The SplObjectStorage::rewind() function is an inbuilt function in PHP which is used to rewind the iterator to the first storage element.
Syntax:
void SplObjectStorage::rewind()
Parameters: This function does not accept any parameter.
Return Value: This function does not return any value.
Below programs illustrate the SplObjectStorage::rewind() function in PHP:
Program 1:
<?php // Create an empty SplObjectStorage $str = new SplObjectStorage();
$obj = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
$str ->attach( $obj , "GFG" );
$str ->attach( $obj2 , "Geeks" );
$str ->attach( $obj3 , "FORK JAVA" );
// Using rewind function $str -> rewind ();
// Get current data var_dump( $str ->getInfo());
// Move on to next object $str ->next();
// Get current data var_dump( $str ->getInfo());
// Again using rewind function $str -> rewind ();
// Get current data var_dump( $str ->getInfo());
?> |
Output:
string(3) "GFG" string(5) "Geeks" string(3) "GFG"
Program 2:
<?php $obj1 = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
$gfg = new SplObjectStorage();
$gfg [ $obj1 ] = "GFG" ;
$gfg [ $obj2 ] = "GeeksClasses" ;
$gfg [ $obj3 ] = "SUDO" ;
// Using rewind function $gfg -> rewind ();
while ( $gfg ->valid()) {
var_dump( $gfg ->getInfo());
// Moving to next element
$gfg ->next();
} ?> |
Output:
string(3) "GFG" string(12) "GeeksClasses" string(4) "SUDO"
Reference: https://www.php.net/manual/en/splobjectstorage.rewind.php