Detection data type php function set

Source: Internet
Author: User
Tags php tutorial

Php Tutorial function set for checking data types

The detection data type is used to detect the data type and determine whether the detected data type belongs to the detection type. If yes, the system returns TRUE. Otherwise, the system returns false. The detection data type is defined as follows:

Is_bool

Boolean type, for example, is_bool (srue) is_bool (false)


Is_string

String type or not. For example, is_string ('string') is_string (1234)


Is_float/double

Float type or not, for example, is_float (3.1415) is_float ('3. 1415 ')


Is_integer/int

Whether it is an integer. For example, is_integer (34) is_integer ('34 ')


Is_null

Whether it is null. For example, is_null (null)


Is_array

Array or not, for example, is_array ($ arr)


Is_object

Whether it is an object, for example, is_object ($ obj)


Is_numeric

Whether it is a number or a string composed of digits. For example, is_numeric ('5') is_numeric ('bcc110 ')

 

Example

<? Php

$ Boo = "1234567890 ";

If (is_numeric ($ boo ))

Echo "the variable boo is a string consisting of numbers:". $ boo;

Else

Echo "unable to judge ";

?>

 

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