return 0; $queue = array(); array_push($queue, $root); while(!empty($queue)){ $node = array_shift($queue); $tmp = $node->left; $node->left = $node->right; $node->right = $tmp; if($node->left != NULL) array_push($queue, $node->left); if($node->right != NULL) array_push($queue, $node->right); } }

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

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