PHP Array_flip () remove a repeating array element special function _php Tips

Description
Array Array_flip (array trans)
Array_flip () returns an inverted array, for example, the key name in trans becomes a value, and the value in trans is the key name.
Note that the value in trans needs to be able to be a valid key name, such as an integer or string. A warning is issued if the type of the value is not correct, and the problematic key/value pair will not be reversed.
If the same value occurs more than once, the last key name is the value, and all the others are lost.
Array_flip () If the failure returns FALSE.
Instance:

Copy Code code as follows:

$hills =array ("The =>" Data1″, "second" => "Data2″", "third" => "Data1″");
$hills =array_flip ($hills); Restore Key Name
$hills 1=array_flip (Array_flip ($hills));//Delete duplicates
Display $hills 1

The result:

Data2 data1 two data.