PHP - Manual: ISSET_ISEMPTY_VAR
2024-12-21
<?php
/*
* Tests if the value of a variable is set or not.
* opcode number: 114
*/
if(isset($a)){ return 0;}
?>
Function name: (null)
Compiled variables: !0=$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 |
官方地址:https://www.php.net/manual/en/internals2.opcodes.isset-isempty-var.php