mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in

 

$total_record = mysqli_num_rows($result);

Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in C:\xampp\htdocs\part3ex\message_box.php:47 Stack trace: #0 C:\xampp\htdocs\part3ex\message_box.php(47): mysqli_num_rows(false) #1 {main} thrown in C:\xampp\htdocs\part3ex\message_box.php on line 47

 

mysqli_num_row($result)값이 없을때 처리가 필요

 

if(mysqli_num_rows($result)){
	$total_record = mysqli_num_rows($result);
}

도 에러가 뜬다

 

if($result && mysqli_num_rows($result)){
	$total_record = mysqli_num_rows($result);
}

PHP8 이후에는 이렇게 써야된다고함

 

참고

(https://reviews-tutorials.com/tutorials/php-8-error-fatal-error-uncaught-typeerror-mysqli_num_rows-argument-1-must-be-of-type-mysqli_result/)