gettype

PHP gettype()函数 (PHP gettype() function)

In PHP, we have a library function gettype() to identify the type of data. The function is primarily used to sanity check the type of data being input in a variable. The function can identify the data into the following data types:

在PHP中，我们有一个库函数gettype()来标识data的类型 。 该功能主要用于完整性检查变量中输入的数据类型。 该函数可以将数据识别为以下数据类型：

• Integer

  整数

• Double

  双

• String

  串

• Array

  数组

• Object

  目的

• Boolean

  布尔型

• Resource

  资源资源

• Null

  空值

• Unknown

  未知

Syntax:

句法：

    gettype($var)

Where, $var is a variable containing data that needs to be checked.

其中， $ var是包含需要检查的数据的变量。

Example 1:

范例1：

<?php
// Creating variables with random datatype
$var1 = 1;
$var2 = 1.1;
$var3 = NULL;
$var4 = "example";
$var5 = false;
// using gettype() function to 
// get the data type of the variable
echo gettype($var1)."\n";
echo gettype($var2)."\n";
echo gettype($var3)."\n";
echo gettype($var4)."\n";
echo gettype($var5)."\n";
?>

Output

输出量

integer
double
NULL
string
boolean

Example 2:

范例2：

<?php
// creating an array with random datatypes
$arr = array(21, 1.99, new stdClass, "hello, World", false);
// getting the type of each element of array
// foreach  is used to initialize array 
// as independent values
foreach ($arr as $value) {
// getting and printing the type
echo gettype($value), "\n";
}
?>

Output

输出量

integer
double
object
string
boolean

翻译自: https://www.includehelp.com/php/gettype-function-with-example.aspx

gettype