Converts the character of an IP-point address back to the IP V4 format address
int Ip2long (string ip_address)
A string that converts an IP V4 format address back to an IP point sub-address
String Long2ip (int proper_address)
Gets the environment variable varname, succeeds returns the variable value, the failure is passed back false
String getenv (String varname)
Used to set the system environment
void Putenv (String setting)
Get the main name of the current PHP script
String Get_current_user (void)
Call Function_name the specified user function
String Get_cfg_var (String function_name[,mixed parrameter[,mixed ...])
Returns the port associated with the Service (protocol), which must be TCP or UDP
int Getservbyname (String service,string protocol)
Returns the service name (protocol) associated with port, which must be TCP or UDP
String Getservbyport (int port,string protocol)
Take absolute value
Mixed ABS (mixed number)
Open square root
float sqrt (float arg)
The quadratic value of the natural logarithm E
FLOAT exp (float arg)
return pi
Double pi (void)
Rounded
Double round (double val)
Calculates the smallest integer greater than the specified number
int Ceil (float number)
Calculates the maximum integer less than the specified
int floor (float number)
Take maximum value
Mixed max (mixed arg1,mixed arg2...mixed argn)
Take the minimum value
Mixed min (mixed arg1,mixed arg2...mixed argn)
Take a random number
int rand ([int min],[int Max])
Numbering conversion
String Base_convert (String number,int frombase,int tobase)
Formatting numeric strings
String Number_format (float number,int[decimals],string[decpoint],string[thounsands_sep])
http://www.bkjia.com/PHPjc/318591.html www.bkjia.com true http://www.bkjia.com/PHPjc/318591.html techarticle //Convert the character of the IP dot address back to the IPV4 format address Intip2long (stringip_address)///Convert the IPV4 format address back to the IP point sub-address string Stringlong2ip (intproper_address )//Get ring ...
