Detailed Usage syntax of the PHP function sizeof () _ PHP Tutorial

The usage syntax of the PHP function sizeof () is described in detail. The sizeof () syntax of the PHP function: sizeof (arrayname); prompt and description Note: This function may return 0. if a variable is not set, it may also return 0, ifSyntax of the PHP function sizeof:

Sizeof (arrayname );

Tips and instructions

Note: This function may return 0. if a variable is not set, but it may also return 0, if a variable contains an empty array. This isset () function can be used to test whether a variable is set.

Let's take a look at the sizeof () instance of the PHP function.

 
 

  
  
 php 
  
  
$people = array("a", "Joe", "b", "C"); 
  
  
$result = sizeof($people); 
  
  
 
  
  
echo $result; 
  
  
?> 
 
 

Output result: 4

From the above example, we can see that the sizeof () function of PHP is the same as the count method.

Syntax of the semi PHP function sizeof (): sizeof (arrayname); prompt and description Note: This function may return 0. if a variable is not set, it may also return 0, if...