[PHP] Practical functions 4_PHP tutorial

//Output the information page about PHP and the current request

int phpinfo(void)
//Return the current PHP version number

string phpversion(void)
//Print out List of people who contributed to this PHP project

string phpcredits(void)
//Var can be converted into an integer type. base is the base of the conversion, the default value is 10. The converted variable var can be
any type variable other than an array or class

int intval(mixed var,int[base])
//Get the double precision value of the variable

double doubleval(mixed var)
//Get the string value of the variable

string strval(mixed var)
//Return the type of the variable

string gettype(mixed var)
//Set the type of variable. If the conversion is successful, return true

int settype(string var,string type)
// Sort the array elements

void sort(array array)
// Sort the array Reverse sort the elements

void rsort(array array)
//Apply the user function to each element of the array

int array_walk(array array, string func)
//Count the number of elements in an array

int count(mixed var)
//Make the internal pointer of the array parameter point to the last element and return the element

mixed end( array array)
//Make the internal pointer of the array parameter point to the previous element and return the element

mixed prev(array array)
//Make the internal pointer of the array parameter point to the next element and return it Return the element

mixed next(array array)
//Make the internal pointer of the array parameter point to the first element and return the element

mixed reset(array array)
//Return the element pointed to by the internal pointer of the current array

mixed current(array array)
//Check whether there is the value given by needle in the haystack array, strict means strict matching (default value)

bool in_array(mixed needle,array haystack,[,bool strict])
//Return the index value of the next element in the array

array each(array array)
//Add elements to the end of the array

int array_push(array stack,mixed var[,mixed...])
//Pop an element from the end of the array

mixed array_pop(array stack)
//Pop an element from the beginning of the array

mixed array_shift(array stack)
//Return the element to the beginning of the array

mixed array_unshift( array stack)
//Return the current UNIX format timestamp

int time(void)
//Enter the time parameter, then return the UNIX format timestamp

int mktime( int hour,int minute,int second,int month,int day,int year)
//Get the Greenwich Mean Time in UNIX timestamp format

int gmmktime(int hour,int minute,int second ,int month,int day,int year)
//Format a time or date

string date(string format,int[timestamp])
//Get a date/time information Array of

array getdate(int [timestamp])
//If it is a valid date, return true

bool checkdate(int month,int day,int [timestamp])
//Format the time or date expression of the server according to the locale setting

string strftime(string format,int [timestamp])
//Convert the string representing date and time into time stamp. Strings in most typical data formats are accepted. For example, YYYY-MM-DD
and MM/DD/YYYY

int strtotime(string time,int now)
//Get the current time (UNIX timestamp format) millionth seconds value. Return string

string microtime(void)
//Return the current time in array type

array gettimeofday(void)
//Set a random number

void srand(int seed)
//Returns a random number. If the maximum and minimum range of random numbers are not specified, this function will automatically select a random number from 0 to rand_max
. If there are parameters specifying min and max, then take a number from the specified parameters

int rand([int min],[int max])
//Return the maximum allowable value of the random number

int getrandmax(void)

http://www.bkjia.com/PHPjc/318607.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/318607.htmlTechArticle//Output the information page about PHP and the current request intphpinfo(void) //Return the current PHP version number stringphpversion( void) //Print out the list of people who contributed to this PHP project stringphp...