What is strict type php?

The default behavior in PHP is to attempt to convert scalar values of incorrect type into the expected type. For example, a function expecting a string can still be called with an integer argument, because an integer can be converted into a string as shown in the following example:

Without strict typing, PHP will change the integer 12 to string "12". In strict mode, only a variable of the exact type of the type declaration will be accepted, or a TypeError will be
thrown:
declare(strict_types = 1);

function getString(string $str) {
 var_dump($str);
}

$int = 12;
getString($int);

//Fatal error: Uncaught TypeError: Argument 1 passed to getString() must be of the type string, integer given...
The only exception to this rule is that an integer may be given to a function expecting a float. Function calls from within internal functions will not be affected by the strict_types declaration:
declare(strict_types=1); affects both parameters and return type declarations of scalar type, which must then be of the exact type declared in the function:
Note: You must configure the declare(strict_types = 1); statement in the first line of your code, or else it will generate a compile
error. Also, it does not affect the included files, you need to declare the declare(strict_types = 1); statement on the top of each file.
Data types in PHP:
Data Types
Determine
Variable Data Type
Type Conversion: Convert variable data type
Type Declaration
Strict Typing Mode
Testing, setting, and unsetting variables
 

			
Is PHP syntax strict?
			
PHP is a Loosely Typed Language

 Since the data types are not set in a strict sense, you can do things like adding a string to an integer without causing an error.
		
			
How do you mention strict requirements about data types in PHP?
			
In PHP the declare(strict_types = 1); directive enables strict mode. In strict mode, only a variable of the exact type of the “type declaration” will be accepted, or a TypeError will be thrown. Without strict typing, PHP will change the integer 12 to string "12" .
		
			
What is weak type in PHP?
			
For instance, a function that is given a float for a parameter that expects an integer will get a variable of type integer . In other words, PHP will try to “fallback” to the target type from the given type whenever it can. This is called “weak typing”.
		
			
What is return type in PHP?
			
Definition and Usage. The return keyword ends a function and, optionally, uses the result of an expression as the return value of the function. If return is used outside of a function, it stops PHP code in the file from running.