sort Sort an array &reftitle.description; boolsort arrayarray intflagsSORT_REGULAR This function sorts an array. Elements will be arranged from lowest to highest when this function has completed. ¬e.sort-unstable; &reftitle.parameters; array The input array. &sort.flags.parameter; &reftitle.returnvalues; &return.success; &reftitle.examples; <function>sort</function> example $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } ?> ]]> &example.outputs; The fruits have been sorted in alphabetical order. <function>sort</function> example using case-insensitive natural ordering $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } ?> ]]> &example.outputs; The fruits have been sorted like natcasesort. &reftitle.notes; ¬e.no-key-association; Like most PHP sorting functions, sort uses an implementation of Quicksort. The pivot is chosen in the middle of the partition resulting in an optimal time for already sorted arrays. This is however an implementation detail you shouldn't rely on. Be careful when sorting arrays with mixed types values because sort can produce unexpected results, if flags is SORT_REGULAR, &reftitle.seealso; asort rsort &seealso.array.sorting;