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本文档使用 PHP中文网手册 发布
<?php
echo isset( $_SESSION [ 'userid' ]);
echo isset( $_SESSION [ 'userid' ][ 1 ]);
echo isset( $_SESSION -> prop -> prop );
?>
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 |