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List of All PHP Variable Handling Functions

Updated on September 18, 2011


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.

Variable Handling Functions in PHP
Variable Handling Functions in PHP
Function Name
Description / Usage
Dumps a string representation of an internal zend value to output
void debug_zval_dump ( mixed $variable )
Alias of floatval()
Determine whether a variable is empty
bool empty ( mixed $var )
Get float value of a variable
float floatval ( mixed $var )
Returns an array of all defined variables
array get_defined_vars ( void )
Returns the resource type
string get_resource_type ( resource $handle )
Get the type of a variable
string gettype ( mixed $var )
Import GET/POST/Cookie variables into the global scope
bool import_request_variables ( string $types [, string $prefix ] )
Get the integer value of a variable
int intval ( mixed $var [, int $base = 10 ] )
Finds whether a variable is an array
bool is_array ( mixed $var )
Finds out whether a variable is a boolean
bool is_bool ( mixed $var )
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 ]] )
Alias of is_float()
Finds whether the type of a variable is float
bool is_float ( mixed $var )
Find whether the type of a variable is integer
bool is_int ( mixed $var )
Alias of is_int()
Alias of is_int()
Finds whether a variable is NULL
bool is_null ( mixed $var )
Finds whether a variable is a number or a numeric string
bool is_numeric ( mixed $var )
Finds whether a variable is an object
bool is_object ( mixed $var )
Alias of is_float()
Finds whether a variable is a resource
bool is_resource ( mixed $var )
Finds whether a variable is a scalar
bool is_scalar ( mixed $var )
Find whether the type of a variable is string
bool is_string ( mixed $var )
Determine if a variable is set and is not NULL
bool isset ( mixed $var [, $... ] )
Prints human-readable information about a variable
mixed print_r ( mixed $expression [, bool $return = false ] )
Generates a storable representation of a value
string serialize ( mixed $value )
Set the type of a variable
bool settype ( mixed &$var , string $type )
Get string value of a variable
string strval ( mixed $var )
Creates a PHP value from a stored representation
mixed unserialize ( string $str )
unset() destroys the specified variables.
void unset ( mixed $var [, mixed $... ] )
Dumps information about a variable
void var_dump ( mixed $expression [, $... ] )
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).


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    • priyankmaniar profile image


      6 years ago from Mumbai, India

      nice list mate.


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