array_all() | (mixed $array, mixed $callback): bool | bool |
array_any() | (mixed $array, mixed $callback): bool | bool |
array_chunk() | (array $array, int $length): array | array |
array_column() | (array $array, string $column_key): array | array |
array_combine() | (array $keys, array $values): array | array |
array_diff() | (array $array, ...$arrays): array | array |
array_diff_assoc() | (array $array, ...$arrays): mixed | mixed |
array_diff_key() | (array $array, ...$arrays): array | array |
array_fill() | (int $start_index, int $count, mixed $value): array | array |
array_fill_keys() | (array $keys, mixed $value): array | array |
array_filter() | (array $array, callable $callback = null, int $mode = 0): array | array |
array_find() | (mixed $array, mixed $callback): mixed | mixed |
array_flip() | (array $array): array | array |
array_intersect() | (array $array, ...$arrays): array | array |
array_intersect_assoc() | (array $array, ...$arrays): mixed | mixed |
array_intersect_key() | (array $array, ...$arrays): array | array |
array_is_list() | (mixed $array): bool | bool |
array_key_exists() | (string $key, array $array): bool | bool |
array_key_first() | (array $array): mixed | mixed |
array_key_last() | (array $array): mixed | mixed |
array_keys() | (array $array): array | array |
array_map() | (callable $callback, array $array, ...$arrays): array | array |
array_merge() | (...$arrays): array | array |
array_merge_recursive() | (...$arrays): array | array |
array_multisort() | (array $array1, int $array2): bool | bool |
array_pad() | (array $array, int $length, mixed $value): array | array |
array_pop() | (array $array): mixed | mixed |
array_product() | (array $array): int | int |
array_push() | (array $array, ...$values): void | void |
array_rand() | (array $array): int | int |
array_reduce() | (array $array, callable $callback, mixed $initial = null): int | int |
array_replace() | (array $array, array $replacements): mixed | mixed |
array_replace_recursive() | (array $array, array $replacements): mixed | mixed |
array_reverse() | (array $array): array | array |
array_search() | (mixed $needle, array $haystack, bool $strict = false): mixed | mixed |
array_shift() | (array $array): mixed | mixed |
array_slice() | (array $array, int $offset, int $length = null): array | array |
array_splice() | (array $array, int $offset, int $length = null): array | array |
array_sum() | (array $array): int | int |
array_udiff() | (array $array1, array $array2, callable $callback): array | array |
array_uintersect() | (array $array1, array $array2, callable $callback): array | array |
array_unique() | (array $array): array | array |
array_unshift() | (array $array, ...$values): int | int |
array_values() | (array $array): array | array |
array_walk() | (array $array, callable $callback): void | void |
array_walk_recursive() | (array $array, callable $callback): void | void |
arsort() | (array $array): bool | bool |
asort() | (array $array): bool | bool |
call_user_func() | (callable $callback, ...$args): mixed | mixed |
call_user_func_array() | (callable $callback, array $args): mixed | mixed |
count() | (array $value, int $mode = 0): int | int |
in_array() | (mixed $needle, array $haystack, bool $strict = false): bool | bool |
krsort() | (array $array): bool | bool |
ksort() | (array $array): bool | bool |
natcasesort() | (array $array): bool | bool |
natsort() | (array $array): bool | bool |
range() | (mixed $start, mixed $end): array | array |
rsort() | (array $array): bool | bool |
shuffle() | (array $array): bool | bool |
sort() | (array $array): bool | bool |
uasort() | (array $array, callable $callback): bool | bool |
uksort() | (array $array, callable $callback): bool | bool |
usort() | (array $array, callable $callback): bool | bool |
buffer_free() | (buffer $buffer): mixed | mixed |
buffer_len() | (buffer $buffer): int | int |
class_alias() | (string $class, string $alias, bool $autoload = true): bool | bool |
class_attribute_args() | (string $class_name, string $attribute_name): array | array |
class_attribute_names() | (string $class_name): array | array |
class_exists() | (string $class, bool $autoload = true): bool | bool |
class_get_attributes() | (string $class_name): array | array |
class_implements() | (mixed $object_or_class, bool $autoload = true): mixed | mixed |
class_parents() | (mixed $object_or_class, bool $autoload = true): mixed | mixed |
class_uses() | (mixed $object_or_class, bool $autoload = true): mixed | mixed |
enum_exists() | (string $enum, bool $autoload = true): bool | bool |
function_exists() | (string $function): bool | bool |
get_class() | (object $object = null): string | string |
get_declared_classes() | (): array | array |
get_declared_interfaces() | (): array | array |
get_declared_traits() | (): array | array |
get_parent_class() | (mixed $object_or_class = null): string | string |
interface_exists() | (string $interface, bool $autoload = true): bool | bool |
is_a() | (object $object_or_class, string $class, bool $allow_string = false): bool | bool |
is_subclass_of() | (mixed $object_or_class, string $class, bool $allow_string = true): bool | bool |
trait_exists() | (string $trait, bool $autoload = true): bool | bool |
checkdate() | (int $month, int $day, int $year): bool | bool |
date() | (string $format, int $timestamp = null): string | string |
date_default_timezone_get() | (): string | string |
date_default_timezone_set() | (string $timezoneId): bool | bool |
getdate() | (int $timestamp = null): array | array |
gmdate() | (string $format, int $timestamp = null): string | string |
gmmktime() | (int $hour, int $minute, int $second, int $month, int $day, int $year): int | int |
hrtime() | (bool $as_number = false): mixed | mixed |
localtime() | (int $timestamp = -1, bool $associative = false): array | array |
microtime() | (bool $as_float = false): mixed | mixed |
mktime() | (int $hour, int $minute, int $second, int $month, int $day, int $year): int | int |
strtotime() | (string $datetime, int $baseTimestamp = null): mixed | mixed |
time() | (): int | int |
basename() | (string $path, string $suffix = ''): string | string |
chdir() | (string $directory): bool | bool |
chgrp() | (string $filename, string $group): bool | bool |
chmod() | (string $filename, int $permissions): bool | bool |
chown() | (string $filename, string $user): bool | bool |
clearstatcache() | (bool $clear_realpath_cache = false, string $filename = ''): void | void |
copy() | (string $from, string $to): bool | bool |
dirname() | (string $path, int $levels = 1): string | string |
disk_free_space() | (string $directory): float | float |
disk_total_space() | (string $directory): float | float |
file_exists() | (string $filename): bool | bool |
fileatime() | (string $filename): mixed | mixed |
filectime() | (string $filename): mixed | mixed |
filegroup() | (string $filename): mixed | mixed |
fileinode() | (string $filename): mixed | mixed |
filemtime() | (string $filename): int | int |
fileowner() | (string $filename): mixed | mixed |
fileperms() | (string $filename): mixed | mixed |
filesize() | (string $filename): int | int |
filetype() | (string $filename): mixed | mixed |
fnmatch() | (string $pattern, string $filename, int $flags = 0): bool | bool |
getcwd() | (): string | string |
getenv() | (string $name): mixed | mixed |
glob() | (string $pattern): array | array |
is_dir() | (string $filename): bool | bool |
is_executable() | (string $filename): bool | bool |
is_file() | (string $filename): bool | bool |
is_link() | (string $filename): bool | bool |
is_readable() | (string $filename): bool | bool |
is_writable() | (string $filename): bool | bool |
is_writeable() | (string $filename): bool | bool |
lchgrp() | (string $filename, string $group): bool | bool |
lchown() | (string $filename, string $user): bool | bool |
link() | (string $target, string $link): bool | bool |
linkinfo() | (string $path): int | int |
lstat() | (string $filename): mixed | mixed |
mkdir() | (string $directory): bool | bool |
pathinfo() | (string $path, int $flags = 15): array | array |
putenv() | (string $assignment): bool | bool |
readfile() | (string $filename): mixed | mixed |
readlink() | (string $path): mixed | mixed |
realpath() | (string $path): mixed | mixed |
realpath_cache_get() | (): array | array |
realpath_cache_size() | (): int | int |
rename() | (string $from, string $to): bool | bool |
rmdir() | (string $directory): bool | bool |
scandir() | (string $directory): array | array |
stat() | (string $filename): mixed | mixed |
symlink() | (string $target, string $link): bool | bool |
sys_get_temp_dir() | (): string | string |
tempnam() | (string $directory, string $prefix): string | string |
tmpfile() | (): mixed | mixed |
touch() | (string $filename, int $mtime = null, int $atime = null): bool | bool |
umask() | (int $mask = null): int | int |
unlink() | (string $filename): bool | bool |
closedir() | (resource $dir_handle): void | void |
fclose() | (resource $stream): bool | bool |
fdatasync() | (resource $stream): bool | bool |
feof() | (resource $stream): bool | bool |
fflush() | (resource $stream): bool | bool |
fgetc() | (resource $stream): mixed | mixed |
fgetcsv() | (resource $stream, int $length = null, string $separator = ','): array | array |
fgets() | (resource $stream): mixed | mixed |
file() | (string $filename): array | array |
file_get_contents() | (string $filename): mixed | mixed |
file_put_contents() | (string $filename, string $data): int | int |
flock() | (resource $stream, int $operation, bool $would_block = null): bool | bool |
fopen() | (string $filename, string $mode, bool $use_include_path = false, mixed $context = null): mixed | mixed |
fpassthru() | (resource $stream): int | int |
fprintf() | (resource $stream, string $format, ...$values): int | int |
fputcsv() | (resource $stream, array $fields, string $separator = ',', string $enclosure = '"'): int | int |
fread() | (resource $stream, int $length): string | string |
fscanf() | (resource $stream, string $format, ...$vars): array | array |
fseek() | (resource $stream, int $offset, int $whence = 0): int | int |
fstat() | (resource $stream): mixed | mixed |
fsync() | (resource $stream): bool | bool |
ftell() | (resource $stream): int | int |
ftruncate() | (resource $stream, int $size): bool | bool |
fwrite() | (resource $stream, string $data): int | int |
gethostbyaddr() | (string $ip): mixed | mixed |
gethostbyname() | (string $hostname): string | string |
gethostname() | (): string | string |
getprotobyname() | (string $protocol): mixed | mixed |
getprotobynumber() | (int $protocol): mixed | mixed |
getservbyname() | (string $service, string $protocol): mixed | mixed |
getservbyport() | (int $port, string $protocol): mixed | mixed |
hash_file() | (string $algo, string $filename, bool $binary = false): mixed | mixed |
opendir() | (string $directory): mixed | mixed |
readdir() | (resource $dir_handle): mixed | mixed |
rewind() | (resource $stream): bool | bool |
rewinddir() | (resource $dir_handle): void | void |
stream_bucket_make_writeable() | (mixed $brigade): mixed | mixed |
stream_bucket_new() | (resource $stream, string $buffer): mixed | mixed |
stream_context_create() | (array $options = null, array $params = null): mixed | mixed |
stream_context_get_default() | (array $options = null): mixed | mixed |
stream_context_get_options() | (resource $context): array | array |
stream_context_get_params() | (resource $context): array | array |
stream_context_set_default() | (array $options): mixed | mixed |
stream_context_set_option() | (resource $context, string $wrapper_or_options, string $option_name = null, mixed $value = null): bool | bool |
stream_context_set_params() | (resource $context, array $params): bool | bool |
stream_copy_to_stream() | (resource $from, resource $to, int $length = null, int $offset = -1): mixed | mixed |
stream_filter_register() | (string $filter_name, string $class): bool | bool |
stream_filter_remove() | (resource $stream_filter): bool | bool |
stream_get_contents() | (resource $stream, int $length = null, int $offset = -1): mixed | mixed |
stream_get_filters() | (): array | array |
stream_get_line() | (resource $stream, int $length, string $ending = ''): string | string |
stream_get_meta_data() | (resource $stream): array | array |
stream_get_transports() | (): array | array |
stream_get_wrappers() | (): array | array |
stream_is_local() | (resource $stream): bool | bool |
stream_isatty() | (resource $stream): bool | bool |
stream_resolve_include_path() | (string $filename): mixed | mixed |
stream_select() | (array $read, array $write, array $except, int $seconds, int $microseconds = 0): int | int |
stream_set_blocking() | (resource $stream, bool $enable): bool | bool |
stream_set_chunk_size() | (resource $stream, int $size): int | int |
stream_set_read_buffer() | (resource $stream, int $size): int | int |
stream_set_timeout() | (resource $stream, int $seconds, int $microseconds = 0): bool | bool |
stream_set_write_buffer() | (resource $stream, int $size): int | int |
stream_socket_accept() | (resource $socket, float $timeout = null, string $peer_name = null): mixed | mixed |
stream_socket_client() | (string $address): mixed | mixed |
stream_socket_enable_crypto() | (resource $stream, bool $enable, int $crypto_method = null, resource $session_stream = null): bool | bool |
stream_socket_get_name() | (resource $socket, bool $remote): mixed | mixed |
stream_socket_pair() | (int $domain, int $type, int $protocol): mixed | mixed |
stream_socket_recvfrom() | (resource $socket, int $length, int $flags = 0, string $address = ''): mixed | mixed |
stream_socket_sendto() | (resource $socket, string $data, int $flags = 0, string $address = ''): mixed | mixed |
stream_socket_server() | (string $address): mixed | mixed |
stream_socket_shutdown() | (resource $stream, int $mode): bool | bool |
stream_supports_lock() | (resource $stream): bool | bool |
stream_wrapper_register() | (string $protocol, string $class, int $flags = 0): bool | bool |
stream_wrapper_restore() | (string $protocol): bool | bool |
stream_wrapper_unregister() | (string $protocol): bool | bool |
vfprintf() | (resource $stream, string $format, array $values): int | int |
json_decode() | (string $json, bool $associative = null, int $depth = 512, int $flags = 0): mixed | mixed |
json_encode() | (mixed $value, int $flags = 0, int $depth = 512): string | string |
json_last_error() | (): int | int |
json_last_error_msg() | (): string | string |
json_validate() | (string $json, int $depth = 512, int $flags = 0): bool | bool |
abs() | (int $num): mixed | mixed |
acos() | (float $num): float | float |
asin() | (float $num): float | float |
atan() | (float $num): float | float |
atan2() | (float $y, float $x): float | float |
ceil() | (float $num): float | float |
clamp() | (int $value, int $min, int $max): mixed | mixed |
cos() | (float $num): float | float |
cosh() | (float $num): float | float |
deg2rad() | (float $num): float | float |
exp() | (float $num): float | float |
fdiv() | (float $num1, float $num2): float | float |
floor() | (float $num): float | float |
fmod() | (float $num1, float $num2): float | float |
hypot() | (float $x, float $y): float | float |
intdiv() | (int $num1, int $num2): int | int |
is_finite() | (float $num): bool | bool |
is_infinite() | (float $num): bool | bool |
is_nan() | (float $num): bool | bool |
log() | (float $num, float $base = 2.718281828459045): float | float |
log10() | (float $num): float | float |
log2() | (float $num): float | float |
max() | (mixed $value, ...$values): mixed | mixed |
min() | (mixed $value, ...$values): mixed | mixed |
mt_rand() | (int $min, int $max): int | int |
pi() | (): float | float |
pow() | (float $num, float $exponent): float | float |
rad2deg() | (float $num): float | float |
rand() | (int $min, int $max): int | int |
random_int() | (int $min, int $max): int | int |
round() | (float $num, int $precision = 0): float | float |
sin() | (float $num): float | float |
sinh() | (float $num): float | float |
sqrt() | (float $num): float | float |
tan() | (float $num): float | float |
tanh() | (float $num): float | float |
buffer_new() | (int $length): mixed | mixed |
define() | (string $constant_name, mixed $value): bool | bool |
defined() | (string $constant_name): bool | bool |
empty() | (mixed $value): bool | bool |
header() | (string $header, bool $replace = true, int $response_code = 0): void | void |
http_response_code() | (int $response_code = 0): int | int |
isset() | (mixed $var, ...$vars): bool | bool |
php_uname() | (string $mode = 'a'): string | string |
phpversion() | (): string | string |
print_r() | (mixed $value, bool $return = false): mixed | mixed |
serialize() | (mixed $value): string | string |
unserialize() | (string $data, mixed $options = []): mixed | mixed |
unset() | (mixed $var, ...$vars): void | void |
var_dump() | (mixed $value, ...$values): void | void |
ptr() | (mixed $value): mixed | mixed |
ptr_get() | (pointer $pointer): int | int |
ptr_is_null() | (pointer $pointer): bool | bool |
ptr_null() | (): mixed | mixed |
ptr_offset() | (pointer $pointer, int $offset): mixed | mixed |
ptr_read16() | (pointer $pointer): int | int |
ptr_read32() | (pointer $pointer): int | int |
ptr_read8() | (pointer $pointer): int | int |
ptr_read_string() | (pointer $pointer, int $length): string | string |
ptr_set() | (pointer $pointer, mixed $value): void | void |
ptr_sizeof() | (string $type): int | int |
ptr_write16() | (pointer $pointer, int $value): void | void |
ptr_write32() | (pointer $pointer, int $value): void | void |
ptr_write8() | (pointer $pointer, int $value): void | void |
ptr_write_string() | (pointer $pointer, string $string): int | int |
zval_free() | (pointer $zval): void | void |
zval_pack() | (mixed $value): pointer | pointer |
zval_type() | (pointer $zval): int | int |
zval_unpack() | (pointer $zval): mixed | mixed |
die() | (int $status): void | void |
exec() | (string $command): string | string |
exit() | (int $status): void | void |
passthru() | (string $command): void | void |
pclose() | (resource $handle): int | int |
popen() | (string $command, string $mode): mixed | mixed |
readline() | (string $prompt = null): mixed | mixed |
shell_exec() | (string $command): string | string |
sleep() | (int $seconds): int | int |
system() | (string $command): string | string |
usleep() | (int $microseconds): void | void |
mb_ereg_match() | (string $pattern, string $subject, string $options = null): bool | bool |
preg_match() | (string $pattern, string $subject, array $matches = []): int | int |
preg_match_all() | (string $pattern, string $subject): int | int |
preg_replace() | (string $pattern, string $replacement, string $subject): string | string |
preg_replace_callback() | (string $pattern, callable $callback, string $subject): string | string |
preg_split() | (string $pattern, string $subject, int $limit = -1, int $flags = 0): array | array |
iterator_apply() | (traversable $iterator, callable $callback, array $args = null): int | int |
iterator_count() | (traversable $iterator): int | int |
iterator_to_array() | (traversable $iterator, bool $preserve_keys = true): array | array |
spl_autoload() | (string $class, string $file_extensions = null): void | void |
spl_autoload_call() | (string $class): void | void |
spl_autoload_extensions() | (string $file_extensions = null): string | string |
spl_autoload_functions() | (): array | array |
spl_autoload_register() | (callable $callback = null, bool $throw = true, bool $prepend = false): bool | bool |
spl_autoload_unregister() | (callable $callback): bool | bool |
spl_classes() | (): array | array |
spl_object_hash() | (object $object): string | string |
spl_object_id() | (object $object): int | int |
fsockopen() | (string $hostname, int $port, int $error_code = null, string $error_message = null, float $timeout = null): mixed | mixed |
pfsockopen() | (string $hostname, int $port, int $error_code = null, string $error_message = null, float $timeout = null): mixed | mixed |
stream_bucket_append() | (mixed $brigade, mixed $bucket): void | void |
stream_bucket_prepend() | (mixed $brigade, mixed $bucket): void | void |
stream_filter_append() | (resource $stream, string $filtername, int $read_write = 3, mixed $params = null): mixed | mixed |
stream_filter_prepend() | (resource $stream, string $filtername, int $read_write = 3, mixed $params = null): mixed | mixed |
addslashes() | (string $string): string | string |
base64_decode() | (string $string): string | string |
base64_encode() | (string $string): string | string |
bin2hex() | (string $string): string | string |
chop() | (string $string, string $characters = ' \n\r\t\x0b\x0c\x00'): string | string |
chr() | (int $codepoint): string | string |
crc32() | (string $string): int | int |
explode() | (string $separator, string $string, int $limit = PHP_INT_MAX): array | array |
grapheme_strrev() | (string $string): mixed | mixed |
gzcompress() | (string $data, int $level = -1): string | string |
gzdeflate() | (string $data, int $level = -1): string | string |
gzinflate() | (string $data, int $max_length = 0): mixed | mixed |
gzuncompress() | (string $data, int $max_length = 0): mixed | mixed |
hash() | (string $algo, string $data, bool $binary = false): string | string |
hash_algos() | (): array | array |
hash_copy() | (resource $context): mixed | mixed |
hash_equals() | (string $known_string, string $user_string): bool | bool |
hash_final() | (resource $context, bool $binary = false): string | string |
hash_hmac() | (string $algo, string $data, string $key, bool $binary = false): string | string |
hash_init() | (string $algo, int $flags = 0, string $key = ''): mixed | mixed |
hash_update() | (resource $context, string $data): bool | bool |
hex2bin() | (string $string): string | string |
html_entity_decode() | (string $string): string | string |
htmlentities() | (string $string, int $flags = 11, string $encoding = 'UTF-8'): string | string |
htmlspecialchars() | (string $string, int $flags = 11, string $encoding = 'UTF-8'): string | string |
implode() | (string $separator, array $array = null): string | string |
inet_ntop() | (string $ip): mixed | mixed |
inet_pton() | (string $ip): mixed | mixed |
ip2long() | (string $ip): mixed | mixed |
lcfirst() | (string $string): string | string |
long2ip() | (int $ip): string | string |
ltrim() | (string $string, string $characters = ' \n\r\t\x0b\x0c\x00'): string | string |
md5() | (string $string, bool $binary = false): string | string |
nl2br() | (string $string): string | string |
number_format() | (float $num, int $decimals = 0, string $decimal_separator = '.', string $thousands_separator = ','): string | string |
ord() | (string $character): int | int |
printf() | (string $format, ...$values): int | int |
rawurldecode() | (string $string): string | string |
rawurlencode() | (string $string): string | string |
rtrim() | (string $string, string $characters = ' \n\r\t\x0b\x0c\x00'): string | string |
sha1() | (string $string, bool $binary = false): string | string |
sprintf() | (string $format, ...$values): string | string |
sscanf() | (string $string, string $format, ...$vars): array | array |
str_contains() | (string $haystack, string $needle): bool | bool |
str_ends_with() | (string $haystack, string $needle): bool | bool |
str_ireplace() | (string $search, string $replace, string $subject, int $count = null): string | string |
str_pad() | (string $string, int $length, string $pad_string = ' ', int $pad_type = 1): string | string |
str_repeat() | (string $string, int $times): string | string |
str_replace() | (string $search, string $replace, string $subject, int $count = null): string | string |
str_split() | (string $string, int $length = 1): array | array |
str_starts_with() | (string $haystack, string $needle): bool | bool |
strcasecmp() | (string $string1, string $string2): int | int |
strcmp() | (string $string1, string $string2): int | int |
stripslashes() | (string $string): string | string |
strlen() | (string $string): int | int |
strpos() | (string $haystack, string $needle, int $offset = 0): mixed | mixed |
strrev() | (string $string): string | string |
strrpos() | (string $haystack, string $needle, int $offset = 0): mixed | mixed |
strstr() | (string $haystack, string $needle, bool $before_needle = false): string | string |
strtolower() | (string $string): string | string |
strtoupper() | (string $string): string | string |
substr() | (string $string, int $offset, int $length = null): string | string |
substr_replace() | (string $string, string $replace, int $offset, int $length = null): string | string |
trim() | (string $string, string $characters = ' \n\r\t\x0b\x0c\x00'): string | string |
ucfirst() | (string $string): string | string |
ucwords() | (string $string, string $separators = ' \t\r\n\x0c\x0b'): string | string |
urldecode() | (string $string): string | string |
urlencode() | (string $string): string | string |
vprintf() | (string $format, array $values): int | int |
vsprintf() | (string $format, array $values): string | string |
wordwrap() | (string $string, int $width = 75, string $break = '\n', bool $cut_long_words = false): string | string |
boolval() | (mixed $value): bool | bool |
ctype_alnum() | (string $text): bool | bool |
ctype_alpha() | (string $text): bool | bool |
ctype_digit() | (string $text): bool | bool |
ctype_space() | (string $text): bool | bool |
floatval() | (mixed $value): float | float |
get_resource_id() | (resource $resource): int | int |
get_resource_type() | (resource $resource): string | string |
gettype() | (mixed $value): string | string |
intval() | (mixed $value): int | int |
is_array() | (mixed $value): bool | bool |
is_bool() | (mixed $value): bool | bool |
is_callable() | (mixed $value): bool | bool |
is_float() | (mixed $value): bool | bool |
is_int() | (mixed $value): bool | bool |
is_iterable() | (mixed $value): bool | bool |
is_null() | (mixed $value): bool | bool |
is_numeric() | (mixed $value): bool | bool |
is_object() | (mixed $value): bool | bool |
is_resource() | (mixed $value): bool | bool |
is_scalar() | (mixed $value): bool | bool |
is_string() | (mixed $value): bool | bool |
settype() | (mixed $var, string $type): bool | bool |