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<?php $re = '/\[[^][\d]*\K\d+(?:\.\d+)?(?=[^][]*])/'; $str = 'I have the following expression [+₪7.00], I wish to extract only 7.00 or 7.'; if (preg_match_all($re, $str, $matches)) { print_r($matches[0]); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/fnF7G
function name:  (null)
number of ops:  13
compiled vars:  !0 = $re, !1 = $str, !2 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2F%5C%5B%5B%5E%5D%5B%5Cd%5D%2A%5CK%5Cd%2B%28%3F%3A%5C.%5Cd%2B%29%3F%28%3F%3D%5B%5E%5D%5B%5D%2A%5D%29%2F'
    4     1        ASSIGN                                                   !1, 'I+have+the+following+expression+%5B%2B%E2%82%AA7.00%5D%2C+I+wish+to+extract+only+7.00+or+7.'
    5     2        INIT_FCALL                                               'preg_match_all'
          3        SEND_VAR                                                 !0
          4        SEND_VAR                                                 !1
          5        SEND_REF                                                 !2
          6        DO_ICALL                                         $5      
          7      > JMPZ                                                     $5, ->12
    6     8    >   INIT_FCALL                                               'print_r'
          9        FETCH_DIM_R                                      ~6      !2, 0
         10        SEND_VAL                                                 ~6
         11        DO_ICALL                                                 
    7    12    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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