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PHP Ds / Set clear () function

Syntax:
void public DsSet::clear (void)
Parameters: This function takes no parameters.Returned value:This function does not return any value.The following programs illustrate the Ds / Set function: : clear()in PHP:Program 1:  
// Declare a new set $set = new DsSet ([1, 2, 3, 4, 5, 6]);  
// Show Set Element print_r ( $set );  
// Use the clear() function to remove elements $set -> clear();  
// Show Set Element print_r ( $set );  
?>
Exit:
DsSet Object ( [0] = > 1 [1] = > 2 [2] = > 3 [3] = > 4 [4] = > 5 [5] = > 6) DsSet Object()  Program 2:        
// Declaring a new set $set = new DsSet ([10, 15, 21, 13, 16, 18 ]);  
// Show Set Element var_dump ( $set );  
// Use the clear() function to remove elements $set -> clear();  
// Show Set Element var_dump ( $set );  
?>
Exit:
object (DsSet ) # 1 (6) {[0] = > int (10) [1] = > int (15) [2] = > int (21) [3] = > int (13) [4] = > int (16) [5] = > int (18)} object (DsSet) # 1 (0) {}
Link: http://php.net/manual/en/ds-set.clear.php

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