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Edit File : FunctionReturnInWriteContextPass.php \| Size : 2.97 KB
<?php /* * This file is part of Psy Shell. * * (c) 2012-2018 Justin Hileman * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Psy\CodeCleaner; use PhpParser\Node; use PhpParser\Node\Expr\Array_; use PhpParser\Node\Expr\Assign; use PhpParser\Node\Expr\Empty_; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Expr\Isset_; use PhpParser\Node\Expr\MethodCall; use PhpParser\Node\Expr\StaticCall; use PhpParser\Node\Stmt\Unset_; use Psy\Exception\FatalErrorException; /* * Validate that the functions are used correctly. * * @author Martin Hasoň <martin.hason@gmail.com> / class FunctionReturnInWriteContextPass extends CodeCleanerPass { const PHP55_MESSAGE = 'Cannot use isset() on the result of a function call (you can use "null !== func()" instead)'; const EXCEPTION_MESSAGE = "Can't use function return value in write context"; private $atLeastPhp55; public function __construct() { $this->atLeastPhp55 = \version_compare(PHP_VERSION, '5.5', '>='); } /* * Validate that the functions are used correctly. * * @throws FatalErrorException if a function is passed as an argument reference * @throws FatalErrorException if a function is used as an argument in the isset * @throws FatalErrorException if a function is used as an argument in the empty, only for PHP < 5.5 * @throws FatalErrorException if a value is assigned to a function * * @param Node $node */ public function enterNode(Node $node) { if ($node instanceof Array_ \|\| $this->isCallNode($node)) { $items = $node instanceof Array_ ? $node->items : $node->args; foreach ($items as $item) { if ($item && $item->byRef && $this->isCallNode($item->value)) { throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine()); } } } elseif ($node instanceof Isset_ \|\| $node instanceof Unset_) { foreach ($node->vars as $var) { if (!$this->isCallNode($var)) { continue; } $msg = ($node instanceof Isset_ && $this->atLeastPhp55) ? self::PHP55_MESSAGE : self::EXCEPTION_MESSAGE; throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine()); } } elseif ($node instanceof Empty_ && !$this->atLeastPhp55 && $this->isCallNode($node->expr)) { throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine()); // @codeCoverageIgnore } elseif ($node instanceof Assign && $this->isCallNode($node->var)) { throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine()); } } private function isCallNode(Node $node) { return $node instanceof FuncCall \|\| $node instanceof MethodCall \|\| $node instanceof StaticCall; } } Back

Edit File : FunctionReturnInWriteContextPass.php | Size : 2.97 KB

<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2018 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\CodeCleaner;

use PhpParser\Node;
use PhpParser\Node\Expr\Array_;
use PhpParser\Node\Expr\Assign;
use PhpParser\Node\Expr\Empty_;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Expr\Isset_;
use PhpParser\Node\Expr\MethodCall;
use PhpParser\Node\Expr\StaticCall;
use PhpParser\Node\Stmt\Unset_;
use Psy\Exception\FatalErrorException;

/**
 * Validate that the functions are used correctly.
 *
 * @author Martin Hasoň <martin.hason@gmail.com>
 */
class FunctionReturnInWriteContextPass extends CodeCleanerPass
{
    const PHP55_MESSAGE = 'Cannot use isset() on the result of a function call (you can use "null !== func()" instead)';
    const EXCEPTION_MESSAGE = "Can't use function return value in write context";

private $atLeastPhp55;

public function __construct()
    {
        $this->atLeastPhp55 = \version_compare(PHP_VERSION, '5.5', '>=');
    }

/**
     * Validate that the functions are used correctly.
     *
     * @throws FatalErrorException if a function is passed as an argument reference
     * @throws FatalErrorException if a function is used as an argument in the isset
     * @throws FatalErrorException if a function is used as an argument in the empty, only for PHP < 5.5
     * @throws FatalErrorException if a value is assigned to a function
     *
     * @param Node $node
     */
    public function enterNode(Node $node)
    {
        if ($node instanceof Array_ || $this->isCallNode($node)) {
            $items = $node instanceof Array_ ? $node->items : $node->args;
            foreach ($items as $item) {
                if ($item && $item->byRef && $this->isCallNode($item->value)) {
                    throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine());
                }
            }
        } elseif ($node instanceof Isset_ || $node instanceof Unset_) {
            foreach ($node->vars as $var) {
                if (!$this->isCallNode($var)) {
                    continue;
                }

$msg = ($node instanceof Isset_ && $this->atLeastPhp55) ? self::PHP55_MESSAGE : self::EXCEPTION_MESSAGE;
                throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine());
            }
        } elseif ($node instanceof Empty_ && !$this->atLeastPhp55 && $this->isCallNode($node->expr)) {
            throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine()); // @codeCoverageIgnore
        } elseif ($node instanceof Assign && $this->isCallNode($node->var)) {
            throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine());
        }
    }

private function isCallNode(Node $node)
    {
        return $node instanceof FuncCall || $node instanceof MethodCall || $node instanceof StaticCall;
    }
}

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