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<?php $test = array('key' => 'value'); print_r(array_filter($test, function($key, $value){ return $value == 'value';}) );
based on Y843a
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/YaDWW
function name:  (null)
number of ops:  10
compiled vars:  !0 = $test
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, <array>
   5     1        INIT_FCALL                                               'print_r'
         2        INIT_FCALL                                               'array_filter'
         3        SEND_VAR                                                 !0
         4        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FYaDWW0x7f1658c28076'
         5        SEND_VAL                                                 ~2
         6        DO_ICALL                                         $3      
         7        SEND_VAR                                                 $3
         8        DO_ICALL                                                 
   6     9      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FYaDWW0x7f1658c28076:
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/YaDWW
function name:  {closure}
number of ops:  5
compiled vars:  !0 = $key, !1 = $value
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   5     0  E >   RECV                                             !0      
         1        RECV                                             !1      
         2        IS_EQUAL                                         ~2      !1, 'value'
         3      > RETURN                                                   ~2
         4*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FYaDWW0x7f1658c28076

Generated using Vulcan Logic Dumper, using php 7.2.0