Internals2/opcodes/isset-isempty-prop-obj-Phpdoc专题
ISSET_ISEMPTY_PROP_OBJ
PHP code
<?php
/*
*
* opcode number: 148
*/
$obj = new A();
if(empty($obj->num)) return 0;
?>PHP opcodes
Function name: (null)
Compiled variables: !0=$obj
| line | # | op | fetch | ext | return | operands |
|---|---|---|---|---|---|---|
| 6 | 0 | ZEND_FETCH_CLASS | :0 | 'A' | ||
| 1 | NEW | $1 | :0 | |||
| 2 | DO_FCALL_BY_NAME | 0 | ||||
| 3 | ASSIGN | !0,$1 | ||||
| 7 | 4 | ZEND_ISSET_ISEMPTY_PROP_OBJ | ~4 | !0,'num' | ||
| 5 | JMPZ | ~4,->8 | ||||
| 6 | RETURN | 0 | ||||
| 7 | JMP | ->8 | ||||
| 8 | 8 | RETURN | 1 |