php boolean variable

Answer the question in the previous section first. 01 02 $foo= 10; 03 $bar= 20; 04   05

#一, PHP variable definition: Variables are used to store values, such as numbers, text strings or arrays, V: string/integer/double/array/object Naming rules: 1. The variable name of PHP is case-sensitive. 2. The variable name must begin with $3,

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PHP Boolean data type falsetrue usage introduction. In php, falsetrue is true or false. in php, falsetrue is called a Boolean data type. it is a common data type. for example, conditional judgment is also a Boolean data type, in php, false true

$ In php represents a variable, but how can I know the type of this variable? $ In php represents a variable, but how can I know the type of this variable? Reply to discussion (solution) PHP provides six functions (boolean is_int (mixed variable),

The $ in PHP represents a variable, but what is the type of the variable to know? Reply to discussion (solution) PHP provides a total of six functions (they are Boolean is_int (mixed variable), Boolean is_float (mixed variable), Boolean is_bool

using PHP functions to $x compare variables An expression GetType () empty () is_null () isset () boolean : if ($x) $x = ""; string true false

using PHP functions to $x compare variables An expression GetType () empty () is_null () isset () boolean : if ($x) $x = ""; string true false

In programming, many times we need to make a Boolean decision about the variable. But sometimes the result of the procedure is different from what we expected, today we will test the situation of PHP in various situations. How to tell if a variable

Now the development of the site to use the Smarty framework template, feel very good, better realize the PHP source code and the separation of HTML. Now share some common variables of smarty. 1, smarty_dir SMARTY directory Locate the full system