feat(ext): update extension code and add ctype example

- Replace direct function calls with call() wrapper in ext.cc
- Remove unused php_func.h include
- Add new ctype/main.php example with isAsciiWhitespace function
- Implement proper parameter validation for ASCII range checking
- Add main function to demonstrate ctype space detection usage

examples/ctype/main.php

@@ -0,0 +1,23 @@
+<?php
+function isAsciiWhitespace(int $code) {
+    // 确保参数在有效范围内
+    if (!is_int($code) || $code < 0 || $code > 127) {
+        throw new InvalidArgumentException('参数必须是0-127之间的整数');
+    }
+
+    // 使用chr()将ASCII码转换为字符，然后用ctype_space检测
+    $char = chr($code);
+    return ctype_space($char);
+}
+
+function main()
+{
+    $list = [9, 10, 12, 13, 32];
+    foreach ($list as $code) {
+        if (isAsciiWhitespace($code)) {
+            echo "The ASCII code $code is a whitespace character.\n";
+        } else {
+            echo "The ASCII code $code is not a whitespace character.\n";
+        }
+    }
+}

examples/project/ext.cc

@@ -1,13 +1,12 @@
 #include <phpx.h>
 #include <iostream>
-#include "phpx_func.h"
 
 using namespace php;
 
 Int php_fn_test(Int a, Int b) {
     auto c = a + b;
-    var_dump(c);
+    call("var_dump", {c});
-    var_dump(php_uname());
+    call("var_dump", {call("php_uname")});
     return c;
 }