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PHP ArrayIterator uasort () function

Syntax:
void ArrayIterator::uasort (callable $cmp_function)
Parameters:This function takes a single parameter, $cmp_function,which is a user-defined comparison function. This comparison function takes two parameters, which are ArrayIterator values ​​and returns less than, equal to, or greater than zero if the first argument is less than, equal, or greater than zero, respectively.Return value:this function does not return any value.The following programs illustrate the ArrayIterator::uasort() function in PHP:
Strong > Program 1:  
// Declare ArrayIterator $arrItr = new ArrayIterator ( array ( "a" = > 4, "b" = > 2, "g" = > 8, "d" = > 6, "e" = > 1, "f" = > 9 ) );  
// User-defined comparator function function sorting ( $a , $b ) { if ( $a == $b ) return 0; return ( $a < $b )? -eleven; } $arrItr -> uasort ( "sorting" );  
// Print a sorted array. print_r ( $arrItr );  
?>
Exit:
ArrayIterator Object ( [storage: ArrayIterator: private] = > Array ([e] = > 1 [b] = > 2 [a] = > 4 [d] = > 6 [g] = > 8 [f] = > 9))
Program 2:  
// Declare ArrayIterator $arrItr = new ArrayIterator ( array ( "a" = > "Geeks" , "b" = > "for" , "c" = > "Geeks" , "d" = > "Computer" , "e" = > "Science" , "f" = > "Portal" ));  
// Declare the comparison function for sorting // values ​​in descending order function comparison ( $val1 , $val2 ) { if ( $val1 == $val2 ) { return 0; } else if ( $val1 > $val2 ) return - 1; else return 1; } $arrItr -> uasort ( ’comparison’ );  
// Print the sorted ArrayObject print_r ( $arrItr );  
?>
Exit:
ArrayIterator Object ( [storage: ArrayIterator: private] = > Array ([b] = > for [e] = > Science [f] = > Portal [a] = > Geeks = > Geeks [d] = > Computer))
Link: https://www.php .net / manual / en / arrayiterator.uasort.php

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