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PHP Ds / Set first () function

Syntax:
void public DsSet::first (void)
Parameter: this function takes no parameters.Return Value:This function returns the first value of the set.The following programs illustrate the Ds / Set function: : first()in PHP:Program 1 :  
// PHP illustration program
// first() function 
// Create an instance of the set $set = new DsSet();  
// Add elements to the Set $set -> add ( "Welcome" ); $set -> add ( "to" ); $set -> add ( "GfG" );  
// Print the first item in the set print_r ( $set -> first());  
?>
Exit:
Welcome
Program 2 :  
// PHP illustration program
// first() function 
// Create an instance of the set $set = new DsSet();  
// Add elements to the Set $set -> add ( "10" ); $set -> add ( "20" ); $set -> add ( "30" );  
// Print the first item in the set print_r ( $set -> first());  
?>
Exit:
10
Link: http: // php. net / manual / en / ds-set.first.php

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