3v4l.org

run code in 300+ PHP versions simultaneously
<?php $empty = ''; $string = '0'; $integer = 0; echo 'is_numeric(\'\') : ' . (is_numeric($empty) ? 'true' : 'false').PHP_EOL; echo 'is_numeric(\'1\') : ' . (is_numeric($string) ? 'true' : 'false').PHP_EOL; echo 'is_numeric(1) : ' . (is_numeric($integer) ? 'true' : 'false').PHP_EOL;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 17, Position 2 = 19
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 29
Branch analysis from position: 27
1 jumps found. (Code = 42) Position 1 = 30
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 29
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 19
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 29
Branch analysis from position: 27
Branch analysis from position: 29
Branch analysis from position: 9
2 jumps found. (Code = 43) Position 1 = 17, Position 2 = 19
Branch analysis from position: 17
Branch analysis from position: 19
filename:       /in/6dsZ7
function name:  (null)
number of ops:  34
compiled vars:  !0 = $empty, !1 = $string, !2 = $integer
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, ''
    4     1        ASSIGN                                                   !1, '0'
    5     2        ASSIGN                                                   !2, 0
    7     3        INIT_FCALL                                               'is_numeric'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $6      
          6      > JMPZ                                                     $6, ->9
          7    >   QM_ASSIGN                                        ~7      'true'
          8      > JMP                                                      ->10
          9    >   QM_ASSIGN                                        ~7      'false'
         10    >   CONCAT                                           ~8      'is_numeric%28%27%27%29+%3A+', ~7
         11        CONCAT                                           ~9      ~8, '%0A'
         12        ECHO                                                     ~9
    8    13        INIT_FCALL                                               'is_numeric'
         14        SEND_VAR                                                 !1
         15        DO_ICALL                                         $10     
         16      > JMPZ                                                     $10, ->19
         17    >   QM_ASSIGN                                        ~11     'true'
         18      > JMP                                                      ->20
         19    >   QM_ASSIGN                                        ~11     'false'
         20    >   CONCAT                                           ~12     'is_numeric%28%271%27%29+%3A+', ~11
         21        CONCAT                                           ~13     ~12, '%0A'
         22        ECHO                                                     ~13
    9    23        INIT_FCALL                                               'is_numeric'
         24        SEND_VAR                                                 !2
         25        DO_ICALL                                         $14     
         26      > JMPZ                                                     $14, ->29
         27    >   QM_ASSIGN                                        ~15     'true'
         28      > JMP                                                      ->30
         29    >   QM_ASSIGN                                        ~15     'false'
         30    >   CONCAT                                           ~16     'is_numeric%281%29+%3A+', ~15
         31        CONCAT                                           ~17     ~16, '%0A'
         32        ECHO                                                     ~17
   10    33      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
169.66 ms | 1400 KiB | 15 Q