void ArrayIterator::uksort (callable $cmp_function)Parameters:This function takes a single parameter, $cmp_function,which contains a custom comparison function.Return value:this function is not returns no value.The following programs illustrate the ArrayIterator::uksort() function in PHP:
Program 1:
// Declare the 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 -> uksort ( "sorting" );
// Print a sorted array. print_r ( $arrItr );
?> Exit:ArrayIterator Object ( [storage: ArrayIterator: private] = > Array ([a] = > 4 [b] = > 2 [d] = > 6 [e] = > 1 [f] = > 9 [g] = > 8))
Program 2:
// Declare ArrayIterator $arrItr = new ArrayIterator ( array ( "b" = > "for" , " a " = > "Geeks" , "e" = > "Science" , "c" = > "Geeks" , "f" = > "Portal" , "d" = > "Computer"));
// 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 -> uksort ( ’comparison’ );
// Print the sorted ArrayObject print_r ( $arrItr );
?> Exit:ArrayIterator Object ( [storage: ArrayIterator: private] = > Array ([f] = > Portal [e] = > Science [d] = > Computer = > Geeks [b] = > for [a] = > Geeks))
Link: https://www.php .net / manual / en / arrayiterator.uksort.php
