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HomeBackend DevelopmentPHP Tutorial PHP输出现阶段进程所有变量 / 常量 / 模块 / 函数 / 类

PHP输出当前进程所有变量 / 常量 / 模块 / 函数 / 类

1.?get_defined_vars??(PHP 4 >= 4.0.4, PHP 5)?― 获取由所有已定义变量所组成的数组

?

array?get_defined_vars?(?void?)

?

此函数返回一个包含所有已定义变量列表的多维数组,这些变量包括环境变量、服务器变量和用户定义的变量。

?

<?php echo '<pre class="brush:php;toolbar:false">';

$b = array(1,1,2,3,5,8);

$arr = get_defined_vars();

// 打印 $b
print_r($arr["b"]);

// 打印所有服务器变量
print_r($arr["_SERVER"]);

// 打印变量数组的所有可用键值
print_r(array_keys(get_defined_vars()));
?>
?

2.?get_defined_functions?(PHP 4 >= 4.0.4, PHP 5)?―?获取所有已经定义的函数

?

array get_defined_functions ( void ) //void 表示为空,不需要任何参数

?

<?php echo '<pre class="brush:php;toolbar:false">';

function foo()
{
    echo "This is my function foo";
}
$arr = get_defined_functions();
print_r($arr);

?>

?

3.?get_loaded_extensions?(PHP 4, PHP 5)?―?获取所有可用的模块

?

<?php echo '<pre class="brush:php;toolbar:false">';

print_r(get_loaded_extensions());
?>
?

4.?get_extension_funcs?(PHP 4, PHP 5)?―?获取指定模块的可用函数

?

array?get_extension_funcs?(?string?$module_name?)?该函数返回指定模块所有可用的函数。传入的参数(模块名称)必须是小写

?

<?php echo '<pre class="brush:php;toolbar:false">';

print_r(get_extension_funcs("gd"));
print_r(get_extension_funcs("xml"));
?>
?

5.?get_defined_constants?(PHP 4 >= 4.1.0, PHP 5)?―? 获取关联数组的名字所有的常量和他们的价值

?

array?get_defined_constants?([?bool?$categorize?= false?] )

?

<?php echo '<pre class="brush:php;toolbar:false">';

define("MY_CONSTANT", 1);
print_r(get_defined_constants(true));
?>
?

6.?get_declared_classes?(PHP 4, PHP 5)?―??获取由已定义类的名字所组成的数组

?

array?get_declared_classes?(?void?)

?

<?php echo '<pre class="brush:php;toolbar:false">';

//define classone
class classone { }

//define classtwo
class classtwo { }

//This will show X classes (built-ins, extensions etc) with
//classone and classtwo as the last two elements

print_r(get_declared_classes());

//define classthree
class classthree { }

//...and four
class classfour { }

//Shows the same result as before with class three and four appended
print_r(get_declared_classes());
?>
?

?

?

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