Detailed explanation of PHP data type detection examples

php: Detailed explanation of array data type examples In PHP, there are a series of functions for detecting data types. Different types of data can be detected to determine whether they belong to the MiG data type. If they match, true will be returned. Otherwise return false.

PHP functions to detect data types are as follows

##FunctionDetection type Exampleis_boolDetect whether the variable is of Boolean typeis_bool(true),is_bool(false)is_stringDetect whether the variable is of string typeis_string('string'),is_string(1234)is_integer/is_intDetect whether the variable is an integeris_integer(34),is_integer('34')##is_float/is_doubleis_array##is_objectDetect whether the variable is an object typeis_object($obj )is_nullDetect whether the variable is nullis_null(null)is_numericDetect whether the variable is a number or a string of numbersis_numeric('5'),is_numeric('bccd110')PHP data type detection example

The functions and usage of PHP data type detection functions are the same. Our following example uses the is_numeric() function to detect whether the data in the variable is It's a number.

<?php
header("content-type:text/html;charset=utf-8");              //设置字符编码

$boo="1234567890";             //说明一个全由数字组成的字符串变量

if(is_numeric($boo)){                                   //判断该变量是否由数字组成
    echo "变量boo属由数字组成的字符串类型:".$boo;       //如果是输出该变量
}else
    echo"无法判断"; //否则，输出该语句

?>

Code running results:

The above example is the usage of our is series functions.

In this chapter, we have explained a series of PHP data types: Eight data types of PHP, php: Detailed explanation of Boolean data type examples, php: Detailed explanation of string data type examples , php: Detailed explanation of integer data type examples , php: Float data type examples Detailed explanation , php: Detailed explanation of array data type instance , php: Detailed explanation of object data type instance , php: Resource data type Detailed explanation of examples , php: Detailed explanation of null data type examples , Detailed explanations of php data type conversion examples I hope that through this series of studies, you will have an understanding of PHP data types. A deeper understanding.

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Detect whether the variable is of floating point type	is_float(3.1415),is_float('3.1415')
Detect whether the variable is For array type	is_array($arr)

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