文字
FETCH_IS
PHP code
<?php
echo isset( $_SESSION [ 'userid' ]);
echo isset( $_SESSION [ 'userid' ][ 1 ]);
echo isset( $_SESSION -> prop -> prop );
?> PHP opcodes
Function name: (null)
Compiled variables: none
| line | # | op | fetch | ext | return | operands |
|---|---|---|---|---|---|---|
| 6 | 0 | FETCH_IS | $0 | '_SESSION' | ||
| 1 | ZEND_ISSET_ISEMPTY_DIM_OBJ | 1 | ~1 | $0,'userid' | ||
| 2 | ECHO | ~1 | ||||
| 7 | 3 | FETCH_IS | $2 | '_SESSION' | ||
| 4 | FETCH_DIM_IS | $3 | $2,'userid' | |||
| 5 | ZEND_ISSET_ISEMPTY_DIM_OBJ | 1 | ~4 | $3,1 | ||
| 6 | ECHO | ~4 | ||||
| 8 | 7 | FETCH_IS | $5 | '_SESSION' | ||
| 8 | FETCH_OBJ_IS | $6 | $5,'prop' | |||
| 9 | ZEND_ISSET_ISEMPTY_PROP_OBJ | ~7 | $6,'prop' | |||
| 10 | ECHO | ~7 | ||||
| 9 | 11 | RETURN | 1 |