PHP Developer’s Dictionary IT-SC book 515 The gzfile() function, which operates like readgzfile() except that it returns an array, returns the contents of a gz_file . If the optional include_path is set to 1 , PHP will look for the gz_file in the include_path , as specified by the php.ini file. gzgetc() Syntax string gzgetc(int gz_pointer) Description The gzgetc() function returns a single, uncompressed character from the file pointed to by gz_pointer . If the file is at the end (EOF), FALSE is returned. gzgets() Syntax string gzgets(int gz_pointer , int length ) Description The gzgets() function returns a single, uncompressed line from the file pointed to by gz_pointer . It stops when it hits a newline character or the end of file (EOF) marker. If the EOF is hit, FALSE is returned. gzgetss() Syntax string gzgetss(int gz_pointer, int length [, string allowable_tags]) Description The gzgetss() function returns uncompressed length number of characters from gz_pointer , and removes any HTML or PHP tags. After PHP 3.0.13, an optional allowable_tags parameter has been added to specify HTML or PHP tags that you want to leave in. If the EOF is hit, FALSE is returned. gzopen() PHP Developer’s Dictionary IT-SC book 516 Syntax int gzopen(string gz_file, string mode [, int include_path]) Description The gzopen() function attempts to open gz_file and return a file pointer for later operations. If you have include_path set to 1 , PHP will look for the gz_file in the include_path specified in the php.ini file. The mode parameter tells the function how to open the file. This can be any of the items listed in Table 11.11 . Table 11.11. Various Modes in Which a gz File Can Be Opened Mode Description r Read w Write 1–9 Compression level f Filtered data (strategy) h Huffman only compression gzpassthru() Syntax int gzpassthru (int gz_pointer) Description The gzpassthru() function returns all remaining data located at the gz_pointer that has not been retrieved. This stops only at the end of file (EOF) marker. gzputs() Syntax int gzputs(int gz_pointer, string string [, int length]) Description The gzputs() function is an alias to the gzwrite() function, where it writes string until length to the file located at gz_pointer . Note PHP Developer’s Dictionary IT-SC book 517 If the optional length argument is passed, the magic_quotes_runtime configuration option in the php.ini file is ignored. gzread() Syntax string gzread(int gz_pointer, int length) Description The gzread() function reads and returns until length is reached in the uncompressed gz_pointer file. gzrewind() Syntax int gzrewind (int gz_pointer) Description The gzrewind() function resets gz_pointer to the beginning of the gz file. If an error occurs, 0 is returned. gzseek() Syntax int gzseek(int gz_pointer, int offset) Description The gzseek() function sets the current pointer inside the gz file to offset bytes from its current location. Do note that if the file is opened for reading only, this operation can be very slow. Additionally, if the file is opened for writing, you can seek only in a forward direction. PHP Developer’s Dictionary IT-SC book 518 gztell() Syntax int gztell(int gz_pointer ) Description The gztell() function returns the current position of the internal pointer to the gz_pointer file. gzuncompress() Syntax string gzuncompress(string data [, int level]) Description The gzuncompress() function, which was added in PHP 4.0.1, takes the data compressed by the gzcompress() function and returns up to length of that data in an uncompressed format. gzwrite() Syntax int gzwrite(int gz_pointer, string string [, int length]) Description The gzwrite() function is the same as the gzputs() function; it writes string up to length to the file located at gz_pointer . Note If the optional length argument is passed, the magic_quotes_runtime configuration option in the php.ini file will be ignored. PHP Developer’s Dictionary IT-SC book 519 readgzfile() Syntax int readgzfile(string gz_file [, int include_path ]) Description The readgzfile() function reads gz_file , decompresses it, and sends it to standard output (STDOUT). If you specify include_path to equal to 1, PHP looks for gz_file in the include_path directory, which is set in the php.ini file. Date and Time The date and time functions within PHP enable you to obtain and format time and date stamps for your scripts. There are also functions that enable you to validate specific styles of time formats. checkdate() Syntax int checkdate(int month, int date, int year) Description The checkdate() function validates the Gregorian date/time passed, which is represented by the month, date , and year parameters. If the date is valid, 1 is returned. Do note that the following rules apply to these parameters: • month —Must be between 1 and 12 . • date —Must be within the allowed number of days for the given month. Leap years are taken into consideration. • year —Must be between 1 and 32767 . date() Syntax string date(string format [, int time_stamp]) . or PHP tags. After PHP 3.0.13, an optional allowable_tags parameter has been added to specify HTML or PHP tags that you want to leave in. If the EOF is hit, FALSE is returned. gzopen() PHP. include_path to equal to 1, PHP looks for gz_file in the include_path directory, which is set in the php. ini file. Date and Time The date and time functions within PHP enable you to obtain. pointer for later operations. If you have include_path set to 1 , PHP will look for the gz_file in the include_path specified in the php. ini file. The mode parameter tells the function how to