Php/docs/internals2.opcodes.isset-isempty-var
From Get docs
ISSET_ISEMPTY_VAR
PHP code
<?php/* * Tests if the value of a variable is set or not. * opcode number: 114 */if(isset($a)){ return 0;}?>
PHP opcodes
Function name: (null)
Compiled variables: !0=$a
| line | # | op | fetch | ext | return | operands |
|---|---|---|---|---|---|---|
| 6 | 0 | ZEND_ISSET_ISEMPTY_VAR | 5 | ~0 | !0 | |
| 1 | JMPZ | ~0,->4 | ||||
| 2 | RETURN | 0 | ||||
| 3 | JMP | ->4 | ||||
| 7 | 4 | RETURN | 1 |
