PHP number, character, object judgment function _php Tutorial

In PHP judging numbers, characters, objects, arrays, etc. include the functions of See Is_bool (), Is_int (), Is_integer (), Is_float (), Is_real (), Is_object (), and Is_array (), I don't know how much you know.

Double Precision number judgment

Is_double
Is_double--alias of Is_float ()
Describe
This function is an alias function of Is_float ().

The code is as follows	Copy Code
$Temperature = 15.23; if (is_double ($Temperature)) { Print ("Temperature is a double". " "); }

Integer judgments

Aliases for Is_integer--is_int () and Is_long ()
Describe
This function is an alias function of Is_int ().

The code is as follows	Copy Code
$PageCount = 2234; if (Is_integer ($PageCount)) { Print ("$PageCount is an integer". " "); }

Object judgment

Is_object--detects if a variable is an object
Describe
BOOL Is_object (mixed Var)

Returns TRUE if Var is an object, otherwise FALSE.

The code is as follows	Copy Code
Class Widget { var $name; var $length; } $thing = new Widget; if (Is_object ($thing)) { Print ("thing is an object". " "); }

Character judgment

Is_string--detects if a variable is a string
Describe
BOOL Is_string (mixed Var)

Returns TRUE if Var is a string, otherwise FALSE.

The code is as follows	Copy Code
$Greeting = "www.hzhuti.com"; if (is_string ($Greeting)) { Print ("Greeting is a string". " "); }

Is_numeric--detects if a variable is a numeric or numeric string
Describe
BOOL Is_numeric (mixed Var)

Returns TRUE if Var is a numeric and numeric string, otherwise FALSE is returned.

The code is as follows	Copy Code
$int = 1; if (Is_numeric ($int)) { Print ("This is a real figure, pure man.") "); }

Okay, this article is simply about the PHP object, the number, the character judgment function, the difficulty is relatively super simple.

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