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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Sniffs\MicroOptimizations;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Files\File;
class IsNullSniff implements Sniff
{
/**
* @var string
*/
protected $blacklist = 'is_null';
/**
* @inheritdoc
*/
public function register()
{
return [T_STRING];
}
/**
* @inheritdoc
*/
public function process(File $sourceFile, $stackPtr)
{
$tokens = $sourceFile->getTokens();
if ($tokens[$stackPtr]['content'] === $this->blacklist) {
$sourceFile->addError(
"is_null must be avoided. Use strict comparison instead.",
$stackPtr,
'IsNullUsage'
);
}
}
}