Tools Tags

PHP form

PHP form PHP form validation PHP form - required fields Form verification email and URL PHP complete form example PHP $_GET variable PHP $_POST variable

PHP Advanced Tutorial

PHP multidimensional array PHP date PHP contains PHP files PHP file upload PHP Cookie PHP Session php E-mail PHP Safety Email PHP Error PHP Exception PHP filter PHP advanced filter PHP JSON

PHP 7 new features

PHP database

Introduction to PHP MySQL PHP MySQL connection PHP MySQL creates database PHP MySQL creates data table PHP MySQL insert data PHP MySQL insert multiple pieces of data PHP MySQL prepared statements PHP MySQL reads data PHP MySQL Where PHP MySQL Order By PHP MySQL Update PHP MySQL Delete PHP ODBC

PHP XML

PHP XML Expat XML DOM XML SimpleXML

PHP and AJAX

Introduction to AJAX AJAX PHP AJAX database AJAX XML AJAX real-time search AJAX RSS Reader AJAX voting

Home

Backend Development

PHP

PHP complete self-study manual

Functions available in PHP

Collection 1351

update time 2016-09-11

PHP PCRE

PHP available functions

PHP provides many available standard functions. The following table lists some commonly used ones:

Get the type of variableImport GET/POST/Cookie variables into the global scopeDetect whether the variable is an arrayDetect whether the variable is BooleanCheck whether the parameter is a legal callable structureis_float’s aliasDetect whether the variable is a floating point typeCheck whether the variable is an integeralias of is_intDetect whether the content of the variable is an iterable valuealias of is_intDetect whether the variable is NULLDetect whether the variable is a number or a numeric stringPrint the relevant information of the variableOutput or return a variable, expressed in string form

Function	Description
boolval	Get the Boolean value of the variable
debug_zval_dump	View the reference count and type information of a variable in the zend engine
doubleval	Alias for floatval
empty	Check a variable Whether it is empty
floatval	Get the floating point value of the variable
get_defined_vars	Returns an array composed of all defined variables
get_resource_type	Return resource type
##gettype
import_request_variables
intval	Get the integer value of the variable
##is_array
is_bool
is_callable
is_double
is_float
is_int
is_integer
is_iterable
is_long
is_null
is_numeric
is_object	Detect whether the variable is an object
is_real	is_float’s alias
is_resource	Detect whether the variable is a resource type
is_scalar	Detect whether the variable is a scalar
is_string	Detect whether the variable is a string
isset	Detect whether the variable has been set and is not NULL
print_r	Print variables and output easy-to-read information.
serialize	Serialize object
settype	Set the type of variable
strval	Get the string value of the variable
unserialize	Create a PHP value from a stored representation
unset	Release the given variable
##var_dump
var_export

Password hashing algorithm

Function Descriptionpassword_get_info password_hash password_needs_rehash password_verify


	Returns information related to the specified hash (hash)
	Create a password Hash
	Check whether the hash value matches the specified option
	Verify whether the password matches the hash value