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/
ArgumentsAnalyzer.php
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/
ArgumentsAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer\Statements\Expression\Call;
use PhpParser;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Context;
use Psalm\Internal\Analyzer\AttributesAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\AssignmentAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\CallAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\ExpressionIdentifier;
use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ArrayFetchAnalyzer;
use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Codebase\ConstantTypeResolver;
use Psalm\Internal\Codebase\Functions;
use Psalm\Internal\Codebase\InternalCallMapHandler;
use Psalm\Internal\Codebase\TaintFlowGraph;
use Psalm\Internal\DataFlow\TaintSink;
use Psalm\Internal\MethodIdentifier;
use Psalm\Internal\Stubs\Generator\StubsGenerator;
use Psalm\Internal\Type\Comparator\UnionTypeComparator;
use Psalm\Internal\Type\TemplateInferredTypeReplacer;
use Psalm\Internal\Type\TemplateResult;
use Psalm\Internal\Type\TemplateStandinTypeReplacer;
use Psalm\Internal\Type\TypeExpander;
use Psalm\Issue\InvalidNamedArgument;
use Psalm\Issue\InvalidPassByReference;
use Psalm\Issue\PossiblyUndefinedVariable;
use Psalm\Issue\TooFewArguments;
use Psalm\Issue\TooManyArguments;
use Psalm\IssueBuffer;
use Psalm\Node\VirtualArg;
use Psalm\Storage\ClassLikeStorage;
use Psalm\Storage\FunctionLikeParameter;
use Psalm\Storage\FunctionLikeStorage;
use Psalm\Storage\MethodStorage;
use Psalm\Type;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TCallable;
use Psalm\Type\Atomic\TCallableArray;
use Psalm\Type\Atomic\TCallableKeyedArray;
use Psalm\Type\Atomic\TClosure;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TList;
use Psalm\Type\Atomic\TLiteralString;
use Psalm\Type\Atomic\TNonEmptyArray;
use Psalm\Type\Atomic\TTemplateParam;
use Psalm\Type\Union;
use UnexpectedValueException;
use function array_map;
use function array_reverse;
use function array_slice;
use function array_values;
use function count;
use function in_array;
use function is_string;
use function max;
use function min;
use function reset;
use function strpos;
use function strtolower;
/**
* @internal
*/
class ArgumentsAnalyzer
{
/**
* @param list<PhpParser\Node\Arg> $args
* @param array<int, FunctionLikeParameter>|null $function_params
* @return false|null
*/
public static function analyze(
StatementsAnalyzer $statements_analyzer,
array $args,
?array $function_params,
?string $method_id,
bool $allow_named_args,
Context $context,
?TemplateResult $template_result = null
): ?bool {
$last_param = $function_params
? $function_params[count($function_params) - 1]
: null;
// if this modifies the array type based on further args
if (in_array($method_id, ['array_push', 'array_unshift'], true)
&& $function_params
&& isset($args[0])
&& isset($args[1])
) {
if (ArrayFunctionArgumentsAnalyzer::handleAddition(
$statements_analyzer,
$args,
$context,
$method_id,
) === false
) {
return false;
}
return null;
}
if ($method_id === 'array_splice' && $function_params && count($args) > 1) {
if (ArrayFunctionArgumentsAnalyzer::handleSplice($statements_analyzer, $args, $context) === false) {
return false;
}
return null;
}
if ($method_id === 'array_map') {
$args = array_reverse($args, true);
}
foreach ($args as $argument_offset => $arg) {
if ($function_params === null) {
if (self::evaluateArbitraryParam(
$statements_analyzer,
$arg,
$context,
) === false) {
return false;
}
continue;
}
$param = null;
if ($arg->name && $allow_named_args) {
foreach ($function_params as $candidate_param) {
if ($candidate_param->name === $arg->name->name) {
$param = $candidate_param;
break;
}
}
if ($last_param && $last_param->is_variadic) {
$param = $last_param;
}
} elseif ($argument_offset < count($function_params)) {
$param = $function_params[$argument_offset];
} elseif ($last_param && $last_param->is_variadic) {
$param = $last_param;
}
$by_ref = $param && $param->by_ref;
$by_ref_type = null;
if ($by_ref) {
$by_ref_type = $param->type ?: Type::getMixed();
}
if ($by_ref
&& $by_ref_type
&& !($arg->value instanceof PhpParser\Node\Expr\Closure
|| $arg->value instanceof PhpParser\Node\Expr\ConstFetch
|| $arg->value instanceof PhpParser\Node\Expr\ClassConstFetch
|| $arg->value instanceof PhpParser\Node\Expr\FuncCall
|| $arg->value instanceof PhpParser\Node\Expr\MethodCall
|| $arg->value instanceof PhpParser\Node\Expr\StaticCall
|| $arg->value instanceof PhpParser\Node\Expr\New_
|| $arg->value instanceof PhpParser\Node\Expr\Assign
|| $arg->value instanceof PhpParser\Node\Expr\Array_
|| $arg->value instanceof PhpParser\Node\Expr\Ternary
|| $arg->value instanceof PhpParser\Node\Expr\BinaryOp
)
) {
if (self::handleByRefFunctionArg(
$statements_analyzer,
$method_id,
$argument_offset,
$arg,
$context,
) === false) {
return false;
}
continue;
}
$toggled_class_exists = false;
if ($method_id === 'class_exists'
&& $argument_offset === 0
&& !$context->inside_class_exists
) {
$context->inside_class_exists = true;
$toggled_class_exists = true;
}
if (($arg->value instanceof PhpParser\Node\Expr\Closure
|| $arg->value instanceof PhpParser\Node\Expr\ArrowFunction)
&& $param
&& !$arg->value->getDocComment()
) {
self::handleClosureArg(
$statements_analyzer,
$args,
$method_id,
$context,
$template_result ?? new TemplateResult([], []),
$argument_offset,
$arg,
$param,
);
}
$was_inside_call = $context->inside_call;
$context->inside_call = true;
if (ExpressionAnalyzer::analyze($statements_analyzer, $arg->value, $context) === false) {
$context->inside_call = $was_inside_call;
return false;
}
$context->inside_call = $was_inside_call;
if (($argument_offset === 0 && $method_id === 'array_filter' && count($args) === 2)
|| ($argument_offset > 0 && $method_id === 'array_map' && count($args) >= 2)
) {
self::handleArrayMapFilterArrayArg(
$statements_analyzer,
$method_id,
$argument_offset,
$arg,
$context,
$template_result,
);
}
$inferred_arg_type = $statements_analyzer->node_data->getType($arg->value);
if (null !== $inferred_arg_type
&& null !== $template_result
&& null !== $param
&& null !== $param->type
&& !$arg->unpack
) {
$codebase = $statements_analyzer->getCodebase();
TemplateStandinTypeReplacer::fillTemplateResult(
$param->type,
$template_result,
$codebase,
$statements_analyzer,
$inferred_arg_type,
$argument_offset,
$context->self,
$context->calling_method_id ?: $context->calling_function_id,
);
}
if ($toggled_class_exists) {
$context->inside_class_exists = false;
}
}
if ($method_id === "ReflectionClass::getattributes"
|| $method_id === "ReflectionClassConstant::getattributes"
|| $method_id === "ReflectionFunction::getattributes"
|| $method_id === "ReflectionMethod::getattributes"
|| $method_id === "ReflectionParameter::getattributes"
|| $method_id === "ReflectionProperty::getattributes"
) {
AttributesAnalyzer::analyzeGetAttributes($statements_analyzer, $method_id, array_values($args));
}
return null;
}
private static function handleArrayMapFilterArrayArg(
StatementsAnalyzer $statements_analyzer,
string $method_id,
int $argument_offset,
PhpParser\Node\Arg $arg,
Context $context,
?TemplateResult &$template_result
): void {
$codebase = $statements_analyzer->getCodebase();
$template_types = ['ArrayValue' . $argument_offset => [$method_id => Type::getMixed()]];
$replace_template_result = new TemplateResult(
$template_types,
[],
);
$existing_type = $statements_analyzer->node_data->getType($arg->value);
TemplateStandinTypeReplacer::fillTemplateResult(
new Union([
new TArray([
Type::getArrayKey(),
new Union([
new TTemplateParam(
'ArrayValue' . $argument_offset,
Type::getMixed(),
$method_id,
),
]),
]),
]),
$replace_template_result,
$codebase,
$statements_analyzer,
$existing_type,
$argument_offset,
$context->self,
$context->calling_method_id ?: $context->calling_function_id,
);
if ($replace_template_result->lower_bounds) {
if (!$template_result) {
$template_result = new TemplateResult([], []);
}
$template_result->lower_bounds += $replace_template_result->lower_bounds;
}
}
/**
* @param array<int, PhpParser\Node\Arg> $args
*/
private static function handleClosureArg(
StatementsAnalyzer $statements_analyzer,
array $args,
?string $method_id,
Context $context,
TemplateResult $template_result,
int $argument_offset,
PhpParser\Node\Arg $arg,
FunctionLikeParameter $param
): void {
if (!$param->type) {
return;
}
$codebase = $statements_analyzer->getCodebase();
if (($argument_offset === 1 && $method_id === 'array_filter' && count($args) === 2)
|| ($argument_offset === 0 && $method_id === 'array_map' && count($args) >= 2)
) {
$function_like_params = [];
foreach ($template_result->lower_bounds as $template_name => $_) {
$t = new Union([
new TTemplateParam(
$template_name,
Type::getMixed(),
$method_id,
),
]);
$function_like_params[] = new FunctionLikeParameter(
'function',
false,
$t,
$t,
);
}
$replaced_type = new Union([
new TCallable(
'callable',
array_reverse($function_like_params),
),
]);
} else {
$replaced_type = $param->type;
}
$replace_template_result = new TemplateResult(
array_map(
static fn(array $template_map): array => array_map(
static fn(array $lower_bounds): Union => TemplateStandinTypeReplacer::getMostSpecificTypeFromBounds(
$lower_bounds,
$codebase,
),
$template_map,
),
$template_result->lower_bounds,
),
[],
);
$replaced_type = TemplateStandinTypeReplacer::replace(
$replaced_type,
$replace_template_result,
$codebase,
$statements_analyzer,
null,
null,
null,
$context->calling_method_id ?: $context->calling_function_id,
);
$replaced_type = TemplateInferredTypeReplacer::replace(
$replaced_type,
$replace_template_result,
$codebase,
);
$closure_id = strtolower($statements_analyzer->getFilePath())
. ':' . $arg->value->getLine()
. ':' . (int)$arg->value->getAttribute('startFilePos')
. ':-:closure';
try {
$closure_storage = $codebase->getClosureStorage(
$statements_analyzer->getFilePath(),
$closure_id,
);
} catch (UnexpectedValueException $e) {
return;
}
foreach ($closure_storage->params as $closure_param_offset => $param_storage) {
$param_type_inferred = $param_storage->type_inferred;
$newly_inferred_type = null;
$has_different_docblock_type = false;
if ($param_storage->type && !$param_type_inferred) {
if ($param_storage->type !== $param_storage->signature_type) {
$has_different_docblock_type = true;
}
}
if (!$has_different_docblock_type) {
foreach ($replaced_type->getAtomicTypes() as $replaced_type_part) {
if ($replaced_type_part instanceof TCallable
|| $replaced_type_part instanceof TClosure
) {
if (isset($replaced_type_part->params[$closure_param_offset]->type)) {
$replaced_param_type = $replaced_type_part->params[$closure_param_offset]->type;
if ($replaced_param_type->hasTemplate()) {
$replaced_param_type = TypeExpander::expandUnion(
$codebase,
$replaced_param_type,
null,
null,
null,
true,
false,
false,
true,
true,
);
}
if ($param_storage->type && !$param_type_inferred) {
$type_match_found = UnionTypeComparator::isContainedBy(
$codebase,
$replaced_param_type,
$param_storage->type,
);
if (!$type_match_found) {
continue;
}
}
$newly_inferred_type = Type::combineUnionTypes(
$newly_inferred_type,
$replaced_param_type,
$codebase,
);
}
}
}
}
if ($newly_inferred_type) {
$param_storage->type = $newly_inferred_type;
$param_storage->type_inferred = true;
}
if ($param_storage->type && ($method_id === 'array_map' || $method_id === 'array_filter')) {
$temp = Type::getMixed();
ArrayFetchAnalyzer::taintArrayFetch(
$statements_analyzer,
$args[1 - $argument_offset]->value,
null,
$param_storage->type,
$temp,
);
}
}
}
/**
* @param list<PhpParser\Node\Arg> $args
* @param string|MethodIdentifier|null $method_id
* @param array<int,FunctionLikeParameter> $function_params
* @return false|null
* @psalm-suppress ComplexMethod there's just not much that can be done about this
*/
public static function checkArgumentsMatch(
StatementsAnalyzer $statements_analyzer,
array $args,
$method_id,
array $function_params,
?FunctionLikeStorage $function_storage,
?ClassLikeStorage $class_storage,
TemplateResult $template_result,
CodeLocation $code_location,
Context $context
): ?bool {
$in_call_map = $method_id ? InternalCallMapHandler::inCallMap((string) $method_id) : false;
$cased_method_id = (string) $method_id;
$is_variadic = false;
$fq_class_name = null;
$codebase = $statements_analyzer->getCodebase();
if ($method_id) {
if ($method_id instanceof MethodIdentifier) {
$fq_class_name = $method_id->fq_class_name;
}
if ($function_storage) {
$is_variadic = $function_storage->variadic;
} elseif (is_string($method_id)) {
$is_variadic = Functions::isVariadic(
$codebase,
strtolower($method_id),
$statements_analyzer->getRootFilePath(),
);
} else {
$is_variadic = $codebase->methods->isVariadic($method_id);
}
}
if ($method_id instanceof MethodIdentifier) {
$cased_method_id = $codebase->methods->getCasedMethodId($method_id);
} elseif ($function_storage) {
$cased_method_id = $function_storage->cased_name;
}
$calling_class_storage = $class_storage;
$static_fq_class_name = $fq_class_name;
$self_fq_class_name = $fq_class_name;
if ($method_id instanceof MethodIdentifier) {
$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
if ($declaring_method_id && (string)$declaring_method_id !== (string)$method_id) {
$self_fq_class_name = $declaring_method_id->fq_class_name;
$class_storage = $codebase->classlike_storage_provider->get($self_fq_class_name);
}
$appearing_method_id = $codebase->methods->getAppearingMethodId($method_id);
if ($appearing_method_id && $declaring_method_id !== $appearing_method_id) {
$self_fq_class_name = $appearing_method_id->fq_class_name;
}
}
if ($function_params && !$is_variadic) {
foreach ($function_params as $function_param) {
$is_variadic = $is_variadic || $function_param->is_variadic;
}
}
$has_packed_var = false;
foreach ($args as $arg) {
if ($arg->unpack) {
$has_packed_var = true;
}
}
$last_param = $function_params
? $function_params[count($function_params) - 1]
: null;
$class_generic_params = [];
foreach ($template_result->lower_bounds as $template_name => $type_map) {
foreach ($type_map as $class => $lower_bounds) {
if (count($lower_bounds) === 1) {
$class_generic_params[$template_name][$class] = reset($lower_bounds)->type;
}
}
}
if ($function_storage) {
$template_result = self::getProvisionalTemplateResultForFunctionLike(
$statements_analyzer,
$codebase,
$context,
$class_storage,
$self_fq_class_name,
$calling_class_storage,
$function_storage,
$class_generic_params,
$template_result,
$args,
$function_params,
$last_param,
);
}
$function_param_count = count($function_params);
if (count($function_params) > count($args) && !$has_packed_var) {
for ($i = count($args), $iMax = count($function_params); $i < $iMax; $i++) {
if ($function_params[$i]->default_type
&& $function_params[$i]->type
&& $function_params[$i]->type->hasTemplate()
) {
if ($function_params[$i]->default_type instanceof Union) {
$default_type = $function_params[$i]->default_type;
} else {
$default_type_atomic = ConstantTypeResolver::resolve(
$codebase->classlikes,
$function_params[$i]->default_type,
$statements_analyzer,
);
$default_type = new Union([$default_type_atomic]);
}
if ($default_type->hasLiteralValue()) {
ArgumentAnalyzer::checkArgumentMatches(
$statements_analyzer,
$cased_method_id,
$method_id instanceof MethodIdentifier ? $method_id : null,
$self_fq_class_name,
$static_fq_class_name,
$code_location,
$function_params[$i],
$i,
$i,
$function_storage->allow_named_arg_calls ?? true,
new VirtualArg(
StubsGenerator::getExpressionFromType($default_type),
),
$default_type,
$context,
$class_generic_params,
$template_result,
$function_storage->specialize_call ?? true,
$in_call_map,
);
}
}
}
}
if (($method_id === 'preg_match_all' || $method_id === 'preg_match') && count($args) > 3) {
$args = array_reverse($args, true);
}
$arg_function_params = [];
$matched_args = [];
$named_args_was_used = false;
foreach ($args as $argument_offset => $arg) {
if ($named_args_was_used && !$arg->name) {
IssueBuffer::maybeAdd(
new InvalidNamedArgument(
'Cannot use positional argument after named argument',
new CodeLocation($statements_analyzer, $arg),
(string)$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
if ($arg->unpack) {
if ($function_param_count > $argument_offset) {
for ($i = $argument_offset; $i < $function_param_count; $i++) {
$arg_function_params[$argument_offset][] = $function_params[$i];
}
}
if (($arg_value_type = $statements_analyzer->node_data->getType($arg->value))
&& $arg_value_type->hasArray()) {
/**
* @var TArray|TKeyedArray
*/
$array_type = $arg_value_type->getArray();
if ($array_type instanceof TKeyedArray) {
$array_type = $array_type->getGenericArrayType();
$key_types = $array_type->type_params[0]->getAtomicTypes();
foreach ($key_types as $key_type) {
if (!$key_type instanceof TLiteralString
|| ($function_storage && !$function_storage->allow_named_arg_calls)) {
continue;
}
$param_found = false;
foreach ($function_params as $candidate_param) {
if ($candidate_param->name === $key_type->value || $candidate_param->is_variadic) {
if ($candidate_param->name === $key_type->value) {
if (isset($matched_args[$candidate_param->name])) {
IssueBuffer::maybeAdd(
new InvalidNamedArgument(
'Parameter $' . $key_type->value . ' has already been used in '
. ($cased_method_id ?: $method_id),
new CodeLocation($statements_analyzer, $arg),
(string)$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
$matched_args[$candidate_param->name] = true;
}
$param_found = true;
break;
}
}
if (!$param_found) {
IssueBuffer::maybeAdd(
new InvalidNamedArgument(
'Parameter $' . $key_type->value . ' does not exist on function '
. ($cased_method_id ?: $method_id),
new CodeLocation($statements_analyzer, $arg),
(string)$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
}
}
}
} elseif ($arg->name && (!$function_storage || $function_storage->allow_named_arg_calls)) {
$named_args_was_used = true;
foreach ($function_params as $candidate_param) {
if ($candidate_param->name === $arg->name->name || $candidate_param->is_variadic) {
if ($candidate_param->name === $arg->name->name) {
if (isset($matched_args[$candidate_param->name])) {
IssueBuffer::maybeAdd(
new InvalidNamedArgument(
'Parameter $' . $arg->name->name . ' has already been used in '
. ($cased_method_id ?: $method_id),
new CodeLocation($statements_analyzer, $arg->name),
(string) $method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
$matched_args[$candidate_param->name] = true;
}
$arg_function_params[$argument_offset] = [$candidate_param];
break;
}
}
if (!isset($arg_function_params[$argument_offset])) {
IssueBuffer::maybeAdd(
new InvalidNamedArgument(
'Parameter $' . $arg->name->name . ' does not exist on function '
. ($cased_method_id ?: $method_id),
new CodeLocation($statements_analyzer, $arg->name),
(string) $method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
} elseif ($function_param_count > $argument_offset) {
$arg_function_params[$argument_offset] = [$function_params[$argument_offset]];
$matched_args[$function_params[$argument_offset]->name] = true;
} elseif ($last_param && $last_param->is_variadic) {
$arg_function_params[$argument_offset] = [$last_param];
$matched_args[$last_param->name] = true;
}
}
foreach ($args as $argument_offset => $arg) {
if (!isset($arg_function_params[$argument_offset])) {
continue;
}
if ($arg_function_params[$argument_offset][0]->by_ref
&& $method_id !== 'extract'
) {
if (self::handlePossiblyMatchingByRefParam(
$statements_analyzer,
$codebase,
(string) $method_id,
$cased_method_id,
$last_param,
$function_params,
$argument_offset,
$arg,
$context,
$template_result,
) === false) {
return null;
}
}
$arg_value_type = $statements_analyzer->node_data->getType($arg->value);
foreach ($arg_function_params[$argument_offset] as $i => $function_param) {
if (ArgumentAnalyzer::checkArgumentMatches(
$statements_analyzer,
$cased_method_id,
$method_id instanceof MethodIdentifier ? $method_id : null,
$self_fq_class_name,
$static_fq_class_name,
$code_location,
$function_param,
$argument_offset + $i,
$i,
$function_storage->allow_named_arg_calls ?? true,
$arg,
$arg_value_type,
$context,
$class_generic_params,
$template_result,
$function_storage->specialize_call ?? true,
$in_call_map,
) === false) {
return false;
}
}
}
if ($statements_analyzer->data_flow_graph instanceof TaintFlowGraph
&& $cased_method_id
) {
foreach ($args as $argument_offset => $_) {
if (!isset($arg_function_params[$argument_offset])) {
continue;
}
foreach ($arg_function_params[$argument_offset] as $function_param) {
if ($function_param->sinks) {
if (!$function_storage || $function_storage->specialize_call) {
$sink = TaintSink::getForMethodArgument(
$cased_method_id,
$cased_method_id,
$argument_offset,
$function_param->location,
$code_location,
);
} else {
$sink = TaintSink::getForMethodArgument(
$cased_method_id,
$cased_method_id,
$argument_offset,
$function_param->location,
);
}
$sink->taints = $function_param->sinks;
$statements_analyzer->data_flow_graph->addSink($sink);
}
}
}
}
if ($method_id === 'array_map' || $method_id === 'array_filter') {
if ($method_id === 'array_map' && count($args) < 2) {
IssueBuffer::maybeAdd(
new TooFewArguments(
'Too few arguments for ' . $method_id,
$code_location,
$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
} elseif ($method_id === 'array_filter' && count($args) < 1) {
IssueBuffer::maybeAdd(
new TooFewArguments(
'Too few arguments for ' . $method_id,
$code_location,
$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
}
ArrayFunctionArgumentsAnalyzer::checkArgumentsMatch(
$statements_analyzer,
$context,
$args,
$method_id,
$context->check_functions,
);
return null;
}
if ($method_id === 'get_class' && $args === []) {
//get_class without args only works when inside a class
if (!$context->self) {
IssueBuffer::maybeAdd(
new TooFewArguments(
'Cannot call get_class() without argument outside of class scope',
$code_location,
$method_id,
),
$statements_analyzer->getSuppressedIssues(),
);
return null;
}
}
self::checkArgCount(
$statements_analyzer,
$codebase,
$function_storage,
$context,
$template_result,
$is_variadic,
$args,
$function_params,
$in_call_map,
$method_id,
$cased_method_id,
$code_location,
);
return null;
}
/**
* @param array<int, FunctionLikeParameter> $function_params
* @return false|null
*/
private static function handlePossiblyMatchingByRefParam(
StatementsAnalyzer $statements_analyzer,
Codebase $codebase,
string $method_id,
?string $cased_method_id,
?FunctionLikeParameter $last_param,
array $function_params,
int $argument_offset,
PhpParser\Node\Arg $arg,
Context $context,
?TemplateResult $template_result
): ?bool {
if ($arg->value instanceof PhpParser\Node\Scalar
|| $arg->value instanceof PhpParser\Node\Expr\Cast
|| $arg->value instanceof PhpParser\Node\Expr\Array_
|| $arg->value instanceof PhpParser\Node\Expr\ClassConstFetch
|| $arg->value instanceof PhpParser\Node\Expr\BinaryOp
|| $arg->value instanceof PhpParser\Node\Expr\Ternary
|| (
(
$arg->value instanceof PhpParser\Node\Expr\ConstFetch
|| $arg->value instanceof PhpParser\Node\Expr\FuncCall
|| $arg->value instanceof PhpParser\Node\Expr\MethodCall
|| $arg->value instanceof PhpParser\Node\Expr\StaticCall
) && (
!($arg_value_type = $statements_analyzer->node_data->getType($arg->value))
|| !$arg_value_type->by_ref
)
)
) {
IssueBuffer::maybeAdd(
new InvalidPassByReference(
'Parameter ' . ($argument_offset + 1) . ' of ' . $cased_method_id . ' expects a variable',
new CodeLocation($statements_analyzer->getSource(), $arg->value),
),
$statements_analyzer->getSuppressedIssues(),
);
return false;
}
if (!in_array(
$method_id,
[
'ksort', 'asort', 'krsort', 'arsort', 'natcasesort', 'natsort',
'reset', 'end', 'next', 'prev', 'array_pop', 'array_shift',
'array_push', 'array_unshift', 'socket_select', 'array_splice',
],
true,
)) {
$by_ref_type = null;
$by_ref_out_type = null;