How to use PHP gettype()

In PHP, the gettype() function can obtain the type of a variable and is used to check the type of an existing variable. The syntax format is "gettype (variable name)"; the return value is boolean, integer, double, string, array , object, resource, NULL, etc.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

gettype() function is a built-in function in PHP Function that gets the type of a variable; it is used to check the type of an existing variable.

Syntax

string gettype ( mixed $var )

Parameters: This function accepts a single parameter $var. It is the variable name whose type needs to be checked.

Return value: This function returns a string type value. Possible values ​​for the returned string are:

• boolean

• integer

• double

• string

• ##array

• object

• resource

• NULL

• unknown type

Example:

<?php
$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($var1)."<br>";
echo gettype($var2)."<br>";
echo gettype($var3)."<br>";
echo gettype($var4)."<br>";
echo gettype($var5)."<br>";
echo gettype($var6)."<br>";
echo gettype($var7)."<br>";
echo gettype($var8)."<br>";
?>

boolean
integer
double
string
array
object
NULL
resource

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