PHP array deduplication/

PHP array deduplication? Array deduplication

$ Term = array_column ($ grade, 'condition'); $ term = array_flip ($ term); print_r ($ term );

Effect:

Principle:

Array_flip ():

The function returns an inverted array. if the same value appears multiple times, the last key name will be used as its value, and all other key names will be lost.

If the data type of the value in the original array is not a string or integer, the function reports an error.

Two key-value exchanges. because PHP does not allow duplicate key names, deduplication is achieved.

Method 2:

Print_r (array_unique ($ term ));

The array_unique () function removes repeated values from the array and returns the result array.

When the values of several array elements are equal, only the first element is retained, and other elements are deleted.

The input key of the returned array remains unchanged.