PHP输出当前进程所有变量/常量/模块/函数/类的示例_PHP教程

';<br>$b = array(1,1,2,3,5,8);<br>$arr = get_defined_vars();<br>// 打印 $b<br>print_r($arr["b"]);<br>// 打印所有服务器变量<br>print_r($arr["_SERVER"]);<br>// 打印变量数组的所有可用键值<br>print_r(array_keys(get_defined_vars()));<br>?&gt;<br><strong>2. get_defined_functions</strong> (PHP 4 &gt;= 4.0.4, PHP 5) — 获取所有已经定义的函数<br>array get_defined_functions ( void ) //void 表示为空，不需要任何参数<br><?php <BR>echo '<pre class="brush:php;toolbar:false;">';<br>function foo()<br>{<br>    echo "This is my function foo";<br>}<br>$arr = get_defined_functions();<br>print_r($arr);<br>?&gt;<br>

';<br>print_r(get_loaded_extensions());<br>?&gt;<br>

';<br>print_r(get_extension_funcs("gd"));<br>print_r(get_extension_funcs("xml"));<br>?&gt;<br>

';<br>define("MY_CONSTANT", 1);<br>print_r(get_defined_constants(true));<br>?&gt;<br>

';<br>//define classone<br>class classone { }<br>//define classtwo<br>class classtwo { }<br>//This will show X classes (built-ins, extensions etc) with<br>//classone and classtwo as the last two elements<br>print_r(get_declared_classes());<br>//define classthree<br>class classthree { }<br>//...and four<br>class classfour { }<br>//Shows the same result as before with class three and four appended<br>print_r(get_declared_classes());<br>?&gt;<br>