ReflectionFunction::__construct

Constructs a ReflectionFunction object

&reftitle.description; public `ReflectionFunction::__construct` ``Closure``string```function`

Constructs a `ReflectionFunction` object.

&reftitle.parameters;

`function`

- The name of the function to reflect or a closure.

&reftitle.errors;

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

&reftitle.examples;

### `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 = $func->getStaticVariables())
        {
            printf("---> Static variables: %s\n", var_export($statics, 1));
        }
    }

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

&example.outputs.similar;

    ===> 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,
    )

&reftitle.seealso;

- `ReflectionMethod::__construct`
- Constructors