Server Side Programming Articles - Page 2355 of 2650

The pathlib module provides an object oriented approach to handling filesystem paths. The module also provides functionality appropriate for various operating systems. Classes defined in this module are of two types – pure path types and concrete path types. While pure paths can only perform purely computational operations, concrete paths are capable of doing I/O operations too.pathlib module defines following classes −Sr.No.Module & Description1PurePathThe base class for all other classes2Pathsubclassed from PurePath. This is a concrete class that represents filesystem path.3PosixPathPath subclass for non-Windows OS4WindowsPathPath subclass for Windows systems5PurePosixPathPurePath subclass for non-Windows systems6PureWindowsPathPurePath subclass for Windows systemsWhen instance of Path ... Read More

Python Object Persistence  The shelve module in Python's standard library is a simple yet effective tool for persistent data storage when using a relational database solution is not required. The shelf object defined in this module is a dictionary-like object persistently stored in a disk file. This creates a file similar to dbm database on UNIX-like systems. The only string data type can be used as a key in this special dictionary object, whereas any pickable object can serve as value. The shelve module defines three classes as follows − ... Read More

The usleep() function delays execution of the current script for few microseconds.Syntaxusleep(msec)Parametersmsec − The number of microseconds to delay the script.ReturnThe usleep() function returns nothing.Example Live DemoOutputThe following is the output.03:06:08 03:06:10 03:06:15

The unpack() function unpacks data from a binary string.Syntaxunpack(format, data)Parametersformat − The format to use. Here are the possible valuesa −NUL-padded stringA − SPACE-padded stringh − Hex string, low nibble firstH − Hex string, high nibble firstc − signed charC −unsigned chars − signed short (always 16 bit, machine byte order)S − unsigned short (always 16 bit, machine byte order)n − unsigned short (always 16 bit, big endian byte order)v − unsigned short (always 16 bit, little endian byte order)i − signed integer (machine dependent size and byte order)I − unsigned integer (machine dependent size and byte order)l − signed ... Read More

The uniqid() function generates a unique ID based on the current time in microseconds.Syntaxuniqid(prefix, more_entropy)Parametersprefix − The prefix to the unique ID.more_entropy − The more entropy at the end of the return value.ReturnThe uniqid() function returns unique identifiers as string.Example Live DemoOutputThe following is the output.5bfd5bd045faa

The time_sleep_until() function delays execution of the current script until the specified time. Syntax time_sleep_until(time) Parameters time − The time until execution will delay. Return The time_sleep_until() function returns true on success. Example The execution of the above script is now delayed for 15 seconds.

The time_nanosleep() function delays execution of the current script for few seconds and nanoseconds.Syntaxtime_nanosleep(sec, nsec)Parameterssec − The number of seconds to delay the script.nsec − The number of nanoseconds to delay the script.ReturnThe time_nanosleep() function returns true on success.Example Live DemoOutputThe following is the output.02:57:04 02:57:06 02:57:08

The sleep() function delays execution of the current script for short time period.Syntaxsleep(sec)Parameterssec− The number of seconds to delay the script.ReturnThe sleep() function returns zero on success.Example Live DemoOutputThe following is the output.02:54:50 02:54:52 02:54:57

The show_source() function outputs a file with the PHP syntax highlighted.Syntaxshow_source(file, return)Parametersfile − The file name to display.return − If this parameter is set to true, this function will return the highlighted code as a string, instead of printing it out. Default is false.ReturnThe show_source() function returns the highlighted code as a string instead of printing it, if the return parameter is set to true otherwise, it returns true on success, or false on failure.ExampleThe following is an example, wherein we are using a test file ("new.php") to output the file with the PHP syntax highlighted.         ... Read More

The php_strip_whitespace() function returns source with stripped comments and whitespace. Syntax php_strip_whitespace(file_path) Parameters file_path − The path of file. Return The php_strip_whitespace() function returns stripped source code on success. Example The above code strip all the comments and whitespace.