Common PHP Algorithms: Bubble sorting, fast sorting, insert sorting, trade-off sorting, and binary search ,.]

Source: Internet
Author: User
Common PHP Algorithms: Bubble sorting, fast sorting, insert sorting, selection sorting, binary search ,..] bubble sorting functionbubblesort (\$ arr) {for (\$ i0, \$ jcount (\$ arr); \$ I & lt; \$ j; \$ I ++) {for (\$ k \$ J-1; \$ k & gt; \$ I; \$ k --) {PHP common algorithms [bubble sort, fast sort, insert sort, select sort, binary search ,..]
`// Bubble sorting function bubblesort (\$ arr) {for (\$ I = 0, \$ j = count (\$ arr); \$ I <\$ j; \$ I ++) {for (\$ k = \$ J-1; \$ k> \$ I; \$ k --) {if (\$ arr [\$ k] <\$ arr [\$ k-1]) list (\$ arr [\$ k-1], \$ arr [\$ k]) = array (\$ arr [\$ k], \$ arr [\$ k-1]);} return \$ arr;} \$ arr = array (123,); print_r (bubblesort (\$ arr ));`
`// Quick sorting function quicksort (\$ arr) {if (\$ count = count (\$ arr) <= 1) return \$ arr; \$ base = \$ arr [0]; \$ left = \$ right = array (); for (\$ I = 1; \$ I <\$ count; \$ I ++) {if (\$ arr [\$ I] <= \$ base) \$ left [] = \$ arr [\$ I]; else \$ right [] = \$ arr [\$ I];} \$ left = quicksort (\$ left); \$ right = quicksort (\$ right); return array_merge (\$ left, array (\$ base), \$ right);} echo join (', ', quicksort (array (1, 3, 65, 6 )));?`
`// Insert the sorting function insertsort (\$ arr) {for (\$ I = 1, \$ j = count (\$ arr); \$ I <\$ j; \$ I ++) {\$ k = \$ I; while (\$ k> 0 & \$ arr [\$ k-1]> \$ arr [\$ k]) {list (\$ arr [\$ k], \$ arr [\$ k-1]) = array (\$ arr [\$ k-1], \$ arr [\$ k]); \$ k -- ;}} return \$ arr ;} \$ array = array (,); print_r (insertsort (\$ array ));`

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`// Select sorting, (non-recursive) function selectsort (\$ arr) {for (\$ I = 0, \$ j = count (\$ arr); \$ I <= \$ j; \$ I ++) {\$ min = \$ I; \$ temp = \$ arr [\$ I]; for (\$ k = \$ I + 1; \$ k <\$ j; \$ k ++) {if (\$ temp> \$ arr [\$ k]) {\$ min = \$ k; \$ temp = \$ arr [\$ k] ;}} if (\$ min! = \$ I) list (\$ arr [\$ min], \$ arr [\$ I]) = array (\$ arr [\$ I], \$ arr [\$ min]);} return \$ arr;} \$ arr = array (9, 3, 11, 23, 90, 99, 12, 34, 22, 87, 32); print_r (selectsort (\$ arr ));`

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`// Select sorting (recursive implementation) function selectsort2 (\$ arr, \$ start = 0) {if (\$ count = count (\$ arr) = \$ start + 1) return \$ arr; \$ new = array (); \$ min = \$ arr [\$ start]; \$ min_index = \$ start; for (\$ I = \$ start + 1; \$ I <\$ count-1; \$ I ++) {if (\$ arr [\$ I] <\$ min) {\$ min = \$ arr [\$ I]; \$ min_index = \$ I;} if (\$ arr [\$ start]! = \$ Min) list (\$ arr [\$ start], \$ arr [\$ min_index]) = array (\$ arr [\$ min_index], \$ arr [\$ start]); return selectsort (\$ arr, \$ start + 1);} \$ arr = array (9, 3, 11, 23, 90, 99, 12, 34, 32); print_r (selectsort (\$ arr ));`
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` \$ Base) return binarysearch (\$ arr, \$ value, \$ index + 1, \$ end); else return \$ index ;}\$ arr = array (1, 3, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20); \$ value = 8; echo binarysearch (\$ arr, \$ value );`
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