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<?php $emails = '"Bob Smith" <bob@company.com>, joe@company.com, "John Doe"<john@company.com>, Billy Doe<billy@company.com>'; preg_match_all('/(?|(?|"([^"]+)"|([^<@]+)) ?<(.+?)>|()(.+?))(?:$|, ?)/', $emails, $matches, PREG_SET_ORDER); var_export( array_column($matches, 1, 2) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/avNaR
function name:  (null)
number of ops:  16
compiled vars:  !0 = $emails, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%22Bob+Smith%22+%3Cbob%40company.com%3E%2C+joe%40company.com%2C+%22John+Doe%22%3Cjohn%40company.com%3E%2C+Billy+Doe%3Cbilly%40company.com%3E'
    5     1        INIT_FCALL                                               'preg_match_all'
          2        SEND_VAL                                                 '%2F%28%3F%7C%28%3F%7C%22%28%5B%5E%22%5D%2B%29%22%7C%28%5B%5E%3C%40%5D%2B%29%29+%3F%3C%28.%2B%3F%29%3E%7C%28%29%28.%2B%3F%29%29%28%3F%3A%24%7C%2C+%3F%29%2F'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        SEND_VAL                                                 2
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'var_export'
    7     8        INIT_FCALL                                               'array_column'
          9        SEND_VAR                                                 !1
         10        SEND_VAL                                                 1
         11        SEND_VAL                                                 2
         12        DO_ICALL                                         $4      
         13        SEND_VAR                                                 $4
    6    14        DO_ICALL                                                 
    8    15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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