File "NewExecutionDirectivesSniff.php"
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<?php
/**
* PHPCompatibility, an external standard for PHP_CodeSniffer.
*
* @package PHPCompatibility
* @copyright 2012-2019 PHPCompatibility Contributors
* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
* @link https://github.com/PHPCompatibility/PHPCompatibility
*/
namespace PHPCompatibility\Sniffs\ControlStructures;
use PHPCompatibility\AbstractNewFeatureSniff;
use PHPCompatibility\PHPCSHelper;
use PHP_CodeSniffer_File as File;
use PHP_CodeSniffer_Tokens as Tokens;
/**
* Check for valid execution directives set with `declare()`.
*
* The sniff contains three distinct checks:
* - Check if the execution directive used is valid. PHP currently only supports
* three execution directives.
* - Check if the execution directive used is available in the PHP versions
* for which support is being checked.
* In the case of the `encoding` directive on PHP 5.3, support is conditional
* on the `--enable-zend-multibyte` compilation option. This will be indicated as such.
* - Check whether the value for the directive is valid.
*
* PHP version All
*
* @link https://www.php.net/manual/en/control-structures.declare.php
* @link https://wiki.php.net/rfc/scalar_type_hints_v5#strict_types_declare_directive
*
* @since 7.0.3
* @since 7.1.0 Now extends the `AbstractNewFeatureSniff` instead of the base `Sniff` class.
*/
class NewExecutionDirectivesSniff extends AbstractNewFeatureSniff
{
/**
* A list of new execution directives
*
* The array lists : version number with false (not present) or true (present).
* If the execution order is conditional, add the condition as a string to the version nr.
* If's sufficient to list the first version where the execution directive appears.
*
* @since 7.0.3
*
* @var array(string => array(string => bool|string|array))
*/
protected $newDirectives = array(
'ticks' => array(
'3.1' => false,
'4.0' => true,
'valid_value_callback' => 'isNumeric',
),
'encoding' => array(
'5.2' => false,
'5.3' => '--enable-zend-multibyte', // Directive ignored unless.
'5.4' => true,
'valid_value_callback' => 'validEncoding',
),
'strict_types' => array(
'5.6' => false,
'7.0' => true,
'valid_values' => array(1),
),
);
/**
* Tokens to ignore when trying to find the value for the directive.
*
* @since 7.0.3
*
* @var array
*/
protected $ignoreTokens = array();
/**
* Returns an array of tokens this test wants to listen for.
*
* @since 7.0.3
*
* @return array
*/
public function register()
{
$this->ignoreTokens = Tokens::$emptyTokens;
$this->ignoreTokens[\T_EQUAL] = \T_EQUAL;
return array(\T_DECLARE);
}
/**
* Processes this test, when one of its tokens is encountered.
*
* @since 7.0.3
*
* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the current token in
* the stack passed in $tokens.
*
* @return void
*/
public function process(File $phpcsFile, $stackPtr)
{
$tokens = $phpcsFile->getTokens();
if (isset($tokens[$stackPtr]['parenthesis_opener'], $tokens[$stackPtr]['parenthesis_closer']) === true) {
$openParenthesis = $tokens[$stackPtr]['parenthesis_opener'];
$closeParenthesis = $tokens[$stackPtr]['parenthesis_closer'];
} else {
if (version_compare(PHPCSHelper::getVersion(), '2.3.4', '>=')) {
return;
}
// Deal with PHPCS 2.3.0-2.3.3 which do not yet set the parenthesis properly for declare statements.
$openParenthesis = $phpcsFile->findNext(\T_OPEN_PARENTHESIS, ($stackPtr + 1), null, false, null, true);
if ($openParenthesis === false || isset($tokens[$openParenthesis]['parenthesis_closer']) === false) {
return;
}
$closeParenthesis = $tokens[$openParenthesis]['parenthesis_closer'];
}
$directivePtr = $phpcsFile->findNext(\T_STRING, ($openParenthesis + 1), $closeParenthesis, false);
if ($directivePtr === false) {
return;
}
$directiveContent = $tokens[$directivePtr]['content'];
if (isset($this->newDirectives[$directiveContent]) === false) {
$error = 'Declare can only be used with the directives %s. Found: %s';
$data = array(
implode(', ', array_keys($this->newDirectives)),
$directiveContent,
);
$phpcsFile->addError($error, $stackPtr, 'InvalidDirectiveFound', $data);
} else {
// Check for valid directive for version.
$itemInfo = array(
'name' => $directiveContent,
);
$this->handleFeature($phpcsFile, $stackPtr, $itemInfo);
// Check for valid directive value.
$valuePtr = $phpcsFile->findNext($this->ignoreTokens, $directivePtr + 1, $closeParenthesis, true);
if ($valuePtr === false) {
return;
}
$this->addWarningOnInvalidValue($phpcsFile, $valuePtr, $directiveContent);
}
}
/**
* Determine whether an error/warning should be thrown for an item based on collected information.
*
* @since 7.1.0
*
* @param array $errorInfo Detail information about an item.
*
* @return bool
*/
protected function shouldThrowError(array $errorInfo)
{
return ($errorInfo['not_in_version'] !== '' || $errorInfo['conditional_version'] !== '');
}
/**
* Get the relevant sub-array for a specific item from a multi-dimensional array.
*
* @since 7.1.0
*
* @param array $itemInfo Base information about the item.
*
* @return array Version and other information about the item.
*/
public function getItemArray(array $itemInfo)
{
return $this->newDirectives[$itemInfo['name']];
}
/**
* Get an array of the non-PHP-version array keys used in a sub-array.
*
* @since 7.1.0
*
* @return array
*/
protected function getNonVersionArrayKeys()
{
return array(
'valid_value_callback',
'valid_values',
);
}
/**
* Retrieve the relevant detail (version) information for use in an error message.
*
* @since 7.1.0
*
* @param array $itemArray Version and other information about the item.
* @param array $itemInfo Base information about the item.
*
* @return array
*/
public function getErrorInfo(array $itemArray, array $itemInfo)
{
$errorInfo = parent::getErrorInfo($itemArray, $itemInfo);
$errorInfo['conditional_version'] = '';
$errorInfo['condition'] = '';
$versionArray = $this->getVersionArray($itemArray);
if (empty($versionArray) === false) {
foreach ($versionArray as $version => $present) {
if (\is_string($present) === true && $this->supportsBelow($version) === true) {
// We cannot test for compilation option (ok, except by scraping the output of phpinfo...).
$errorInfo['conditional_version'] = $version;
$errorInfo['condition'] = $present;
}
}
}
return $errorInfo;
}
/**
* Get the error message template for this sniff.
*
* @since 7.1.0
*
* @return string
*/
protected function getErrorMsgTemplate()
{
return 'Directive ' . parent::getErrorMsgTemplate();
}
/**
* Generates the error or warning for this item.
*
* @since 7.0.3
* @since 7.1.0 This method now overloads the method from the `AbstractNewFeatureSniff` class.
* - Renamed from `maybeAddError()` to `addError()`.
* - Changed visibility from `protected` to `public`.
*
* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the relevant token in
* the stack.
* @param array $itemInfo Base information about the item.
* @param array $errorInfo Array with detail (version) information
* relevant to the item.
*
* @return void
*/
public function addError(File $phpcsFile, $stackPtr, array $itemInfo, array $errorInfo)
{
if ($errorInfo['not_in_version'] !== '') {
parent::addError($phpcsFile, $stackPtr, $itemInfo, $errorInfo);
} elseif ($errorInfo['conditional_version'] !== '') {
$error = 'Directive %s is present in PHP version %s but will be disregarded unless PHP is compiled with %s';
$errorCode = $this->stringToErrorCode($itemInfo['name']) . 'WithConditionFound';
$data = array(
$itemInfo['name'],
$errorInfo['conditional_version'],
$errorInfo['condition'],
);
$phpcsFile->addWarning($error, $stackPtr, $errorCode, $data);
}
}
/**
* Generates a error or warning for this sniff.
*
* @since 7.0.3
* @since 7.0.6 Renamed from `addErrorOnInvalidValue()` to `addWarningOnInvalidValue()`.
*
* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the execution directive value
* in the token array.
* @param string $directive The directive.
*
* @return void
*/
protected function addWarningOnInvalidValue(File $phpcsFile, $stackPtr, $directive)
{
$tokens = $phpcsFile->getTokens();
$value = $tokens[$stackPtr]['content'];
if (isset(Tokens::$stringTokens[$tokens[$stackPtr]['code']]) === true) {
$value = $this->stripQuotes($value);
}
$isError = false;
if (isset($this->newDirectives[$directive]['valid_values'])) {
if (\in_array($value, $this->newDirectives[$directive]['valid_values']) === false) {
$isError = true;
}
} elseif (isset($this->newDirectives[$directive]['valid_value_callback'])) {
$valid = \call_user_func(array($this, $this->newDirectives[$directive]['valid_value_callback']), $value);
if ($valid === false) {
$isError = true;
}
}
if ($isError === true) {
$error = 'The execution directive %s does not seem to have a valid value. Please review. Found: %s';
$errorCode = $this->stringToErrorCode($directive) . 'InvalidValueFound';
$data = array(
$directive,
$value,
);
$phpcsFile->addWarning($error, $stackPtr, $errorCode, $data);
}
}
/**
* Check whether a value is numeric.
*
* Callback function to test whether the value for an execution directive is valid.
*
* @since 7.0.3
*
* @param mixed $value The value to test.
*
* @return bool
*/
protected function isNumeric($value)
{
return is_numeric($value);
}
/**
* Check whether a value is a valid encoding.
*
* Callback function to test whether the value for an execution directive is valid.
*
* @since 7.0.3
*
* @param mixed $value The value to test.
*
* @return bool
*/
protected function validEncoding($value)
{
static $encodings;
if (isset($encodings) === false && function_exists('mb_list_encodings')) {
$encodings = mb_list_encodings();
}
if (empty($encodings) || \is_array($encodings) === false) {
// If we can't test the encoding, let it pass through.
return true;
}
return \in_array($value, $encodings, true);
}
}