src/Fixer/Alias/SetTypeToCastFixer.php
protected function applyFix(\SplFileInfo $file, Tokens $tokens)
    {
        $map = [
            'array' => [T_ARRAY_CAST, '(array)'],
            'bool' => [T_BOOL_CAST, '(bool)'],
            'boolean' => [T_BOOL_CAST, '(bool)'],
            'double' => [T_DOUBLE_CAST, '(float)'],
            'float' => [T_DOUBLE_CAST, '(float)'],
            'int' => [T_INT_CAST, '(int)'],
            'integer' => [T_INT_CAST, '(int)'],
            'object' => [T_OBJECT_CAST, '(object)'],
            'string' => [T_STRING_CAST, '(string)'],
            // note: `'null' is dealt with later on
        ];

        $argumentsAnalyzer = new ArgumentsAnalyzer();

        foreach (array_reverse($this->findSettypeCalls($tokens)) as $candidate) {
            $functionNameIndex = $candidate[0];

            $arguments = $argumentsAnalyzer->getArguments($tokens, $candidate[1], $candidate[2]);
            if (2 !== \count($arguments)) {
                continue; // function must be overridden or used incorrectly
            }

            $prev = $tokens->getPrevMeaningfulToken($functionNameIndex);
            if (!$tokens[$prev]->isGivenKind(T_OPEN_TAG) && !$tokens[$prev]->equalsAny([';', '{'])) {
                continue; // return value of the function is used
            }

            reset($arguments);

            // --- Test first argument --------------------

            $firstArgumentStart = key($arguments);
            if ($tokens[$firstArgumentStart]->isComment() || $tokens[$firstArgumentStart]->isWhitespace()) {
                $firstArgumentStart = $tokens->getNextMeaningfulToken($firstArgumentStart);
            }

            if (!$tokens[$firstArgumentStart]->isGivenKind(T_VARIABLE)) {
                continue; // settype only works with variables pass by reference, function must be overridden
            }

            $commaIndex = $tokens->getNextMeaningfulToken($firstArgumentStart);

            if (null === $commaIndex || !$tokens[$commaIndex]->equals(',')) {
                continue; // first argument is complex statement; function must be overridden
            }

            // --- Test second argument -------------------

            next($arguments);
            $secondArgumentStart = key($arguments);
            $secondArgumentEnd = $arguments[$secondArgumentStart];

            if ($tokens[$secondArgumentStart]->isComment() || $tokens[$secondArgumentStart]->isWhitespace()) {
                $secondArgumentStart = $tokens->getNextMeaningfulToken($secondArgumentStart);
            }

            if (
                !$tokens[$secondArgumentStart]->isGivenKind(T_CONSTANT_ENCAPSED_STRING)
                || $tokens->getNextMeaningfulToken($secondArgumentStart) < $secondArgumentEnd
            ) {
                continue; // second argument is of the wrong type or is a (complex) statement of some sort (function is overridden)
            }

            // --- Test type ------------------------------

            $type = strtolower(trim($tokens[$secondArgumentStart]->getContent(), '"\'"'));

            if ('null' !== $type && !isset($map[$type])) {
                continue; // we don't know how to map
            }

            // --- Fixing ---------------------------------

            $argumentToken = $tokens[$firstArgumentStart];

            $this->removeSettypeCall(
                $tokens,
                $functionNameIndex,
                $candidate[1],
                $firstArgumentStart,
                $commaIndex,
                $secondArgumentStart,
                $candidate[2]
            );

            if ('null' === $type) {
                $this->findSettypeNullCall($tokens, $functionNameIndex, $argumentToken);
            } else {
                $this->fixSettypeCall($tokens, $functionNameIndex, $argumentToken, new Token($map[$type]));
            }
        }
    }
protected function applyFix(\SplFileInfo $file, Tokens $tokens)
    {
        $map = [
            'array' => [T_ARRAY_CAST, '(array)'],
            'bool' => [T_BOOL_CAST, '(bool)'],
            'boolean' => [T_BOOL_CAST, '(bool)'],
            'double' => [T_DOUBLE_CAST, '(float)'],
            'float' => [T_DOUBLE_CAST, '(float)'],
            'int' => [T_INT_CAST, '(int)'],
            'integer' => [T_INT_CAST, '(int)'],
            'object' => [T_OBJECT_CAST, '(object)'],
            'string' => [T_STRING_CAST, '(string)'],
            // note: `'null' is dealt with later on
        ];

        $argumentsAnalyzer = new ArgumentsAnalyzer();

        foreach (array_reverse($this->findSettypeCalls($tokens)) as $candidate) {
            $functionNameIndex = $candidate[0];

            $arguments = $argumentsAnalyzer->getArguments($tokens, $candidate[1], $candidate[2]);
            if (2 !== \count($arguments)) {
                continue; // function must be overridden or used incorrectly
            }

            $prev = $tokens->getPrevMeaningfulToken($functionNameIndex);
            if (!$tokens[$prev]->isGivenKind(T_OPEN_TAG) && !$tokens[$prev]->equalsAny([';', '{'])) {
                continue; // return value of the function is used
            }

            reset($arguments);

            // --- Test first argument --------------------

            $firstArgumentStart = key($arguments);
            if ($tokens[$firstArgumentStart]->isComment() || $tokens[$firstArgumentStart]->isWhitespace()) {
                $firstArgumentStart = $tokens->getNextMeaningfulToken($firstArgumentStart);
            }

            if (!$tokens[$firstArgumentStart]->isGivenKind(T_VARIABLE)) {
                continue; // settype only works with variables pass by reference, function must be overridden
            }

            $commaIndex = $tokens->getNextMeaningfulToken($firstArgumentStart);

            if (null === $commaIndex || !$tokens[$commaIndex]->equals(',')) {
                continue; // first argument is complex statement; function must be overridden
            }

            // --- Test second argument -------------------

            next($arguments);
            $secondArgumentStart = key($arguments);
            $secondArgumentEnd = $arguments[$secondArgumentStart];

            if ($tokens[$secondArgumentStart]->isComment() || $tokens[$secondArgumentStart]->isWhitespace()) {
                $secondArgumentStart = $tokens->getNextMeaningfulToken($secondArgumentStart);
            }

            if (
                !$tokens[$secondArgumentStart]->isGivenKind(T_CONSTANT_ENCAPSED_STRING)
                || $tokens->getNextMeaningfulToken($secondArgumentStart) < $secondArgumentEnd
            ) {
                continue; // second argument is of the wrong type or is a (complex) statement of some sort (function is overridden)
            }

            // --- Test type ------------------------------

            $type = strtolower(trim($tokens[$secondArgumentStart]->getContent(), '"\'"'));

            if ('null' !== $type && !isset($map[$type])) {
                continue; // we don't know how to map
            }

            // --- Fixing ---------------------------------

            $argumentToken = $tokens[$firstArgumentStart];

            $this->removeSettypeCall(
                $tokens,
                $functionNameIndex,
                $candidate[1],
                $firstArgumentStart,
                $commaIndex,
                $secondArgumentStart,
                $candidate[2]
            );

            if ('null' === $type) {
                $this->findSettypeNullCall($tokens, $functionNameIndex, $argumentToken);
            } else {
                $this->fixSettypeCall($tokens, $functionNameIndex, $argumentToken, new Token($map[$type]));
            }
        }
    }
{@inheritdoc}