ReflectionFunction::__construct

(PHP 5, PHP 7, PHP 8)

ReflectionFunction::__constructConstructs a ReflectionFunction object

说明

public ReflectionFunction::__construct(Closure|string $function)

Constructs a ReflectionFunction object.

参数

function

The name of the function to reflect or a closure.

错误/异常

A ReflectionException if the function parameter does not contain a valid function.

范例

示例 #1 ReflectionFunction::__construct() example

<?php
/**
 * A simple counter
 *
 * @return    int
 */
function counter1()
{
    static 
$c 0;
    return ++
$c;
}

/**
 * Another simple counter
 *
 * @return    int
 */
$counter2 = function()
{
    static 
$d 0;
    return ++
$d;

};

function 
dumpReflectionFunction($func)
{
    
// Print out basic information
    
printf(
        
"\n\n===> The %s function '%s'\n".
        
"     declared in %s\n".
        
"     lines %d to %d\n",
        
$func->isInternal() ? 'internal' 'user-defined',
        
$func->getName(),
        
$func->getFileName(),
        
$func->getStartLine(),
        
$func->getEndline()
    );

    
// Print documentation comment
    
printf("---> Documentation:\n %s\n"var_export($func->getDocComment(), 1));

    
// Print static variables if existant
    
if ($statics $func->getStaticVariables())
    {
        
printf("---> Static variables: %s\n"var_export($statics1));
    }
}

// Create an instance of the ReflectionFunction class
dumpReflectionFunction(new ReflectionFunction('counter1'));
dumpReflectionFunction(new ReflectionFunction($counter2));
?>

以上例程的输出类似于:

===> The user-defined function 'counter1'
     declared in Z:\reflectcounter.php
     lines 7 to 11
---> Documentation:
 '/**
 * A simple counter
 *
 * @return    int
 */'
---> Static variables: array (
  'c' => 0,
)


===> The user-defined function '{closure}'
     declared in Z:\reflectcounter.php
     lines 18 to 23
---> Documentation:
 '/**
 * Another simple counter
 *
 * @return    int
 */'
---> Static variables: array (
  'd' => 0,
)

参见