PHP - Manual: SUB
2025-11-04
<?php
/*
 * Subtracts "value2" from "value1" and stores the result into "result".
 * opcode number: 2
 */
echo 1-2;
?>
Function name: (null)
Compiled variables: none
| line | # | op | fetch | ext | return | operands | 
|---|---|---|---|---|---|---|
| 6 | 0 | SUB | ~0 | 1,2 | ||
| 1 | ECHO | ~0 | ||||
| 7 | 2 | RETURN | 1 | 
官方地址:https://www.php.net/manual/en/internals2.opcodes.sub.php