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returns:
returns true on success or false on failure.

returns string
use this extension at your own risk.

returns a new session.
# cd / usr / src / apache_1.3.xx # make clean # libs=-lpthread. / config.status # make # make install

it returns escaped string.
use of this function is recommended instead of addslashes().

if an error occurs, returns 0.
the file pointer must be valid, and must point to a file successfully opened by fopen().

returns the natural logarithm of arg.
as always you can calculate the logarithm in base b of a number n, but using the mathematical identity: log b (n) = log(n) / log(b), where log is the neperian (or natural) logarithm.

if the self test succeeds it returns zero.
if the self test succeeds it returns false.

in case of an error, it returns 1.
in case of an error, it returns true.

returns the arc cosine of arg in radians.
returns the arc cosine of arg in radians. acos() is the complementary function of cos(), which means that a==cos(acos(a)) for every value of a that is within acos() 'range.

it returns true if successful, false otherwise.
returns true on success or false on failure.

returns true on succes or false on failure.
returns true on success or false on failure.

if an error occurs, returns ip_address.
see also gethostbyname().

imagecreatefromgif() returns an empty string on failure.
to ease debugging the following example will produce an error gif:

returns the current directory, or false on error.
returns the current directory or false on error.

pg_connection_busy() returns true if connection busy.
pg_connection_busy() returns true if the connection is busy.

it returns true for success, otherwise it returns false.
returns true on success or false on failure.

returns false if unable to change directory, true otherwise.
see also getcwd().

imagesx() returns the width of the image identified by im.
imagesx() returns the width of the image identified by image.

mysql_thread_id() returns the current thread id.
if the connection is lost and you reconnect with mysql_ping(), the thread id will change.

returns false if unable to change the root directory, true otherwise.
this function will only function correct when you run php as command line too. (cli)