PHP Data Type Detection Example detailed

PHP: Array data type instance details in PHP, there are a series of functions that detect data types, which can be used to detect different types of data to determine if they belong to the meter data type, and return true if they match, otherwise false.

The functions of the PHP detection data type are the following table

Function	Detection type	Example
Is_bool	Detects if a variable is a Boolean type	Is_bool (True), Is_bool (false)
Is_string	Detects if a variable is a string type	Is_string (' string '), is_string (1234)
Is_integer/is_int	Detects if a variable is an integer	Is_integer (Is_integer), (' 34 ')
Is_float/is_double	Detects if a variable is a floating-point type	Is_float (3.1415), is_float (' 3.1415 ')
Is_array	Detects if a variable is an array type	Is_array ($arr)
Is_object	Detects if a variable is an object type	Is_object ($obj)
Is_null	Detects if a variable is null	Is_null (NULL)
Is_numeric	A string that detects whether a variable is a number or a number	Is_numeric (' 5 '), Is_numeric (' bccd110 ')

PHP Data Type detection instance

The functions and usages of the PHP detection data type are the same, and the following example uses the Is_numeric () function to detect whether the data in the variable is a number.

<?phpheader ("Content-type:text/html;charset=utf-8");              Set character encoding $boo= "1234567890";             Describes a string variable that consists entirely of numbers if (Is_numeric ($boo)) {                                   //Determines whether the variable is made up of numbers    echo "Variable Boo belongs to a string type consisting of numbers:". $boo;       If the variable is output}else    echo "cannot be judged";//Otherwise, the statement is output?>

Code Run Result:

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

In this chapter, we explain a series of PHP data types: PHP Eight data types, PHP: Boolean type (Boolean) data type instance, PHP: String data type instance details, PHP: integer type (integer) data type instance detailed, PHP: Examples of floating-point (float) data types in detail, PHP: Array data type instances, PHP: Object data type examples, PHP: Resource (Resource) data type examples, PHP: null (NULL) data type instance in detail, PHP data type Conversion example in detail I hope you through this series of learning, PHP data types have a deeper understanding.

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