PHP Developer''''s Dictionary- P71 pptx

fgets Syntax string fgetsint fp, int length; Description The fgets function reads the file referenced by fp and returns a string of length – 1.. fgetss Syntax string fgetssint fp,

Description

The fgetcsv() function gets a line of data from a comma-separated value (CSV) file referenced by the file pointer, fp It returns an array with the values separated by

the optional delimiter If delimiter is not specified, a comma (,) is assumed The

parameter length is the longest line of the CSV file allowing for trailing carriage

returns and line feeds

Note

A blank line in the input CSV file will be translated into an array with one null field The blank line will not be interpreted as an error

fgets()

Syntax

string fgets(int fp, int length);

Description

The fgets() function reads the file referenced by fp and returns a string of length –

1 If an end of file (EOF) is reached, the length parameter is ignored and the string

is returned The function will return false, 0, if there is an error reading the file

fgetss()

Syntax

string fgetss(int fp, int length, string [allowable_tags]);

Description

The fgetss() function reads the file referenced by fp , and returns a string of length

–1 If an end of file (EOF) is reached, the length parameter is ignored and the string

is returned This function strips out any HTML or PHP tags from the input file The optional parameter allowable_tags defines any tags that are not to be stripped out

of the input file The function will return false, 0, if there is an error reading the file

file()

Syntax

array file(string filename, int [use_include_path]);

Description

The file() function reads the file specified by filename and returns an array

containing each line of the file If the optional parameter include_path is set to 1, the file will be searched for in the include path

file_exists()

Syntax

int file_exists(string filename);

Description

The file_exists() function checks for the file defined by filename and if it exists,

the function returns true, 1 If the file doesn't exist, false, ((0)) is returned

Note

The results of this function are cached by PHP Any subsequent calls to file_exists() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

fileatime()

Syntax

int fileatime(string filename);

Description

The fileatime() function returns the last access time of the file defined by

filename The format of this time is the standard UNIX time format, which is the

number of seconds since the start of the UNIX epoch, or January 1, 1970 The function returns false, 0, if an error is returned

Note

The results of this function are cached by PHP Any subsequent calls to fileatime() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

filectime()

Syntax

int filectime(string filename);

Description

The filectime() function returns the last changed time of the file specified by

filename The format of this time is the standard UNIX time format, which is the

number of seconds since the start of the UNIX epoch, or January 1, 1970 This function returns false, 0, if an error was encountered

Note

The results of this function are cached by PHP Any subsequent calls to filectime() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

filegroup()

Syntax

int filegroup(string filename);

Description

The filegroup() function returns the group identifier (GID) of the owner of the file specified by filename This function returns false, 0, if an error is encountered

Windows always returns false, 0

Note

The results of this function are cached by PHP Any subsequent calls to filegroup() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

fileinode()

Syntax

int fileinode(string filename);

Description

The fileinode() function returns the inode number of the file specified by filename This function returns false, 0, if an error is encountered Because Windows does not have an equivalent, it always returns false, 0

Note

The results of this function are cached by PHP Any subsequent calls to fileinode() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

filemtime()

Syntax

int filemtime(string filename);

Description

The filemtime() function returns the last modified time of the file specified by

filename The format of this time is the standard UNIX time format, which is the

number of seconds since the start of the UNIX epoch, or January 1, 1970 This function returns false, 0, if an error is encountered

Note

The results of this function are cached by PHP Any subsequent calls to filemtime() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

fileowner()

Syntax

int fileowner(string filename);

Description

The fileowner() function returns the user identifier (UID) of the owner of the file specified in filename This function returns false, 0, if an error is encountered

Because Windows does not have an equivalent, it always returns false, 0

Note

The results of this function are cached by PHP Any subsequent calls to fileowner() will return the same results even if the environment has changed The cache is cleared through the clearstatcache() function

fileperms()

Syntax

int fileperms(string filename);

Description

The fileperms() function returns the permissions on the file specified by filename (see Tables 9.3 and 9.4) The permissions are returned in the standard octal or binary format This function returns false, 0, if an error is encountered

Table 9.3 Permissions Returned by fileperms() on a UNIX System

0(000) No permissions

1(001) Execute