Array constants are a list of values that can be used as arguments in your array formulas.
| Sr.No | Constant | Description |
|---|---|---|
| 1 | CASE_LOWER | Used with array_change_key_case() to convert array keys to lower case |
| 2 | CASE_UPPER | Used with array_change_key_case() to convert array keys to upper case |
| 3 | SORT_ASC | Used with array_multisort() to sort in ascending order |
| 4 | SORT_DESC | Used with array_multisort() to sort in descending order |
| 5 | SORT_REGULAR | Used to compare items normally |
| 6 | SORT_NUMERIC | Used to compare items numerically |
| 7 | SORT_STRING | Used to compare items as strings |
| 8 | SORT_LOCALE_STRING | Used to compare items as strings, based on the current locale |
| 9 | COUNT_NORMAL | |
| 10 | COUNT_RECURSIVE | |
| 11 | EXTR_OVERWRITE | |
| 12 | EXTR_SKIP | |
| 13 | EXTR_PREFIX_SAME | |
| 14 | EXTR_PREFIX_ALL | |
| 15 | EXTR_PREFIX_INVALID | |
| 16 | EXTR_PREFIX_IF_EXISTS | |
| 17 | EXTR_IF_EXISTS | |
| 18 | EXTR_REFS |
