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List of All PHP Variable Handling Functions
Introduction
Here, On this Page, I'm Publishing the list of all variable handling functions in PHP With some details such as syntax, Description etc. As the name suggests, These type of PHP functions deals with information associated with variable. Here, "information" refers either to Value of Variable OR properties of variable. Type of tasks that PHP Variable handling functions do are listed below.
- Information Modification - Tasks Such as Case/Type Conversion,
- Deletion - Tasks such as destroying a variable,
- Displaying / Outputting Data - Print Out the formatted or original output on screen,
- Type Checking - Whether a Variable is Int, float, bool, string, array etc.
List of Variable Handling Functions
Here, Below is the full list of all PHP Variable Handling functions.
- Learn About PHP function syntax
In this PHP Tutorial, I'll explain some of the basics about PHP function Syntax (or I say syntax of PHP function), Which one should have in understanding it without any confusion.
Function Name
| Description / Usage
| Syntax
|
|---|---|---|
debug_zval_dump
| Dumps a string representation of an internal zend value to output
| void debug_zval_dump ( mixed $variable )
|
doubleval
| Alias of floatval()
| |
empty
| Determine whether a variable is empty
| bool empty ( mixed $var )
|
floatval
| Get float value of a variable
| float floatval ( mixed $var )
|
get_defined_vars
| Returns an array of all defined variables
| array get_defined_vars ( void )
|
get_resource_type
| Returns the resource type
| string get_resource_type ( resource $handle )
|
gettype
| Get the type of a variable
| string gettype ( mixed $var )
|
import_request_variables
| Import GET/POST/Cookie variables into the global scope
| bool import_request_variables ( string $types [, string $prefix ] )
|
intval
| Get the integer value of a variable
| int intval ( mixed $var [, int $base = 10 ] )
|
is_array
| Finds whether a variable is an array
| bool is_array ( mixed $var )
|
is_bool
| Finds out whether a variable is a boolean
| bool is_bool ( mixed $var )
|
is_callable
| Verify that the contents of a variable can be called as a function
| bool is_callable ( callback $name [, bool $syntax_only = false [, string &$callable_name ]] )
|
is_double
| Alias of is_float()
| |
is_float
| Finds whether the type of a variable is float
| bool is_float ( mixed $var )
|
is_int
| Find whether the type of a variable is integer
| bool is_int ( mixed $var )
|
is_integer
| Alias of is_int()
| |
is_long
| Alias of is_int()
| |
is_null
| Finds whether a variable is NULL
| bool is_null ( mixed $var )
|
is_numeric
| Finds whether a variable is a number or a numeric string
| bool is_numeric ( mixed $var )
|
is_object
| Finds whether a variable is an object
| bool is_object ( mixed $var )
|
is_real
| Alias of is_float()
| |
is_resource
| Finds whether a variable is a resource
| bool is_resource ( mixed $var )
|
is_scalar
| Finds whether a variable is a scalar
| bool is_scalar ( mixed $var )
|
is_string
| Find whether the type of a variable is string
| bool is_string ( mixed $var )
|
isset
| Determine if a variable is set and is not NULL
| bool isset ( mixed $var [, $... ] )
|
print_r
| Prints human-readable information about a variable
| mixed print_r ( mixed $expression [, bool $return = false ] )
|
serialize
| Generates a storable representation of a value
| string serialize ( mixed $value )
|
settype
| Set the type of a variable
| bool settype ( mixed &$var , string $type )
|
strval
| Get string value of a variable
| string strval ( mixed $var )
|
unserialize
| Creates a PHP value from a stored representation
| mixed unserialize ( string $str )
|
unset
| unset() destroys the specified variables.
| void unset ( mixed $var [, mixed $... ] )
|
var_dump
| Dumps information about a variable
| void var_dump ( mixed $expression [, $... ] )
|
var_export
| Outputs or returns a parsable string representation of a variable
| mixed var_export ( mixed $expression [, bool $return = false ] )
|
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So, That was the full list of all PHP Variable Handling functions which are core part of PHP and are available in latest released version of PHP (A Server Side Programming Language).
