完成变量混淆

2026-07-08 02:52:49 +08:00 · 2022-11-19 17:43:43 +08:00
parent 4e17c7125f
commit d135407689
3 changed files with 63 additions and 1 deletions
--- a/app/common/tools/phpparser/NodeFakeVarVisitorTools.php
+++ b/app/common/tools/phpparser/NodeFakeVarVisitorTools.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace app\common\tools\phpparser;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\Variable;
+use PhpParser\Node\Stmt;
+use PhpParser\Node\Stmt\Global_;
+use PhpParser\NodeTraverser;
+use PhpParser\NodeVisitorAbstract;
+
+class NodeFakeVarVisitorTools extends NodeVisitorAbstract
+{
+
+    protected static $varNameMap = [];
+
+    protected $skipVariableName = [
+        'GLOBALS',
+        '_SERVER',
+        '_REQUEST',
+        '_POST',
+        '_GET',
+        '_FILES',
+        '_ENV',
+        '_COOKIE',
+        '_SESSION',
+        'this'
+    ];
+
+    public function leaveNode(Node $node)
+    {
+
+        if ($node instanceof Variable) {
+            if (is_string($node->name)) {
+
+                if (in_array($node->name, $this->skipVariableName)) {
+                    return;
+                }
+
+                if (!isset($this::$varNameMap[$node->name])) {
+                    $var_name = 'ul' . uniqid();
+                    $this::$varNameMap[$node->name] = $var_name;
+                }
+
+                $node->name = $this::$varNameMap[$node->name];
+                return $node;
+            }
+        }
+    }
+}