PHP Manual
ReflectionGenerator
Gets the trace of the executing generator

ReflectionGenerator::getTrace

(PHP 7)

ReflectionGenerator::getTrace — Gets the trace of the executing generator

说明

public ReflectionGenerator::getTrace ([ int $options = DEBUG_BACKTRACE_PROVIDE_OBJECT ] ) : array

Get the trace of the currently executing generator.

参数

options

The value of options can be any of the following flags.

**Available options**
Option	Description
`DEBUG_BACKTRACE_PROVIDE_OBJECT`	Default.
`DEBUG_BACKTRACE_IGNORE_ARGS`	Don't include the argument information for functions in the stack trace.

返回值

Returns the trace of the currently executing generator.

范例

Example #1 ReflectionGenerator::getTrace() example

 <?php
function foo() {
    yield 1;
}

function bar()
{
    yield from foo();
}

function baz()
{
    yield from bar();
}

$gen = baz();
$gen->valid(); // start the generator

var_dump((new ReflectionGenerator($gen))->getTrace());

以上例程的输出类似于：

array(2) {
  [0]=>
  array(4) {
    ["file"]=>
    string(18) "example.php"
    ["line"]=>
    int(8)
    ["function"]=>
    string(3) "foo"
    ["args"]=>
    array(0) {
    }
  }
  [1]=>
  array(4) {
    ["file"]=>
    string(18) "example.php"
    ["line"]=>
    int(12)
    ["function"]=>
    string(3) "bar"
    ["args"]=>
    array(0) {
    }
  }
}

参见

ReflectionGenerator::getFunction() - Gets the function name of the generator
ReflectionGenerator::getThis() - Gets the $this value of the generator