/
StatementsAnalyzer.php
2230 lines (1955 loc) · 84.5 KB
/
StatementsAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer;
use PhpParser;
use Psalm\Aliases;
use Psalm\Internal\Analyzer\Statements\Block\DoAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\ForAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\ForeachAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\IfAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\SwitchAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\TryAnalyzer;
use Psalm\Internal\Analyzer\Statements\Block\WhileAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\Assignment\PropertyAssignmentAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\BinaryOpAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\CallAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ConstFetchAnalyzer;
use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
use Psalm\Internal\Analyzer\Statements\ReturnAnalyzer;
use Psalm\Internal\Analyzer\Statements\ThrowAnalyzer;
use Psalm\Internal\Provider\FileProvider;
use Psalm\Internal\Visitor\CheckTrivialExprVisitor;
use Psalm\Codebase;
use Psalm\CodeLocation;
use Psalm\Config;
use Psalm\Context;
use Psalm\DocComment;
use Psalm\Exception\DocblockParseException;
use Psalm\FileManipulation;
use Psalm\Internal\FileManipulation\FileManipulationBuffer;
use Psalm\Issue\ContinueOutsideLoop;
use Psalm\Issue\ForbiddenCode;
use Psalm\Issue\ForbiddenEcho;
use Psalm\Issue\InvalidDocblock;
use Psalm\Issue\InvalidGlobal;
use Psalm\Issue\UnevaluatedCode;
use Psalm\Issue\UnrecognizedStatement;
use Psalm\Issue\UnusedVariable;
use Psalm\IssueBuffer;
use Psalm\StatementsSource;
use Psalm\Type;
use function strtolower;
use function fwrite;
use const STDERR;
use function array_filter;
use function array_map;
use function preg_split;
use function array_diff;
use function is_string;
use function get_class;
use function in_array;
use function strrpos;
use function strlen;
use function substr;
use function array_key_exists;
use function count;
use function array_shift;
use function explode;
use function array_pop;
use function implode;
use function array_change_key_case;
use function token_get_all;
use function token_name;
use function array_slice;
use function array_reverse;
use function is_array;
use function trim;
use function is_null;
use function array_column;
use function array_combine;
use Psalm\Storage\FunctionLikeParameter;
/**
* @internal
*/
class StatementsAnalyzer extends SourceAnalyzer implements StatementsSource
{
/**
* @var SourceAnalyzer
*/
protected $source;
/**
* @var FileAnalyzer
*/
protected $file_analyzer;
/**
* @var Codebase
*/
protected $codebase;
/**
* @var array<string, CodeLocation>
*/
private $all_vars = [];
/**
* @var array<string, int>
*/
private $var_branch_points = [];
/**
* Possibly undefined variables should be initialised if we're altering code
*
* @var array<string, int>|null
*/
private $vars_to_initialize;
/**
* @var array<string, FunctionAnalyzer>
*/
private $function_analyzers = [];
/**
* @var array<string, array{0: string, 1: CodeLocation}>
*/
private $unused_var_locations = [];
/**
* @var array<string, bool>
*/
private $used_var_locations = [];
/**
* @var ?array<string, bool>
*/
private $byref_uses;
/**
* @var array{description:string, specials:array<string, array<int, string>>}|null
*/
private $parsed_docblock = null;
/**
* @var array<string, CodeLocation>
*/
private $removed_unref_vars = [];
/**
* @var ?string
*/
private $fake_this_class = null;
/**
* @param SourceAnalyzer $source
*/
public function __construct(SourceAnalyzer $source)
{
$this->source = $source;
$this->file_analyzer = $source->getFileAnalyzer();
$this->codebase = $source->getCodebase();
}
/**
* Checks an array of statements for validity
*
* @param array<PhpParser\Node\Stmt> $stmts
* @param Context $context
* @param Context|null $global_context
* @param bool $root_scope
*
* @return null|false
*/
public function analyze(
array $stmts,
Context $context,
Context $global_context = null,
$root_scope = false
) {
$has_returned = false;
// hoist functions to the top
foreach ($stmts as $stmt) {
if ($stmt instanceof PhpParser\Node\Stmt\Function_) {
try {
$function_analyzer = new FunctionAnalyzer($stmt, $this->source);
$this->function_analyzers[strtolower($stmt->name->name)] = $function_analyzer;
} catch (\UnexpectedValueException $e) {
// do nothing
}
}
}
$project_analyzer = $this->getFileAnalyzer()->project_analyzer;
$codebase = $project_analyzer->getCodebase();
if ($codebase->config->hoist_constants) {
foreach ($stmts as $stmt) {
if ($stmt instanceof PhpParser\Node\Stmt\Const_) {
foreach ($stmt->consts as $const) {
$this->setConstType(
$const->name->name,
self::getSimpleType($codebase, $const->value, $this->getAliases(), $this)
?: Type::getMixed(),
$context
);
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression
&& $stmt->expr instanceof PhpParser\Node\Expr\FuncCall
&& $stmt->expr->name instanceof PhpParser\Node\Name
&& $stmt->expr->name->parts === ['define']
&& isset($stmt->expr->args[1])
) {
$const_name = static::getConstName($stmt->expr->args[0]->value, $codebase, $this->getAliases());
if ($const_name !== null) {
$this->setConstType(
$const_name,
self::getSimpleType($codebase, $stmt->expr->args[1]->value, $this->getAliases(), $this)
?: Type::getMixed(),
$context
);
}
}
}
}
$original_context = null;
if ($context->loop_scope) {
$original_context = clone $context->loop_scope->loop_parent_context;
}
$plugin_classes = $codebase->config->after_statement_checks;
foreach ($stmts as $stmt) {
$ignore_variable_property = false;
$ignore_variable_method = false;
if ($has_returned && !($stmt instanceof PhpParser\Node\Stmt\Nop) &&
!($stmt instanceof PhpParser\Node\Stmt\InlineHTML)
) {
if ($context->collect_references) {
if (IssueBuffer::accepts(
new UnevaluatedCode(
'Expressions after return/throw/continue',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
}
break;
}
if ($project_analyzer->debug_lines) {
fwrite(STDERR, $this->getFilePath() . ':' . $stmt->getLine() . "\n");
}
/*
if (isset($context->vars_in_scope['$array']) && !$stmt instanceof PhpParser\Node\Stmt\Nop) {
var_dump($stmt->getLine(), $context->vars_in_scope['$array']);
}
*/
$new_issues = null;
if ($docblock = $stmt->getDocComment()) {
try {
$this->parsed_docblock = DocComment::parsePreservingLength($docblock);
} catch (DocblockParseException $e) {
if (IssueBuffer::accepts(
new InvalidDocblock(
(string)$e->getMessage(),
new CodeLocation($this->getSource(), $stmt, null, true)
)
)) {
// fall through
}
$this->parsed_docblock = null;
}
$comments = $this->parsed_docblock;
if (isset($comments['specials']['psalm-scope-this'])) {
$trimmed = trim(\reset($comments['specials']['psalm-scope-this']));
if (!$codebase->classExists($trimmed)) {
if (IssueBuffer::accepts(
new \Psalm\Issue\UndefinedDocblockClass(
'Scope class ' . $trimmed . ' does not exist',
new CodeLocation($this->getSource(), $stmt, null, true),
$trimmed
)
)) {
// fall through
}
} else {
$this_type = Type::parseString($trimmed);
$context->self = $trimmed;
$context->vars_in_scope['$this'] = $this_type;
$this->setFQCLN($trimmed);
}
}
if (isset($comments['specials']['psalm-suppress'])) {
$suppressed = array_filter(
array_map(
/**
* @param string $line
*
* @return string
*/
function ($line) {
return preg_split('/[\s]+/', $line)[0];
},
$comments['specials']['psalm-suppress']
)
);
if ($suppressed) {
$new_issues = [];
foreach ($suppressed as $offset => $issue_type) {
$offset += $docblock->getFilePos();
$new_issues[$offset] = $issue_type;
if ($issue_type === 'InaccessibleMethod') {
continue;
}
if ($codebase->track_unused_suppressions) {
IssueBuffer::addUnusedSuppression($this->getFilePath(), $offset, $issue_type);
}
}
$this->addSuppressedIssues($new_issues);
}
}
if (isset($comments['specials']['psalm-ignore-variable-method'])) {
$context->ignore_variable_method = $ignore_variable_method = true;
}
if (isset($comments['specials']['psalm-ignore-variable-property'])) {
$context->ignore_variable_property = $ignore_variable_property = true;
}
} else {
$this->parsed_docblock = null;
}
if ($stmt instanceof PhpParser\Node\Stmt\If_) {
if (IfAnalyzer::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\TryCatch) {
if (TryAnalyzer::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\For_) {
if (ForAnalyzer::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Foreach_) {
if (ForeachAnalyzer::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\While_) {
if (WhileAnalyzer::analyze($this, $stmt, $context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Do_) {
DoAnalyzer::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Const_) {
$this->analyzeConstAssignment($stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Unset_) {
$this->analyzeUnset($stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Return_) {
$has_returned = true;
ReturnAnalyzer::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Throw_) {
$has_returned = true;
ThrowAnalyzer::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Switch_) {
SwitchAnalyzer::analyze($this, $stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Break_) {
$loop_scope = $context->loop_scope;
if ($loop_scope && $original_context) {
if ($context->inside_case && !$stmt->num) {
$loop_scope->final_actions[] = ScopeAnalyzer::ACTION_LEAVE_SWITCH;
} else {
$loop_scope->final_actions[] = ScopeAnalyzer::ACTION_BREAK;
}
$redefined_vars = $context->getRedefinedVars($loop_scope->loop_parent_context->vars_in_scope);
if ($loop_scope->possibly_redefined_loop_parent_vars === null) {
$loop_scope->possibly_redefined_loop_parent_vars = $redefined_vars;
} else {
foreach ($redefined_vars as $var => $type) {
if ($type->hasMixed()) {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = $type;
} elseif (isset($loop_scope->possibly_redefined_loop_parent_vars[$var])) {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = Type::combineUnionTypes(
$type,
$loop_scope->possibly_redefined_loop_parent_vars[$var]
);
} else {
$loop_scope->possibly_redefined_loop_parent_vars[$var] = $type;
}
}
}
if ($loop_scope->iteration_count === 0) {
foreach ($context->vars_in_scope as $var_id => $type) {
if (!isset($loop_scope->loop_parent_context->vars_in_scope[$var_id])) {
if (isset($loop_scope->possibly_defined_loop_parent_vars[$var_id])) {
$loop_scope->possibly_defined_loop_parent_vars[$var_id] = Type::combineUnionTypes(
$type,
$loop_scope->possibly_defined_loop_parent_vars[$var_id]
);
} else {
$loop_scope->possibly_defined_loop_parent_vars[$var_id] = $type;
}
}
}
}
if ($context->collect_references && (!$context->case_scope || $stmt->num)) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($loop_scope->unreferenced_vars[$var_id])) {
$loop_scope->unreferenced_vars[$var_id] += $locations;
} else {
$loop_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
}
$case_scope = $context->case_scope;
if ($case_scope) {
foreach ($context->vars_in_scope as $var_id => $type) {
if ($case_scope->parent_context !== $context) {
if ($case_scope->break_vars === null) {
$case_scope->break_vars = [];
}
if (isset($case_scope->break_vars[$var_id])) {
$case_scope->break_vars[$var_id] = Type::combineUnionTypes(
$type,
$case_scope->break_vars[$var_id]
);
} else {
$case_scope->break_vars[$var_id] = $type;
}
}
}
if ($context->collect_references) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($case_scope->unreferenced_vars[$var_id])) {
$case_scope->unreferenced_vars[$var_id] += $locations;
} else {
$case_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
}
$has_returned = true;
} elseif ($stmt instanceof PhpParser\Node\Stmt\Continue_) {
$loop_scope = $context->loop_scope;
if ($loop_scope === null) {
if (!$context->inside_case) {
if (IssueBuffer::accepts(
new ContinueOutsideLoop(
'Continue call outside loop context',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
}
} elseif ($original_context) {
if ($context->inside_case && !$stmt->num) {
$loop_scope->final_actions[] = ScopeAnalyzer::ACTION_LEAVE_SWITCH;
} else {
$loop_scope->final_actions[] = ScopeAnalyzer::ACTION_CONTINUE;
}
$redefined_vars = $context->getRedefinedVars($original_context->vars_in_scope);
if ($loop_scope->redefined_loop_vars === null) {
$loop_scope->redefined_loop_vars = $redefined_vars;
} else {
foreach ($loop_scope->redefined_loop_vars as $redefined_var => $type) {
if (!isset($redefined_vars[$redefined_var])) {
unset($loop_scope->redefined_loop_vars[$redefined_var]);
} else {
$loop_scope->redefined_loop_vars[$redefined_var] = Type::combineUnionTypes(
$redefined_vars[$redefined_var],
$type
);
}
}
}
foreach ($redefined_vars as $var => $type) {
if ($type->hasMixed()) {
$loop_scope->possibly_redefined_loop_vars[$var] = $type;
} elseif (isset($loop_scope->possibly_redefined_loop_vars[$var])) {
$loop_scope->possibly_redefined_loop_vars[$var] = Type::combineUnionTypes(
$type,
$loop_scope->possibly_redefined_loop_vars[$var]
);
} else {
$loop_scope->possibly_redefined_loop_vars[$var] = $type;
}
}
if ($context->collect_references && (!$context->case_scope || $stmt->num)) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($loop_scope->unreferenced_vars[$var_id])) {
$loop_scope->unreferenced_vars[$var_id] += $locations;
} else {
$loop_scope->unreferenced_vars[$var_id] = $locations;
}
if (isset($loop_scope->possibly_unreferenced_vars[$var_id])) {
$loop_scope->possibly_unreferenced_vars[$var_id] += $locations;
} else {
$loop_scope->possibly_unreferenced_vars[$var_id] = $locations;
}
}
}
}
$case_scope = $context->case_scope;
if ($case_scope && $context->collect_references) {
foreach ($context->unreferenced_vars as $var_id => $locations) {
if (isset($case_scope->unreferenced_vars[$var_id])) {
$case_scope->unreferenced_vars[$var_id] += $locations;
} else {
$case_scope->unreferenced_vars[$var_id] = $locations;
}
}
}
$has_returned = true;
} elseif ($stmt instanceof PhpParser\Node\Stmt\Static_) {
$this->analyzeStatic($stmt, $context);
} elseif ($stmt instanceof PhpParser\Node\Stmt\Echo_) {
$echo_param = new FunctionLikeParameter(
'var',
false
);
$echo_param->sink = Type\Union::TAINTED_INPUT_HTML
| Type\Union::TAINTED_USER_SECRET
| Type\Union::TAINTED_SYSTEM_SECRET;
foreach ($stmt->exprs as $i => $expr) {
$context->inside_call = true;
ExpressionAnalyzer::analyze($this, $expr, $context);
$context->inside_call = false;
if (isset($expr->inferredType)) {
if (CallAnalyzer::checkFunctionArgumentType(
$this,
$expr->inferredType,
Type::getString(),
null,
'echo',
(int)$i,
new CodeLocation($this->getSource(), $expr),
$expr,
$context,
$echo_param,
false,
false,
true,
new CodeLocation($this->source, $stmt)
) === false) {
return false;
}
}
}
if ($codebase->config->forbid_echo) {
if (IssueBuffer::accepts(
new ForbiddenEcho(
'Use of echo',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
return false;
}
} elseif (isset($codebase->config->forbidden_functions['echo'])) {
if (IssueBuffer::accepts(
new ForbiddenCode(
'Use of echo',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
// continue
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Function_) {
foreach ($stmt->stmts as $function_stmt) {
if ($function_stmt instanceof PhpParser\Node\Stmt\Global_) {
foreach ($function_stmt->vars as $var) {
if ($var instanceof PhpParser\Node\Expr\Variable) {
if (is_string($var->name)) {
$var_id = '$' . $var->name;
// registers variable in global context
$context->hasVariable($var_id, $this);
}
}
}
} elseif (!$function_stmt instanceof PhpParser\Node\Stmt\Nop) {
break;
}
}
if (!$codebase->register_stub_files
&& !$codebase->register_autoload_files
) {
$function_id = strtolower($stmt->name->name);
$function_context = new Context($context->self);
$function_context->strict_types = $context->strict_types;
$config = Config::getInstance();
$function_context->collect_references = $codebase->collect_references;
$function_context->collect_exceptions = $config->check_for_throws_docblock;
if (isset($this->function_analyzers[$function_id])) {
$this->function_analyzers[$function_id]->analyze($function_context, $context);
if ($config->reportIssueInFile('InvalidReturnType', $this->getFilePath())) {
$method_id = $this->function_analyzers[$function_id]->getMethodId();
$function_storage = $codebase->functions->getStorage(
$this,
$method_id
);
$return_type = $function_storage->return_type;
$return_type_location = $function_storage->return_type_location;
$this->function_analyzers[$function_id]->verifyReturnType(
$this,
$return_type,
$this->getFQCLN(),
$return_type_location
);
}
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression) {
if (ExpressionAnalyzer::analyze($this, $stmt->expr, $context, false, $global_context) === false) {
return false;
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\InlineHTML) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Global_) {
if (!$context->collect_initializations && !$global_context) {
if (IssueBuffer::accepts(
new InvalidGlobal(
'Cannot use global scope here',
new CodeLocation($this->source, $stmt)
),
$this->source->getSuppressedIssues()
)) {
// fall through
}
}
$source = $this->getSource();
$function_storage = $source instanceof FunctionLikeAnalyzer
? $source->getFunctionLikeStorage($this)
: null;
foreach ($stmt->vars as $var) {
if ($var instanceof PhpParser\Node\Expr\Variable) {
if (is_string($var->name)) {
$var_id = '$' . $var->name;
if ($var->name === 'argv' || $var->name === 'argc') {
$context->vars_in_scope[$var_id] = $this->getGlobalType($var_id);
} elseif (isset($function_storage->global_types[$var_id])) {
$context->vars_in_scope[$var_id] = clone $function_storage->global_types[$var_id];
$context->vars_possibly_in_scope[$var_id] = true;
} else {
$context->vars_in_scope[$var_id] =
$global_context && $global_context->hasVariable($var_id, $this)
? clone $global_context->vars_in_scope[$var_id]
: $this->getGlobalType($var_id);
$context->vars_possibly_in_scope[$var_id] = true;
}
}
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Property) {
foreach ($stmt->props as $prop) {
if ($prop->default) {
ExpressionAnalyzer::analyze($this, $prop->default, $context);
if (isset($prop->default->inferredType)) {
if (PropertyAssignmentAnalyzer::analyzeInstance(
$this,
$prop,
$prop->name->name,
$prop->default,
$prop->default->inferredType,
$context
) === false) {
// fall through
}
}
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\ClassConst) {
$const_visibility = \ReflectionProperty::IS_PUBLIC;
if ($stmt->isProtected()) {
$const_visibility = \ReflectionProperty::IS_PROTECTED;
}
if ($stmt->isPrivate()) {
$const_visibility = \ReflectionProperty::IS_PRIVATE;
}
foreach ($stmt->consts as $const) {
ExpressionAnalyzer::analyze($this, $const->value, $context);
if (isset($const->value->inferredType) && !$const->value->inferredType->hasMixed()) {
$codebase->classlikes->setConstantType(
(string)$this->getFQCLN(),
$const->name->name,
$const->value->inferredType,
$const_visibility
);
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Class_) {
try {
$class_analyzer = new ClassAnalyzer($stmt, $this->source, $stmt->name ? $stmt->name->name : null);
$class_analyzer->analyze(null, $global_context);
} catch (\InvalidArgumentException $e) {
// disregard this exception, we'll likely see it elsewhere in the form
// of an issue
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Nop) {
if (($doc_comment = $stmt->getDocComment()) && $this->parsed_docblock) {
$var_comments = [];
try {
$var_comments = CommentAnalyzer::arrayToDocblocks(
$doc_comment,
$this->parsed_docblock,
$this->getSource(),
$this->getSource()->getAliases(),
$this->getSource()->getTemplateTypeMap()
);
} catch (DocblockParseException $e) {
if (IssueBuffer::accepts(
new InvalidDocblock(
(string)$e->getMessage(),
new CodeLocation($this->getSource(), $stmt, null, true)
)
)) {
// fall through
}
}
foreach ($var_comments as $var_comment) {
if (!$var_comment->var_id || !$var_comment->type) {
continue;
}
$comment_type = ExpressionAnalyzer::fleshOutType(
$codebase,
$var_comment->type,
$context->self,
$context->self,
$this->getParentFQCLN()
);
$context->vars_in_scope[$var_comment->var_id] = $comment_type;
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\Goto_) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Label) {
// do nothing
} elseif ($stmt instanceof PhpParser\Node\Stmt\Declare_) {
foreach ($stmt->declares as $declaration) {
if ((string) $declaration->key === 'strict_types'
&& $declaration->value instanceof PhpParser\Node\Scalar\LNumber
&& $declaration->value->value === 1
) {
$context->strict_types = true;
}
}
} elseif ($stmt instanceof PhpParser\Node\Stmt\HaltCompiler) {
$has_returned = true;
} else {
if (IssueBuffer::accepts(
new UnrecognizedStatement(
'Psalm does not understand ' . get_class($stmt),
new CodeLocation($this->source, $stmt)
),
$this->getSuppressedIssues()
)) {
return false;
}
}
if ($context->loop_scope
&& $context->loop_scope->final_actions
&& !in_array(ScopeAnalyzer::ACTION_NONE, $context->loop_scope->final_actions, true)
) {
//$has_returned = true;
}
if ($plugin_classes) {
$file_manipulations = [];
foreach ($plugin_classes as $plugin_fq_class_name) {
if ($plugin_fq_class_name::afterStatementAnalysis(
$stmt,
$context,
$this->getSource(),
$codebase,
$file_manipulations
) === false) {
return false;
}
}
if ($file_manipulations) {
FileManipulationBuffer::add($this->getFilePath(), $file_manipulations);
}
}
if ($new_issues) {
$this->removeSuppressedIssues($new_issues);
}
if ($ignore_variable_property) {
$context->ignore_variable_property = false;
}
if ($ignore_variable_method) {
$context->ignore_variable_method = false;
}
}
if ($root_scope
&& $context->collect_references
&& !$context->collect_initializations
&& $codebase->find_unused_variables
&& $context->check_variables
) {
$this->checkUnreferencedVars($stmts);
}
if ($codebase->alter_code && $root_scope && $this->vars_to_initialize) {
$file_contents = $codebase->getFileContents($this->getFilePath());
foreach ($this->vars_to_initialize as $var_id => $branch_point) {
$newline_pos = (int)strrpos($file_contents, "\n", $branch_point - strlen($file_contents)) + 1;
$indentation = substr($file_contents, $newline_pos, $branch_point - $newline_pos);
FileManipulationBuffer::add($this->getFilePath(), [
new FileManipulation($branch_point, $branch_point, $var_id . ' = null;' . "\n" . $indentation),
]);
}
}
return null;
}
/**
* @param CodeLocation $var_loc
* @param int $end_bound
* @param bool $assign_ref
* @return FileManipulation
*/
private function getPartialRemovalBounds(
CodeLocation $var_loc,
int $end_bound,
bool $assign_ref = false
): FileManipulation {
$var_start_loc= $var_loc->raw_file_start;
$stmt_content = $this->getSource()->getCodebase()->file_provider->getContents($var_loc->file_path);
$str_for_token = "<?php\n" . substr($stmt_content, $var_start_loc, $end_bound - $var_start_loc + 1);
$token_list = array_slice(token_get_all($str_for_token), 1); //Ignore "<?php"
$offset_count = strlen($token_list[0][1]);
$iter = 1;
// Check if second token is just whitespace
if (is_array($token_list[$iter]) && strlen(trim($token_list[$iter][1])) == 0) {
$offset_count += strlen($token_list[1][1]);
$iter++;
}
// Add offset for assignment operator
if (is_string($token_list[$iter])) {
$offset_count += 1;
} else {
$offset_count += strlen($token_list[$iter][1]);
}
$iter++;
// Remove any whitespace following assignment operator token (e.g "=", "+=")
if (is_array($token_list[$iter]) && strlen(trim($token_list[$iter][1])) == 0) {
$offset_count += strlen($token_list[$iter][1]);
$iter++;
}
// If we are dealing with assignment by reference, we need to handle "&" and any whitespace after
if ($assign_ref) {
$offset_count += 1;
$iter++;
// Handle any whitespace after "&"
if (is_array($token_list[$iter]) && strlen(trim($token_list[$iter][1])) == 0) {
$offset_count += strlen($token_list[$iter][1]);
}
}
$file_man_start = $var_start_loc;
$file_man_end = $var_start_loc + $offset_count;
return new FileManipulation($file_man_start, $file_man_end, "", false);
}
/**
* @param PhpParser\Node\Expr\Assign|PhpParser\Node\Expr\AssignOp|PhpParser\Node\Expr\AssignRef $cur_assign
* @param array<string, CodeLocation> $var_loc_map
* @return void
*/
private function markRemovedChainAssignVar(PhpParser\Node\Expr $cur_assign, array $var_loc_map): void
{
$var = $cur_assign->var;
if ($var instanceof PhpParser\Node\Expr\Variable && is_string($var->name)) {
$var_name = "$" . $var->name;
$var_loc = $var_loc_map[$var_name];
$this->removed_unref_vars[$var_name] = $var_loc;
$rhs_exp = $cur_assign->expr;
if ($rhs_exp instanceof PhpParser\Node\Expr\Assign
|| $rhs_exp instanceof PhpParser\Node\Expr\AssignOp
|| $rhs_exp instanceof PhpParser\Node\Expr\AssignRef
) {
$this->markRemovedChainAssignVar($rhs_exp, $var_loc_map);
}
}
}
/**
* @param PhpParser\Node\Expr\Assign|PhpParser\Node\Expr\AssignOp|PhpParser\Node\Expr\AssignRef $cur_assign
* @param array<string, CodeLocation> $var_loc_map
* @return bool
*/
private function checkRemovableChainAssignment(PhpParser\Node\Expr $cur_assign, array $var_loc_map): bool
{
// Check if current assignment expr's variable is removable
$var = $cur_assign->var;
if ($var instanceof PhpParser\Node\Expr\Variable && is_string($var->name)) {
$var_loc = $cur_assign->var->getStartFilePos();
$var_name = "$" . $var->name;
if (array_key_exists($var_name, $var_loc_map) &&
$var_loc_map[$var_name]->raw_file_start === $var_loc) {
$curr_removable = true;
} else {
$curr_removable = false;
}
if ($curr_removable) {
$rhs_exp = $cur_assign->expr;
if ($rhs_exp instanceof PhpParser\Node\Expr\Assign
|| $rhs_exp instanceof PhpParser\Node\Expr\AssignOp
|| $rhs_exp instanceof PhpParser\Node\Expr\AssignRef
) {
$rhs_removable = $this->checkRemovableChainAssignment($rhs_exp, $var_loc_map);
return $rhs_removable;
}
}
return $curr_removable;
} else {
return false;
}
}
/**
* @param array<PhpParser\Node\Stmt> $stmts
* @param string $var_id
* @param CodeLocation $original_location
* @return array{
* 0: PhpParser\Node\Stmt|null,
* 1: PhpParser\Node\Expr\Assign|PhpParser\Node\Expr\AssignOp|PhpParser\Node\Expr\AssignRef|null
* }
*/