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Apr 9, 2025 · Fundamentals
Pre-order Traversal in PHP: Recursive, Iterative, and Interactive Implementations
This article explains the concept of pre-order (root-left-right) tree traversal, demonstrates how to represent binary trees in PHP, provides recursive and stack‑based iterative implementations, and includes an interactive script that lets users build a tree and choose traversal methods, with full example code.
Binary TreeInteractivePHP
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