Internals2/opcodes/sl-Phpdoc专题
SL
PHP code
<?php
/*
* Shift bits of value1 to the left value2 steps (each step means "multiply by two")
* opcode number: 6
*/
echo 8 << 2;
?>PHP opcodes
Function name: (null)
Compiled variables: none
| line | # | op | fetch | ext | return | operands |
|---|---|---|---|---|---|---|
| 6 | 0 | SL | ~0 | 8,2 | ||
| 1 | ECHO | ~0 | ||||
| 7 | 2 | RETURN | 1 |