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Unit 4: Functions

Classes and objects Notes
call_user_method, call_user_method_array, class_exists, get_class, get_class_methods, get_class_
vars, get_declared_classes,get_object_vars, get_parent_class, is_subclass_of, method_exists
Date and time
checkdate, date, getdate, gettimeofday, gmdate, gmmktime, gmstrftime, localtime, microtime,
mktime, strftime, strtotime, time
Errors and logging

assert , assert_options, closelog, crc32, define_syslog_variables, error_log, error_reporting, openlog,
restore_error_handler,set_error_handler, syslog, trigger_error, user_error
Files, directories, and filesystem

basename, chdir, chgrp, chmod, chown, chroot, clearstatcache, closedir, copy, dirname,
disk_free_space, disk_total_space, fclose, feof,fflush, fgetc, fgetcsv, fgets, fgetss, file, file_exists,
fileatime, filectime, filegroup, fileinode, filemtime, fileowner, fileperms,filesize, filetype, flock,
fopen, fpassthru, fputs, fread, fscanf, fseek, fstat, ftell, ftruncate, fwrite, getcwd, getlastmod,
is_dir,is_executable, is_file, is_link, is_readable, is_uploaded_file, is_writable, is_writeable, link,
linkinfo, lstat, mkdir,move_uploaded_file, opendir, pathinfo, pclose, readdir, readfile, readlink,
realpath, rename, rewind, rewinddir, rmdir, set_file_buffer,stat, symlink, tempnam, tmpfile,
touch, umask, unlink
Functions
call_user_func, call_user_func_array, create_function, func_get_arg, func_get_args, func_num_
args, function_exists,get_defined_functions, get_extension_funcs, get_loaded_extensions,
register_shutdown_function, register_tick_function,unregister_tick_function
HTTP
get_browser, get_meta_tags, header, headers_sent, parse_str, parse_url, rawurldecode,
rawurlencode, setcookie
Mail
mail

Math
abs , acos, asin, atan, atan2, base_convert, bindec, ceil, cos, decbin, dechex, decoct, deg2rad, exp,
floor, getrandmax, hexdec, lcg_value, log,log10, max, min, mt_getrandmax, mt_rand, mt_srand,
number_format, octdec, pi, pow, rad2deg, rand, round, sin, sqrt, srand, tan
Network

checkdnsrr, fsockopen, gethostbyaddr, gethostbyname, gethostbynamel, getmxrr, getprotobyname,
getprotobynumber, getservbyname,getservbyport, ip2long, long2ip, pfsockopen, socket_get_
status, socket_set_blocking, socket_set_timeout
Output control
flush , ob_end_clean, ob_end_flush, ob_get_contents, ob_get_length, ob_gzhandler, ob_implicit_
flush, ob_start
PHP options/info

assert, assert_options, dl, extension_loaded, get_cfg_var, get_current_user, get_extension_funcs,
get_included_files,get_loaded_extensions, get_magic_quotes_gpc, get_required_files, getenv,
getlastmod, getmyinode, getmypid, getrusage, highlight_file,highlight_string, ini_alter,

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