   #PHP Manual Array Functions sort uksort

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                                    uasort

   (PHP 3>= 3.0.4, PHP 4 )
   uasort --  Sort an array with a user-defined comparison function and
   maintain index association

Description

   void uasort ( array array, callback cmp_function)

   This function sorts an array such that array indices maintain their
   correlation with the array elements they are associated with. This is
   used mainly when sorting associative arrays where the actual element
   order is significant. The comparison function is user-defined.

     Note: Please see usort() and uksort() for examples of user-defined
     comparison functions.

   See also usort(), uksort(), sort(), asort(), arsort(), ksort(), and
   rsort().
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