说所有函数有点夸张，有错误请指正！
usleep() unpack() uniqid() time_sleep_until() time_nanosleep() sleep() show_source() strip_whitespace() pack() ignore_user_abort() highlight_string() highlight_file() get_browser() exit() eval() die() defined() define() constant() connection_status() connection_aborted() zip_read() zip_open() zip_entry_read() zip_entry_open() zip_entry_name() zip_entry_filesize() zip_entry_compressionmethod() zip_entry_compressedsize() zip_entry_close() zip_close() xml_set_unparsed_entity_decl_handler() xml_set_processing_instruction_handler() xml_set_object() xml_set_notation_decl_handler() xml_set_external_entity_ref_handler() xml_set_element_handler() xml_set_default_handler() xml_set_character_data_handler() xml_parser_set_option() xml_parser_get_option() xml_parser_free() xml_parser_create() xml_parser_create_ns() xml_parse_into_struct() xml_parse() xml_get_error_code() xml_get_current_line_number() xml_get_current_column_number() xml_get_current_byte_index() xml_error_string() utf8_encode() utf8_decode() wordwrap() vsprintf() vprintf() vfprintf() ucwords() ucfirst() trim() substr_replace() substr_count() substr_compare() substr() strtr() strtoupper() strtolower() strtok() strstr() strspn() strrpos() strripos() strrev() strrchr() strpos() strpbrk() strncmp() strncasecmp() strnatcmp() strnatcasecmp() strlen() stristr() stripos() stripslashes() stripcslashes() strip_tags() strcspn() strcoll() strcmp() strchr() strcasecmp() str_word_count() str_split() str_shuffle() str_rot13() str_replace() str_repeat() str_pad() str_ireplace() sscanf() sprintf() soundex() similar_text() sha1_file() sha1() setlocale() rtrim() quotemeta() quoted_printable_decode() printf() print() parse_str() ord() number_format() nl2br() nl_langinfo() money_format() metaphone() md5_file() md5() ltrim() localeconv() levenshtein() join() implode() htmlspecialchars() html_entity_decode() htmlentities() hebrevc() hebrev() get_html_translation_table() fprintf() explode() echo() crypt() crc32() count_chars() convert_uuencode() convert_uudecode() convert_cyr_string() chunk_split() chr() chop() bin2hex() addslashes() addcslashes() xpath() simplexml_load_string() simplexml_load_file() simplexml_import_dom() registerXPathNamespace() getNamespace() getName() getDocNamespaces() children() attributes() asXML() addChild() addAttribute() __construct() mysql_unbuffered_query() mysql_thread_id() mysql_stat() mysql_select_db() mysql_result() mysql_real_escape_string() mysql_query() mysql_ping() mysql_pconnect() mysql_num_rows() mysql_num_fields() mysql_list_processes() mysql_list_dbs() mysql_insert_id() mysql_info() mysql_get_server_info() mysql_get_proto_info() mysql_get_host_info() mysql_get_client_info() mysql_free_result() mysql_field_type() mysql_field_table() mysql_field_seek() mysql_field_name() mysql_field_len() mysql_field_flags() mysql_fetch_row() mysql_fetch_object() mysql_fetch_lengths() mysql_fetch_field() mysql_fetch_assoc() mysql_fetch_array() mysql_error() mysql_errno() mysql_db_name() mysql_data_seek() mysql_connect() mysql_close() mysql_client_encoding() mysql_affected_rows() tanh() tan() srand() sqrt() sinh() sin() round() rand() rad2deg() pow() pi() octdec() mt_srand() mt_rand() mt_getrandmax() min() max() log1p() log10() log() lcg_value() is_nan() is_infinite() is_finite() hypot() hexdec() fmod() floor() expm1() exp() deg2rad() decoct() dechex() decbin() cosh() cos() ceil() bindec() base_convert() atanh() atan() atan2() asinh() asin() acosh() acos() abs() mail() libxml_use_internal_errors() libxml_get_last_error() libxml_get_errors() libxml_clear_errors() setrawcookie() setcookie() headers_sent() headers_list() header() ftp_systype() ftp_ssl_connect() ftp_size() ftp_site() ftp_set_option() ftp_rmdir() ftp_rename() ftp_rawlist() ftp_raw() ftp_quit() ftp_pwd() ftp_put() ftp_pasv() ftp_nlist() ftp_nb_put() ftp_nb_get() ftp_nb_fput() ftp_nb_fget() ftp_nb_continue() ftp_mkdir() ftp_mdtm() ftp_login() ftp_get() ftp_get_option() ftp_fput() ftp_fget() ftp_exec() ftp_delete() ftp_connect() ftp_close() ftp_chmod() ftp_chdir() ftp_cdup() ftp_alloc() filter_var() filter_var_array() filter_list() filter_input_array() filter_input() filter_id() filter_has_var() unlink() umask() touch() tmpfile() tempnam() symlink() stat() set_file_buffer() rmdir() rewind() rename() realpath() readlink() readfile() popen() pclose() pathinfo() parse_ini_file() move_uploaded_file() mkdir() lstat() linkinfo() link() is_writeable() is_writable() is_uploaded_file() is_readable() is_link() is_file() is_executable() is_dir() glob() fwrite() ftruncate() ftell() fstat() fseek() fscanf() fread() fputs() fputcsv() fpassthru() fopen() fnmatch() flock() filetype() filesize() fileperms() fileowner() filemtime() fileinode() filegroup() filectime() fileatime() file_put_contents() file_get_contents() file_exists() file() fgetss() fgets() fgetcsv() fgetc() fflush() feof() fclose() diskfreespace() disk_total_space() disk_free_space() dirname() clearstatcache() chown() chmod() chgrp() basename() set_exception_handler() set_error_handler() restore_exception_handler() restore_error_handler() error_reporting() error_log() error_get_last() debug_print_backtrace() debug_backtrace() scandir() rewinddir() readdir() opendir() getcwd() closedir() dir() chroot() chdir() time() strtotime() strptime() strftime() mktime() microtime() localtime() idate() gmstrftime() gmmktime() gmdate() gettimeofday() getdate() date() date_sunset() date_sunrise() date_default_timezone_set() date_default_timezone_get() checkdate() UnixToJD() JulianToJD() JewishToJD() JDToUnix() JDToGregorian() lian() JDToFrench() JDMonthName() JDDayOfWeek() GregorianToJD() FrenchToJD() easter_days() easter_date() cal_to_jd() cal_info() cal_from_jd() cal_days_in_month() usort() uksort() uasort() sort() sizeof() shuffle() rsort() reset() range() prev() pos() next() natsort() natcasesort() list() ksort() krsort() key() in_array() extract() end() each() current() count() compact() asort() arsort() array_walk_recursive() array_walk() array_values() array_unshift() array_unique() array_uintersect_assoc() array_uintersect() array_udiff_uassoc() array_udiff_assoc() array_udiff() array_sum() array_splice() array_slice() array_shift() array_search() array_reverse() array_reduce() array_rand() array_push() array_product() array_pop() array_pad() array_multisort() array_merge_recursive() array_merge() array_map() array_keys() array_key_exists() array_intersect_ukey() array_intersect_uassoc() array_intersect_key() array_intersect_assoc() array_intersect() array_flip() array_filter() array_fill() array_diff_ukey() array_diff_uassoc() array_diff_key() array_diff_assoc() array_diff() array_count_values() array_combine() array_chunk() array_change_key_case() include_once() and() abstract() global() private() interface() as() static() endswitch() array() null() if() endwhile() or() const() for() endforeach() self() var() while() isset() public() protected() foreach() throw() elseif() include() FILE() empty() require_once() do() xor() return() parent() clone() use() CLASS() LINE() else() break() new() catch() METHOD() case() exception() default() require() FUNCTION() enddeclare() final() try() switch() continue() endfor() endif() declare() unset() TRUE() FALSE() trait() goto() instanceof() insteadof() DIR() NAMESPACE() yield() finally() ini_set() set_time_limit() intval() session_start() memory_get_usage() var_dump() flush() ob_clean() ob_end_clean() ob_end_flush() ob_flush() ob_get_clean() ob_get_contents() ob_get_flush() ob_get_length() ob_get_level() ob_get_status() ob_gzhandler() ob_implicit_flush() ob_list_handlers() ob_start() output_add_rewrite_var() output_reset_rewrite_vars()