232 lines
8.6 KiB
PHP
232 lines
8.6 KiB
PHP
<?php
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/**
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* PHPCompatibility, an external standard for PHP_CodeSniffer.
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*
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* @package PHPCompatibility
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* @copyright 2012-2019 PHPCompatibility Contributors
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* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
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* @link https://github.com/PHPCompatibility/PHPCompatibility
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*/
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namespace PHPCompatibility\Sniffs\ParameterValues;
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use PHPCompatibility\AbstractFunctionCallParameterSniff;
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use PHP_CodeSniffer_File as File;
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use PHP_CodeSniffer_Tokens as Tokens;
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/**
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* Detect calls to Iconv and Mbstring functions with the optional `$charset`/`$encoding` parameter not set.
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*
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* The default value for the iconv `$charset` and the MbString $encoding` parameters was changed
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* in PHP 5.6 to the value of `default_charset`, which defaults to `UTF-8`.
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*
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* Previously, the iconv functions would default to the value of `iconv.internal_encoding`;
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* The Mbstring functions would default to the return value of `mb_internal_encoding()`.
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* In both case, this would normally come down to `ISO-8859-1`.
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*
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* PHP version 5.6
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*
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* @link https://www.php.net/manual/en/migration56.new-features.php#migration56.new-features.default-encoding
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* @link https://www.php.net/manual/en/migration56.deprecated.php#migration56.deprecated.iconv-mbstring-encoding
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* @link https://wiki.php.net/rfc/default_encoding
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*
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* @since 9.3.0
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*/
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class NewIconvMbstringCharsetDefaultSniff extends AbstractFunctionCallParameterSniff
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{
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/**
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* Functions to check for.
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*
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* Only those functions where the charset/encoding parameter is optional need to be listed.
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*
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* Key is the function name, value the 1-based parameter position of
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* the $charset/$encoding parameter.
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*
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* @since 9.3.0
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*
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* @var array
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*/
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protected $targetFunctions = array(
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'iconv_mime_decode_headers' => 3,
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'iconv_mime_decode' => 3,
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'iconv_mime_encode' => 3, // Special case.
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'iconv_strlen' => 2,
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'iconv_strpos' => 4,
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'iconv_strrpos' => 3,
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'iconv_substr' => 4,
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'mb_check_encoding' => 2,
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'mb_chr' => 2,
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'mb_convert_case' => 3,
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'mb_convert_encoding' => 3,
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'mb_convert_kana' => 3,
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'mb_decode_numericentity' => 3,
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'mb_encode_numericentity' => 3,
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'mb_ord' => 2,
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'mb_scrub' => 2,
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'mb_strcut' => 4,
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'mb_stripos' => 4,
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'mb_stristr' => 4,
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'mb_strlen' => 2,
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'mb_strpos' => 4,
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'mb_strrchr' => 4,
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'mb_strrichr' => 4,
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'mb_strripos' => 4,
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'mb_strrpos' => 4,
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'mb_strstr' => 4,
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'mb_strtolower' => 2,
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'mb_strtoupper' => 2,
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'mb_strwidth' => 2,
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'mb_substr_count' => 3,
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'mb_substr' => 4,
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);
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/**
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* Do a version check to determine if this sniff needs to run at all.
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*
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* Note: This sniff should only trigger errors when both PHP 5.5 or lower,
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* as well as PHP 5.6 or higher need to be supported within the application.
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*
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* @since 9.3.0
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*
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* @return bool
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*/
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protected function bowOutEarly()
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{
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return ($this->supportsBelow('5.5') === false || $this->supportsAbove('5.6') === false);
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}
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/**
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* Process the parameters of a matched function.
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*
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* @since 9.3.0
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*
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* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token in the stack.
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* @param string $functionName The token content (function name) which was matched.
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* @param array $parameters Array with information about the parameters.
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*
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* @return int|void Integer stack pointer to skip forward or void to continue
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* normal file processing.
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*/
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public function processParameters(File $phpcsFile, $stackPtr, $functionName, $parameters)
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{
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$functionLC = strtolower($functionName);
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if ($functionLC === 'iconv_mime_encode') {
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// Special case the iconv_mime_encode() function.
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return $this->processIconvMimeEncode($phpcsFile, $stackPtr, $functionName, $parameters);
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}
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if (isset($parameters[$this->targetFunctions[$functionLC]]) === true) {
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return;
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}
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$paramName = '$encoding';
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if (strpos($functionLC, 'iconv_') === 0) {
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$paramName = '$charset';
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} elseif ($functionLC === 'mb_convert_encoding') {
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$paramName = '$from_encoding';
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}
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$error = 'The default value of the %1$s parameter for %2$s() was changed from ISO-8859-1 to UTF-8 in PHP 5.6. For cross-version compatibility, the %1$s parameter should be explicitly set.';
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$data = array(
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$paramName,
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$functionName,
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);
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$phpcsFile->addError($error, $stackPtr, 'NotSet', $data);
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}
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/**
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* Process the parameters of a matched call to the iconv_mime_encode() function.
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*
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* @since 9.3.0
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*
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* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token in the stack.
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* @param string $functionName The token content (function name) which was matched.
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* @param array $parameters Array with information about the parameters.
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*
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* @return int|void Integer stack pointer to skip forward or void to continue
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* normal file processing.
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*/
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public function processIconvMimeEncode(File $phpcsFile, $stackPtr, $functionName, $parameters)
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{
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$error = 'The default value of the %s parameter index for iconv_mime_encode() was changed from ISO-8859-1 to UTF-8 in PHP 5.6. For cross-version compatibility, the %s should be explicitly set.';
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$functionLC = strtolower($functionName);
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if (isset($parameters[$this->targetFunctions[$functionLC]]) === false) {
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$phpcsFile->addError(
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$error,
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$stackPtr,
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'PreferencesNotSet',
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array(
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'$preferences[\'input/output-charset\']',
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'$preferences[\'input-charset\'] and $preferences[\'output-charset\'] indexes',
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)
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);
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return;
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}
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$tokens = $phpcsFile->getTokens();
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$targetParam = $parameters[$this->targetFunctions[$functionLC]];
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$firstNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, $targetParam['start'], ($targetParam['end'] + 1), true);
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if ($firstNonEmpty === false) {
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// Parse error or live coding.
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return;
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}
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if ($tokens[$firstNonEmpty]['code'] === \T_ARRAY
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|| $tokens[$firstNonEmpty]['code'] === \T_OPEN_SHORT_ARRAY
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) {
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$hasInputCharset = preg_match('`([\'"])input-charset\1\s*=>`', $targetParam['raw']);
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$hasOutputCharset = preg_match('`([\'"])output-charset\1\s*=>`', $targetParam['raw']);
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if ($hasInputCharset === 1 && $hasOutputCharset === 1) {
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// Both input as well as output charset are set.
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return;
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}
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if ($hasInputCharset !== 1) {
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$phpcsFile->addError(
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$error,
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$firstNonEmpty,
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'InputPreferenceNotSet',
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array(
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'$preferences[\'input-charset\']',
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'$preferences[\'input-charset\'] index',
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)
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);
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}
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if ($hasOutputCharset !== 1) {
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$phpcsFile->addError(
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$error,
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$firstNonEmpty,
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'OutputPreferenceNotSet',
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array(
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'$preferences[\'output-charset\']',
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'$preferences[\'output-charset\'] index',
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)
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);
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}
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return;
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}
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// The $preferences parameter was passed, but it was a variable/constant/output of a function call.
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$phpcsFile->addWarning(
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$error,
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$firstNonEmpty,
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'Undetermined',
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array(
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'$preferences[\'input/output-charset\']',
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'$preferences[\'input-charset\'] and $preferences[\'output-charset\'] indexes',
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)
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);
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}
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}
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