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<?php $a = [ 'sss4444dfdf', //лишние '444444', //много 'sdfsdf', //все не то '', // '4', //мало ]; print_r(preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sAB2i
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    9     1        INIT_FCALL                                               'print_r'
          2        INIT_FCALL                                               'preg_filter'
          3        SEND_VAL                                                 '%2F%5E%5CD%2A%28%5Cd%7B2%2C4%7D%29.%2A%24%2F'
          4        SEND_VAL                                                 '%241'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $2      
          7        SEND_VAR                                                 $2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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