Question

which function is used to check the data type of variable


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Answer 1

Answer:

PHP | gettype() Function

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.

Explanation:

PHP | gettype() Function

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.

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