Php/docs/internals2.opcodes.bool-not

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BOOL_NOT

PHP code

<?php/* * Boolean (logical) not of "value" * opcode number: 13 */echo !1;?>

PHP opcodes

Function name: (null)

Compiled variables: none

line # op fetch ext return operands
6 0 BOOL_NOT     ~0 1
  1 ECHO       ~0
7 2 RETURN       1