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:


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


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


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


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


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


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


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


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



<? Php

$ Boo = "1234567890 ";

If (is_numeric ($ boo ))

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


Echo "unable to judge ";



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