Created
March 22, 2017 04:38
-
-
Save zonuexe/882269ae5dcf0411701ed98d0f4315f8 to your computer and use it in GitHub Desktop.
get_var_name.php
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
include_once getenv('HOME') . '/.composer/vendor/autoload.php'; | |
use PhpParser\Node; | |
use PhpParser\NodeTraverser; | |
use PhpParser\NodeVisitorAbstract; | |
use PhpParser\ParserFactory; | |
use PhpParser\PrettyPrinter; | |
/** | |
* @return string[] | |
*/ | |
function get_var_name(...$args) | |
{ | |
$trace = debug_backtrace(0, 1); | |
$recent = array_shift($trace); | |
$parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7); | |
if (!file_exists($recent['file'])) { | |
return []; | |
} | |
$code = file_get_contents($recent['file']); | |
$visitor = new class($recent['line'], count($args)) extends \PhpParser\NodeVisitorAbstract { | |
public $result = []; | |
private $line; | |
private $args_num; | |
public function __construct($line, $args_num) | |
{ | |
$this->line = $line; | |
$this->args_num = $args_num; | |
} | |
public function leaveNode(Node $node) | |
{ | |
if ( | |
$node instanceof Node\Expr\FuncCall | |
&& $node->name->parts[0] === 'get_var_name' | |
&& count($node->args) === $this->args_num | |
) { | |
$attr = $node->getAttributes(); | |
$d = intdiv($attr['startLine'] + $attr['endLine'], 2); | |
//var_dump([$this->line => $d]); | |
$fline = ($attr['startLine'] == $attr['endLine']) | |
? $attr['startLine'] | |
: $d + (($attr['endLine'] - $attr['startLine']) % 2); | |
if ($this->line !== $fline) { | |
return; | |
} | |
$arg_names = []; | |
foreach ($node->args as $a) { | |
if ($a->value instanceof Node\Expr\Variable) { | |
$arg_names[] = '$'.$a->value->name; | |
} else { | |
$arg_names[] = '[value]'; | |
} | |
} | |
$this->result = $arg_names; | |
} | |
} | |
}; | |
$traverser = new NodeTraverser; | |
$traverser->addVisitor($visitor); | |
$traverser->traverse($parser->parse($code)); | |
return $visitor->result; | |
} | |
$a = 1; | |
$b = 2; | |
$hoge = $fuga = $piyo = null; | |
var_dump(get_var_name($a, | |
$b)); | |
var_dump(get_var_name($GLOBALS, $b)); | |
var_dump(get_var_name( | |
$hoge, | |
$fuga, | |
1, | |
$piyo)); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment