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<?php $strings = [ "1 800-555-1111", "1 222-555-1111", "888-555-1111", "1 888 555 1111", "1 ", "1 2" ]; $pattern = '/^1\h+(?=\d(?:[^\d\n\r]?\d){9}$)/'; foreach ($strings as $s) { echo preg_replace($pattern, '', $s) . PHP_EOL; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 9
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 9
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
filename:       /in/9CLTf
function name:  (null)
number of ops:  11
compiled vars:  !0 = $strings, !1 = $pattern, !2 = $s
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   11     1        ASSIGN                                                       !1, '%2F%5E1%5Ch%2B%28%3F%3D%5Cd%28%3F%3A%5B%5E%5Cd%5Cn%5Cr%5D%3F%5Cd%29%7B9%7D%24%29%2F'
   12     2      > FE_RESET_R                                           $5      !0, ->9
          3    > > FE_FETCH_R                                                   $5, !2, ->9
   13     4    >   FRAMELESS_ICALL_3                preg_replace        ~6      !1, ''
          5        OP_DATA                                                      !2
          6        CONCAT                                               ~7      ~6, '%0A'
          7        ECHO                                                         ~7
   12     8      > JMP                                                          ->3
          9    >   FE_FREE                                                      $5
   14    10      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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