The gettype() function is an inbuilt function in PHP which is used to get the type of a variable. It is used to check the type of existing variable.
Syntax:
string gettype ( $var )
Parameter: This function accepts a single parameter $var. It is the name of variable which is needed to be checked for type of variable.
Return Value: This function returns a string type value. Possible values for the returned string are:
- boolean
- integer
- double (for historical reasons “double” is returned in case of float)
- string
- array
- object
- resource
- NULL
- unknown type
Below programs illustrate the gettype() function in PHP:
Program 1:
<?php // PHP program to illustrate gettype() function $var1 = true; // boolean value $var2 = 3; // integer value $var3 = 5.6; // double value $var4 = "Abc3462"; // string value $var5 = array(1, 2, 3); // array value $var6 = new stdClass; // object value $var7 = NULL; // null value $var8 = tmpfile(); // resource value echo gettype($var1)."\n"; echo gettype($var2)."\n"; echo gettype($var3)."\n"; echo gettype($var4)."\n"; echo gettype($var5)."\n"; echo gettype($var6)."\n"; echo gettype($var7)."\n"; echo gettype($var8)."\n"; ?> |
Output:
boolean integer double string array object NULL resource
Program 2:
<?php // PHP program to illustrate gettype() function $var1 = "GfG"; $var2 = 10 % 7; $var3 = pow(10, 2); $var4 = pow(10, 0.5); $var5 = sqrt(9); echo gettype($var1)."\n"; echo gettype($var2)."\n"; echo gettype($var3)."\n"; echo gettype($var4)."\n"; echo gettype($var5); ?> |
Output:
string integer integer double double
Reference: http://php.net/manual/en/function.gettype.php
PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.
