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<?php $mce_init = array( 'plugins' => '', 'toolbar1' => '' ); $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; // All is OK: print_r( $mce_init ); unset( $mce_init['plugins'], $mce_init['toolbar1'] ); // Triggers a warning in PHP 5.2.17: $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; print_r( $mce_init ); // Should trigger the reported fatal in https://core.trac.wordpress.org/ticket/45482; $mce_init = 'string'; // '', array(), new stdClass, null, false, etc do not trigger the specific fatal. $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; print_r( $mce_init );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZVCKP
function name:  (null)
number of ops:  26
compiled vars:  !0 = $mce_init
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        ASSIGN_DIM_OP                .=               8          !0, 'plugins'
          2        OP_DATA                                                  '%2Cdirectionality'
    6     3        ASSIGN_DIM_OP                .=               8          !0, 'toolbar1'
          4        OP_DATA                                                  '%2Cltr'
    9     5        INIT_FCALL                                               'print_r'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
   11     8        UNSET_DIM                                                !0, 'plugins'
          9        UNSET_DIM                                                !0, 'toolbar1'
   14    10        ASSIGN_DIM_OP                .=               8          !0, 'plugins'
         11        OP_DATA                                                  '%2Cdirectionality'
   15    12        ASSIGN_DIM_OP                .=               8          !0, 'toolbar1'
         13        OP_DATA                                                  '%2Cltr'
   17    14        INIT_FCALL                                               'print_r'
         15        SEND_VAR                                                 !0
         16        DO_ICALL                                                 
   20    17        ASSIGN                                                   !0, 'string'
   22    18        ASSIGN_DIM_OP                .=               8          !0, 'plugins'
         19        OP_DATA                                                  '%2Cdirectionality'
   23    20        ASSIGN_DIM_OP                .=               8          !0, 'toolbar1'
         21        OP_DATA                                                  '%2Cltr'
   25    22        INIT_FCALL                                               'print_r'
         23        SEND_VAR                                                 !0
         24        DO_ICALL                                                 
         25      > RETURN                                                   1

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