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<?php $string = " <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <p>9</p> <p>10</p> <p>11</p> <p>12</p> <p>13</p> <p>14</p> <p>15</p> <p>16</p> <p>17</p> "; echo preg_replace('~(?:.*?</p>){5}\K~s', "\n [next]", $string);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/bUPvR
function name:  (null)
number of ops:  8
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%0A++++%3Cp%3E1%3C%2Fp%3E%0A++++%3Cp%3E2%3C%2Fp%3E%0A++++%3Cp%3E3%3C%2Fp%3E%0A++++%3Cp%3E4%3C%2Fp%3E%0A++++%3Cp%3E5%3C%2Fp%3E%0A++++%3Cp%3E6%3C%2Fp%3E%0A++++%3Cp%3E7%3C%2Fp%3E%0A++++%3Cp%3E8%3C%2Fp%3E%0A++++%3Cp%3E9%3C%2Fp%3E%0A++++%3Cp%3E10%3C%2Fp%3E%0A++++%3Cp%3E11%3C%2Fp%3E%0A++++%3Cp%3E12%3C%2Fp%3E%0A++++%3Cp%3E13%3C%2Fp%3E%0A++++%3Cp%3E14%3C%2Fp%3E%0A++++%3Cp%3E15%3C%2Fp%3E%0A++++%3Cp%3E16%3C%2Fp%3E%0A++++%3Cp%3E17%3C%2Fp%3E%0A++++'
   23     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%7E%28%3F%3A.%2A%3F%3C%2Fp%3E%29%7B5%7D%5CK%7Es'
          3        SEND_VAL                                                 '%0A++++%5Bnext%5D'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
147.84 ms | 1000 KiB | 14 Q