Sizeof PHP: the size of arrays and objects, reducing the execution time of scripts

sizeof php count(), count(), " - " . , - COUNT_RECURSIVE, 1 ( - 0), , .

PHP: ?

count() sizeof php , .

$array = array(
	"fruit" =>array(
		"apple", 
		"bananas",
		"orange",
	),
	"vegetables" =>array(
		"potatoes", 
		"tomatoes",
	),
);

echo "  = ".sizeof($array); //  = 2
echo "  = ".sizeof($array, 1); // = 7 

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

( 65000 ) , sizeof() , count(), .

sizeof php , , .

$test = array( 1, 2, 3, 4 );
$sizeof_test = sizeof( $test );
for ( $it=0; $it < $sizeof_test; $it++ ) { 
	echo $test[$it];
}
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

1000 , 250 .

:

$test2 = array( '', null, false, 0 );
var_dump( sizeof( $test2 ) ); // int(4)
var_dump( sizeof( array_filter( $test2 ) ) ); // int(0)
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

, sizeof php ( count ), , , ( ) array_filter .

$test2:

$test2 = array( '',null,false,0, array() );       // int(0)
$test2 = array( '',null,false,0, array( null ) ); // int(1)
var_dump( sizeof( array_filter( $test2 ) ) );
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

array_filter , , "null" "" , sizeof php .

, array_filter?

$test2 = array('', null, false, 0, array() );       // int(5)
$test2 = array('', null, false, 0, array( null ) ); // int(5)
$t_rec = array('', null, false, 0, array() );       // int(5)
$t_rec = array('', null, false, 0, array( null ) ); // int(6)
var_dump( sizeof( $test2 ) );
var_dump( sizeof( $t_rec, 1 ) );
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

, - , . .

StdClass json_decode sizeof php?

$json = '{ "foo": "bar", "number": 10 , "car": "BMW" }';
$stdInstance = json_decode( $json );
var_dump( sizeof( ( array )$stdInstance ) ); // int(3)
var_dump( sizeof( get_object_vars( $stdInstance ) ) ); // int(3)
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

Sizeof() Countable. StdClass , . , get_object_vars. (array) , .

Get_object_vars , .